feat: introduce shortcuts and shell hook support

- **Shortcuts**: Add hostname normalization with domain stripping and hyphen folding. Include alias generation for cached hosts.
- **Shell Hook**: Automate 24h cache refresh trigger with shell startup hook. Add install/uninstall commands for bash, zsh, and fish.
- **Wizard**: Extend setup wizard to configure shortcuts (domains, hyphen stripping) and default SSH port.
- **Cache**: Add `GetByShortcut` for resolving hosts via normalized shortcuts. Implement `NeedsRefresh` / `SetRefreshed` logic for refresh timestamps.
- **Tests**: Comprehensive unit tests for shortcuts, hook installation, cache refresh, and alias generation.
- **Docs**: Update README with shortcuts, shell hook, and default SSH port configuration.

README.md

@@ -27,6 +27,10 @@ netssh -p 2222 admin@app-server-03 uptime
 - **Setup wizard** — interactive first-run onboarding; re-run anytime with `netssh configure`
 - **Shell completion** — install without sudo via `netssh completion install`
 - **Default SSH user** — set a fallback username once in config instead of typing it every time
+- **Default SSH port** — set a fallback port in config; injected as `-p` when not specified on the command line
+- **Host shortcuts** — type `web01` instead of `web01.example.com`; configurable domain strip and hyphen folding
+- **Shell aliases** — `netssh alias` generates shell aliases for all cached hosts
+- **Automatic 24h cache refresh** — the cache is refreshed in the background every 24 hours
 
 ## Installation
 
@@ -94,6 +98,12 @@ cache:
 
 ssh:
   default_user: admin  # used when no user is specified on the command line
+  default_port: 2222   # optional; injected as -p if not specified on the command line
+
+shortcuts:
+  domains:             # strip these suffixes to create short aliases
+    - .example.com
+  strip_hyphens: false # if true, fsn1-web01 → fsn1web01 (cache-only resolution)
 ```
 
 Any value can be overridden with environment variables (`NETSSH_NETBOX_URL`, `NETSSH_NETBOX_TOKEN`, etc.).
@@ -139,6 +149,76 @@ netssh root@my-router          # user@ prefix wins → ssh root@10.0.0.1
 netssh -l ops my-router        # -l flag wins      → ssh -l ops 10.0.0.1
 ```
 
+### Default SSH port
+
+Set `ssh.default_port` in the config to use a non-standard port without specifying it every time:
+
+```sh
+netssh my-router        # → ssh -p 2222 -l admin 10.0.0.1
+```
+
+The default is only applied when `-p` is not already present in the SSH arguments. An explicit `-p` always takes precedence:
+
+```sh
+netssh -p 22 my-router  # -p flag wins → ssh -p 22 10.0.0.1
+```
+
+### Host shortcuts
+
+Configure short aliases so you can type `web01` instead of `web01.example.com`:
+
+```yaml
+shortcuts:
+  domains:
+    - .example.com
+    - .example.de
+  strip_hyphens: false  # optional
+```
+
+Resolution order:
+
+1. **Exact match** — the input is looked up as-is in the cache.
+2. **Domain expansion** — if the input contains no dot, each configured domain is appended and tried (`web01` → `web01.example.com`). If no cache hit, NetBox is queried with the expanded name.
+3. **Hyphen folding** (`strip_hyphens: true`) — hyphens are inserted back before looking up in the cache (`fsn1web01` → `fsn1-web01.example.com`). This only works when the host is already cached; run `netssh cache refresh` first.
+
+| Input | Config | Resolved as |
+|-------|--------|-------------|
+| `web01` | `domains: [.example.com]` | `web01.example.com` |
+| `fsn1web01` | `domains: [.example.com]`, `strip_hyphens: true` | `fsn1-web01.example.com` (cache only) |
+
+### Shell aliases
+
+Generate shell aliases for all cached hosts based on the shortcut settings:
+
+```sh
+netssh alias                  # bash/zsh syntax
+netssh alias --shell fish     # fish syntax
+```
+
+Example output:
+
+```bash
+# netssh aliases (3 hosts) — source with: eval "$(netssh alias)"
+alias db01='netssh db01.example.com'
+alias fsn1web01='netssh fsn1-web01.example.com'
+alias web01='netssh web01.example.com'
+```
+
+Add to your shell startup file:
+
+```sh
+# bash / zsh — in ~/.bashrc or ~/.zshrc
+eval "$(netssh alias)"
+
+# fish — in ~/.config/fish/config.fish
+netssh alias --shell fish | source
+
+# scripts
+source <(netssh alias)
+```
+
+Without a `shortcuts` config, the alias name is derived from the full hostname with dots replaced by underscores (e.g. `web01_example_com`). If two hosts would produce the same alias name, the first entry wins and a warning is printed to stderr.
+
 ### Interactive TUI
 
 Run without arguments to open the interactive search:
@@ -186,6 +266,25 @@ netssh cache refresh --tag prod --kind vm # combine filters
 netssh cache clear                        # wipe the cache
 ```
 
+The cache is refreshed automatically in the background every 24 hours. The trigger fires on the next SSH connect or TUI start after the interval has elapsed — there is no delay to the connection itself. The timestamp of the last refresh is stored in `~/.cache/netssh/last_refresh`.
+
+To also trigger the check at shell startup (before you run any SSH command), install the shell hook:
+
+```sh
+netssh hook install             # auto-detects $SHELL
+netssh hook install --shell bash
+netssh hook install --shell zsh
+netssh hook install --shell fish
+```
+
+This appends a single line (`netssh shell-init`) to your shell profile. To remove it:
+
+```sh
+netssh hook uninstall
+```
+
+The hook is a no-op when the cache is fresh — it adds no measurable delay to your shell startup.
+
 ### Search (for scripting)
 
 ```sh
@@ -228,6 +327,59 @@ autoload -Uz compinit && compinit
 
 Completions are served from the local cache — no network request on every `<Tab>`.
 
+## Shell Hook
+
+The shell hook runs `netssh shell-init` at the start of every new shell session. It checks whether the cache is older than 24 hours and, if so, starts a background refresh. The check reads a single small file and adds no measurable delay to your shell startup.
+
+### Install
+
+```sh
+netssh hook install             # auto-detects $SHELL
+netssh hook install --shell bash
+netssh hook install --shell zsh
+netssh hook install --shell fish
+```
+
+This appends exactly one line to your shell profile:
+
+```sh
+netssh shell-init  # netssh cache auto-refresh
+```
+
+| Shell | Profile file |
+|-------|-------------|
+| bash  | `~/.bashrc` |
+| zsh   | `~/.zshrc` |
+| fish  | `~/.config/fish/config.fish` |
+
+The install is idempotent — running it again does nothing if the hook is already present.
+
+Reload your profile after installation:
+
+```sh
+source ~/.bashrc    # bash
+source ~/.zshrc     # zsh
+source ~/.config/fish/config.fish  # fish
+```
+
+### Uninstall
+
+```sh
+netssh hook uninstall             # auto-detects $SHELL
+netssh hook uninstall --shell zsh
+```
+
+Removes the `netssh shell-init` line from the profile and collapses any blank lines left behind.
+
+### How it differs from the connect-time trigger
+
+| Trigger | When it fires |
+|---------|--------------|
+| Connect / TUI start | On the next SSH command or `netssh` TUI after 24 h |
+| Shell hook | On the first new shell session after 24 h |
+
+Both triggers are non-blocking: the refresh runs in the background and your SSH connection (or prompt) is not delayed. You can install both — they share the same `~/.cache/netssh/last_refresh` timestamp, so the background process runs at most once per 24 hours regardless of how many shells or connections you open.
+
 ## Development
 
 ```sh
@@ -235,7 +387,7 @@ go test ./...        # run all tests
 go build ./...       # build all packages
 ```
 
-The test suite covers the cache, NetBox client (via `httptest`), IP resolver chain, SSH argument parser, config loading, and the setup wizard.
+The test suite covers the cache, NetBox client (via `httptest`), IP resolver chain, SSH argument parser, config loading, setup wizard, shortcut normalization, and shell hook install/uninstall.
 
 ## Disclaimer
 
@@ -246,6 +398,6 @@ This is a **vibe-coded** project: the entire codebase — architecture, implemen
 1. `netssh` checks whether the first argument is a known subcommand (`configure`, `search`, `cache`, `completion`). If not, it enters SSH wrapper mode.
 2. On first run or when `netbox.url` is empty, the interactive setup wizard starts automatically.
 3. It parses the SSH arguments to extract the destination hostname, handling all flags that consume an extra argument (`-p`, `-i`, `-J`, …).
-4. It checks the local cache. If the entry exists and is within the TTL, it connects immediately.
+4. It resolves the destination: first an exact cache lookup, then shortcut expansion (domain append, hyphen folding) against the cache, and finally a fresh NetBox query with the expanded name. If the cache entry is within the TTL, no network request is made.
 5. Otherwise it queries NetBox (`/api/dcim/devices/` and `/api/virtualization/virtual-machines/` in parallel), runs the result through the resolver chain, and caches the IP.
 6. It calls `syscall.Exec` to replace itself with `ssh`, substituting the hostname with the resolved IP.

cmd/netssh/main.go

@@ -4,8 +4,10 @@ import (
 	"context"
 	"fmt"
 	"os"
+	"os/exec"
 	"path/filepath"
 	"sort"
+	"strconv"
 	"strings"
 	"text/tabwriter"
 	"time"
@@ -15,9 +17,11 @@ import (
 
 	"git.zb-server.de/Sebi/ssh-netbox-wrapper/internal/cache"
 	"git.zb-server.de/Sebi/ssh-netbox-wrapper/internal/config"
+	"git.zb-server.de/Sebi/ssh-netbox-wrapper/internal/hook"
 	"git.zb-server.de/Sebi/ssh-netbox-wrapper/internal/netbox"
 	"git.zb-server.de/Sebi/ssh-netbox-wrapper/internal/resolver"
 	"git.zb-server.de/Sebi/ssh-netbox-wrapper/internal/setup"
+	"git.zb-server.de/Sebi/ssh-netbox-wrapper/internal/shortcuts"
 	internalssh "git.zb-server.de/Sebi/ssh-netbox-wrapper/internal/ssh"
 	"git.zb-server.de/Sebi/ssh-netbox-wrapper/internal/tui"
 )
@@ -27,6 +31,9 @@ var managedSubcommands = map[string]bool{
 	"configure":  true,
 	"search":     true,
 	"cache":      true,
+	"alias":      true,
+	"hook":       true,
+	"shell-init": true,
 	"completion": true,
 	"__complete": true,
 	"help":       true,
@@ -87,9 +94,15 @@ func runSSHWrapper(args []string) {
 		args = append([]string{"-l", cfg.SSH.DefaultUser}, args...)
 		parsed.DestIdx += 2
 	}
+	// Inject the configured default port if none was given on the command line.
+	if cfg.SSH.DefaultPort > 0 && !internalssh.HasPortFlag(args) {
+		args = append([]string{"-p", strconv.Itoa(cfg.SSH.DefaultPort)}, args...)
+		parsed.DestIdx += 2
+	}
 
 	c := cache.New(cfg.Cache.Path, cfg.Cache.TTL)
 	_ = c.Load()
+	maybeBackgroundRefresh(cfg, c)
 
 	// Cache hit with a fresh TTL — connect directly without querying NetBox.
 	if entry, fresh := c.Get(parsed.Host); fresh {
@@ -99,6 +112,24 @@ func runSSHWrapper(args []string) {
 		return
 	}
 
+	// Shortcut cache lookup: scan entries whose normalized name matches the input.
+	// If a stale match is found, use the canonical name for the NetBox re-fetch below.
+	lookupHost := parsed.Host
+	shortcutsEnabled := len(cfg.Shortcuts.Domains) > 0 || cfg.Shortcuts.StripHyphens
+	if shortcutsEnabled {
+		normalize := shortcuts.MakeNormalizer(cfg.Shortcuts)
+		if entry, found, fresh := c.GetByShortcut(lookupHost, normalize); found {
+			if fresh {
+				c.MarkUsed(entry.Name)
+				_ = c.Save()
+				connect(entry.IP, parsed, args)
+				return
+			}
+			// Stale shortcut match — use canonical name for NetBox re-fetch.
+			lookupHost = entry.Name
+		}
+	}
+
 	if cfg.NetBox.URL == "" {
 		fatalf("netbox.url is not configured (~/.config/netssh.yaml)")
 	}
@@ -107,18 +138,40 @@ func runSSHWrapper(args []string) {
 	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
 	defer cancel()
 
-	entries, err := nbClient.Search(ctx, parsed.Host, netbox.SearchOptions{})
+	entries, err := nbClient.Search(ctx, lookupHost, netbox.SearchOptions{})
 	if err != nil {
 		fatalf("NetBox search failed: %v", err)
 	}
 
 	var target *netbox.HostEntry
 	for i, e := range entries {
-		if strings.EqualFold(e.Name, parsed.Host) {
+		if strings.EqualFold(e.Name, lookupHost) {
 			target = &entries[i]
 			break
 		}
 	}
+
+	// Domain expansion: if still no match and the input has no dots, try appending
+	// each configured domain suffix and re-querying NetBox.
+	if target == nil && !strings.Contains(parsed.Host, ".") && len(cfg.Shortcuts.Domains) > 0 {
+		for _, domain := range cfg.Shortcuts.Domains {
+			expanded := parsed.Host + domain
+			expandedEntries, searchErr := nbClient.Search(ctx, expanded, netbox.SearchOptions{})
+			if searchErr != nil {
+				continue
+			}
+			for i, e := range expandedEntries {
+				if strings.EqualFold(e.Name, expanded) {
+					target = &expandedEntries[i]
+					break
+				}
+			}
+			if target != nil {
+				break
+			}
+		}
+	}
+
 	if target == nil {
 		fatalf("host %q not found in NetBox", parsed.Host)
 	}
@@ -153,6 +206,7 @@ func runTUI() {
 
 	c := cache.New(cfg.Cache.Path, cfg.Cache.TTL)
 	_ = c.Load()
+	maybeBackgroundRefresh(cfg, c)
 
 	var nbClient *netbox.Client
 	if cfg.NetBox.URL != "" {
@@ -188,8 +242,12 @@ func runTUI() {
 		sshArgs = append(sshArgs, "-l", user)
 	}
 
-	if host.Port != "" {
-		sshArgs = append(sshArgs, "-p", host.Port)
+	port := host.Port
+	if port == "" && cfg.SSH.DefaultPort > 0 {
+		port = strconv.Itoa(cfg.SSH.DefaultPort)
+	}
+	if port != "" {
+		sshArgs = append(sshArgs, "-p", port)
 	}
 
 	sshArgs = append(sshArgs, host.IP)
@@ -231,7 +289,7 @@ func rootCmd() *cobra.Command {
 		},
 	}
 
-	root.AddCommand(configureCmd(), searchCmd(), cacheCmd())
+	root.AddCommand(configureCmd(), searchCmd(), cacheCmd(), aliasCmd(), hookCmd(), shellInitCmd())
 
 	// cobra builds the "completion" command lazily; force init so we can extend it.
 	root.InitDefaultCompletionCmd()
@@ -460,6 +518,9 @@ func cacheRefreshCmd() *cobra.Command {
 			if err := c.Save(); err != nil {
 				return err
 			}
+			if err := c.SetRefreshed(); err != nil {
+				fmt.Fprintf(os.Stderr, "warning: could not update refresh timestamp: %v\n", err)
+			}
 			fmt.Printf("%d entries written to cache.\n", len(entries))
 			return nil
 		},
@@ -469,6 +530,193 @@ func cacheRefreshCmd() *cobra.Command {
 	return cmd
 }
 
+func aliasCmd() *cobra.Command {
+	var shell string
+	cmd := &cobra.Command{
+		Use:   "alias",
+		Short: "Print shell aliases for all cached hosts",
+		Long: `Print shell alias definitions for all cached hosts.
+The alias name is the shortened form derived from the configured shortcuts
+(domain suffixes stripped, hyphens optionally stripped).
+
+Source the output in your shell profile:
+  bash/zsh:  eval "$(netssh alias)"
+  fish:      netssh alias --shell fish | source
+
+Or use in a script:
+  source <(netssh alias)`,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			cfg, err := config.Load()
+			if err != nil {
+				return err
+			}
+			c := cache.New(cfg.Cache.Path, cfg.Cache.TTL)
+			if err := c.Load(); err != nil {
+				return err
+			}
+			if shell == "" {
+				shell = filepath.Base(os.Getenv("SHELL"))
+			}
+
+			entries := c.All()
+			sort.Slice(entries, func(i, j int) bool {
+				return entries[i].Name < entries[j].Name
+			})
+
+			// Deduplicate: first host wins when two normalize to the same alias.
+			seen := make(map[string]string) // alias name → canonical name
+			var lines []string
+			for _, e := range entries {
+				aliasName := shortcuts.AliasName(e.Name, cfg.Shortcuts)
+				if aliasName == "" {
+					continue
+				}
+				if prev, exists := seen[aliasName]; exists {
+					fmt.Fprintf(os.Stderr, "netssh: alias %q conflict: %s and %s — skipping %s\n", aliasName, prev, e.Name, e.Name)
+					continue
+				}
+				seen[aliasName] = e.Name
+
+				switch shell {
+				case "fish":
+					lines = append(lines, fmt.Sprintf("alias %s 'netssh %s'", aliasName, e.Name))
+				default:
+					lines = append(lines, fmt.Sprintf("alias %s='netssh %s'", aliasName, e.Name))
+				}
+			}
+
+			if len(lines) == 0 {
+				fmt.Fprintln(os.Stderr, "netssh: cache is empty — run 'netssh cache refresh' first")
+				return nil
+			}
+
+			switch shell {
+			case "fish":
+				fmt.Printf("# netssh aliases (%d hosts) — source with: netssh alias --shell fish | source\n", len(lines))
+			default:
+				fmt.Printf("# netssh aliases (%d hosts) — source with: eval \"$(netssh alias)\"\n", len(lines))
+			}
+			for _, l := range lines {
+				fmt.Println(l)
+			}
+			return nil
+		},
+	}
+	cmd.Flags().StringVar(&shell, "shell", "", "Output format: bash, zsh, fish (default: $SHELL)")
+	return cmd
+}
+
+// shellInitCmd is called at shell startup to trigger a background cache refresh when stale.
+// It is intentionally silent — no output on success so it never disrupts shell startup.
+func shellInitCmd() *cobra.Command {
+	return &cobra.Command{
+		Use:    "shell-init",
+		Short:  "Trigger a background cache refresh if stale (add to shell profile via 'hook install')",
+		Hidden: true,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			cfg, err := config.Load()
+			if err != nil || cfg.NetBox.URL == "" {
+				return nil
+			}
+			c := cache.New(cfg.Cache.Path, cfg.Cache.TTL)
+			maybeBackgroundRefresh(cfg, c)
+			return nil
+		},
+	}
+}
+
+func hookCmd() *cobra.Command {
+	cmd := &cobra.Command{
+		Use:   "hook",
+		Short: "Manage shell hooks for automatic cache refresh at shell startup",
+	}
+	cmd.AddCommand(hookInstallCmd(), hookUninstallCmd())
+	return cmd
+}
+
+func hookInstallCmd() *cobra.Command {
+	var shell string
+	cmd := &cobra.Command{
+		Use:   "install",
+		Short: "Add netssh shell-init to your shell profile",
+		Long: `Appends a single line to your shell profile that runs 'netssh shell-init'
+on every new shell session. shell-init checks whether the cache is older
+than 24 hours and, if so, starts a background refresh — no delay to your prompt.
+
+After installation, reload your profile or open a new shell.`,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			if shell == "" {
+				shell = filepath.Base(os.Getenv("SHELL"))
+			}
+			profile, err := hook.ProfilePath(shell)
+			if err != nil {
+				return err
+			}
+			installed, err := hook.Install(profile)
+			if err != nil {
+				return err
+			}
+			if !installed {
+				fmt.Printf("Hook already installed in %s\n", profile)
+				return nil
+			}
+			fmt.Printf("Hook installed → %s\n%s\n", profile, hook.ReloadNote(profile))
+			return nil
+		},
+	}
+	cmd.Flags().StringVar(&shell, "shell", "", "Shell to install for (default: $SHELL). Supported: bash, zsh, fish")
+	return cmd
+}
+
+func hookUninstallCmd() *cobra.Command {
+	var shell string
+	cmd := &cobra.Command{
+		Use:   "uninstall",
+		Short: "Remove netssh shell-init from your shell profile",
+		RunE: func(cmd *cobra.Command, args []string) error {
+			if shell == "" {
+				shell = filepath.Base(os.Getenv("SHELL"))
+			}
+			profile, err := hook.ProfilePath(shell)
+			if err != nil {
+				return err
+			}
+			removed, err := hook.Uninstall(profile)
+			if err != nil {
+				return err
+			}
+			if !removed {
+				fmt.Printf("No hook found in %s\n", profile)
+				return nil
+			}
+			fmt.Printf("Hook removed from %s\n", profile)
+			return nil
+		},
+	}
+	cmd.Flags().StringVar(&shell, "shell", "", "Shell to uninstall from (default: $SHELL). Supported: bash, zsh, fish")
+	return cmd
+}
+
+// maybeBackgroundRefresh starts a background `netssh cache refresh` if the cache
+// has not been fully refreshed within the last 24 hours.
+func maybeBackgroundRefresh(cfg *config.Config, c *cache.Cache) {
+	if cfg.NetBox.URL == "" {
+		return
+	}
+	if !c.NeedsRefresh(24 * time.Hour) {
+		return
+	}
+	self, err := os.Executable()
+	if err != nil {
+		return
+	}
+	cmd := exec.Command(self, "cache", "refresh")
+	cmd.Stdout = nil
+	cmd.Stderr = nil
+	cmd.Stdin = nil
+	_ = cmd.Start() // fire and forget — becomes orphan after parent execs ssh
+}
+
 func fatalf(format string, args ...any) {
 	fmt.Fprintf(os.Stderr, "netssh: "+format+"\n", args...)
 	os.Exit(1)

internal/cache/cache.go

@@ -20,10 +20,11 @@ type Entry struct {
 }
 
 type Cache struct {
-	mu      sync.RWMutex
-	entries map[string]Entry
-	path    string
-	ttl     time.Duration
+	mu           sync.RWMutex
+	entries      map[string]Entry
+	path         string
+	ttl          time.Duration
+	refreshStamp string // path to last_refresh timestamp file
 }
 
 type diskFormat struct {
@@ -31,11 +32,48 @@ type diskFormat struct {
 }
 
 func New(path string, ttlSeconds int) *Cache {
-	return &Cache{
-		entries: make(map[string]Entry),
-		path:    path,
-		ttl:     time.Duration(ttlSeconds) * time.Second,
+	stamp := ""
+	if path != "" {
+		stamp = filepath.Join(filepath.Dir(path), "last_refresh")
 	}
+	return &Cache{
+		entries:      make(map[string]Entry),
+		path:         path,
+		ttl:          time.Duration(ttlSeconds) * time.Second,
+		refreshStamp: stamp,
+	}
+}
+
+// NeedsRefresh reports whether the last full cache refresh (via `cache refresh`)
+// is older than d, or has never happened. Always returns false when no path is set.
+func (c *Cache) NeedsRefresh(d time.Duration) bool {
+	if c.refreshStamp == "" {
+		return false
+	}
+	data, err := os.ReadFile(c.refreshStamp)
+	if err != nil {
+		return true // file missing → never refreshed
+	}
+	var t time.Time
+	if err := t.UnmarshalText(data); err != nil {
+		return true
+	}
+	return time.Since(t) >= d
+}
+
+// SetRefreshed records the current time as the last successful full refresh.
+func (c *Cache) SetRefreshed() error {
+	if c.refreshStamp == "" {
+		return nil
+	}
+	data, err := time.Now().MarshalText()
+	if err != nil {
+		return err
+	}
+	if err := os.MkdirAll(filepath.Dir(c.refreshStamp), 0o755); err != nil {
+		return err
+	}
+	return os.WriteFile(c.refreshStamp, data, 0o644)
 }
 
 func (c *Cache) Load() error {
@@ -137,6 +175,21 @@ func (c *Cache) Search(prefix string) []Entry {
 	return out
 }
 
+// GetByShortcut scans all entries and returns the first whose normalized name matches
+// the normalized shortcut. Returns (entry, found, fresh).
+func (c *Cache) GetByShortcut(shortcut string, normalize func(string) string) (entry Entry, found bool, fresh bool) {
+	c.mu.RLock()
+	defer c.mu.RUnlock()
+	norm := normalize(shortcut)
+	for _, e := range c.entries {
+		if normalize(e.Name) == norm {
+			isFresh := c.ttl > 0 && time.Since(e.CachedAt) < c.ttl
+			return e, true, isFresh
+		}
+	}
+	return Entry{}, false, false
+}
+
 // Get returns an entry and reports whether it is still within the TTL.
 func (c *Cache) Get(name string) (entry Entry, fresh bool) {
 	c.mu.RLock()

internal/cache/cache_test.go

@@ -300,6 +300,164 @@ func TestMarkUsed_RoundtripViaSave(t *testing.T) {
 	}
 }
 
+// --- GetByShortcut tests ---
+
+func TestGetByShortcut_MatchFresh(t *testing.T) {
+	c := New("", 3600)
+	c.Upsert(Entry{Name: "web01.example.com", IP: "10.0.0.1", Kind: "device"})
+
+	normalize := func(s string) string {
+		// strip .example.com
+		if len(s) > len(".example.com") && s[len(s)-len(".example.com"):] == ".example.com" {
+			s = s[:len(s)-len(".example.com")]
+		}
+		return s
+	}
+
+	e, found, fresh := c.GetByShortcut("web01", normalize)
+	if !found {
+		t.Fatal("expected entry to be found")
+	}
+	if !fresh {
+		t.Error("entry just inserted should be fresh")
+	}
+	if e.IP != "10.0.0.1" {
+		t.Errorf("IP: got %q, want %q", e.IP, "10.0.0.1")
+	}
+}
+
+func TestGetByShortcut_MatchStale(t *testing.T) {
+	c := New("", 1) // 1 second TTL
+	stale := Entry{Name: "web01.example.com", IP: "10.0.0.1", Kind: "device", CachedAt: time.Now().Add(-2 * time.Second)}
+	c.mu.Lock()
+	c.entries["web01.example.com"] = stale
+	c.mu.Unlock()
+
+	normalize := func(s string) string {
+		if len(s) > len(".example.com") && s[len(s)-len(".example.com"):] == ".example.com" {
+			s = s[:len(s)-len(".example.com")]
+		}
+		return s
+	}
+
+	_, found, fresh := c.GetByShortcut("web01", normalize)
+	if !found {
+		t.Fatal("expected entry to be found even when stale")
+	}
+	if fresh {
+		t.Error("entry older than TTL should not be fresh")
+	}
+}
+
+func TestGetByShortcut_NotFound(t *testing.T) {
+	c := New("", 3600)
+	c.Upsert(Entry{Name: "db01.example.com", IP: "10.0.0.2", Kind: "device"})
+
+	_, found, _ := c.GetByShortcut("web01", func(s string) string { return s })
+	if found {
+		t.Error("should not find an entry that does not match the shortcut")
+	}
+}
+
+func TestGetByShortcut_EmptyCache(t *testing.T) {
+	c := New("", 3600)
+	_, found, _ := c.GetByShortcut("web01", func(s string) string { return s })
+	if found {
+		t.Error("empty cache should return found=false")
+	}
+}
+
+func TestGetByShortcut_MultiDomain(t *testing.T) {
+	c := New("", 3600)
+	// Entry uses second domain (.example.de)
+	c.Upsert(Entry{Name: "web01.example.de", IP: "10.0.0.5", Kind: "vm"})
+
+	normalize := func(s string) string {
+		for _, suffix := range []string{".example.com", ".example.de"} {
+			if len(s) > len(suffix) && s[len(s)-len(suffix):] == suffix {
+				return s[:len(s)-len(suffix)]
+			}
+		}
+		return s
+	}
+
+	e, found, _ := c.GetByShortcut("web01", normalize)
+	if !found {
+		t.Fatal("should match entry with second configured domain")
+	}
+	if e.IP != "10.0.0.5" {
+		t.Errorf("IP: got %q, want %q", e.IP, "10.0.0.5")
+	}
+}
+
+// --- NeedsRefresh / SetRefreshed tests ---
+// These tests require NeedsRefresh(time.Duration) bool and SetRefreshed() error
+// to be implemented on *Cache. The refreshStamp field (path to the timestamp file)
+// must be set before calling these methods.
+
+func TestNeedsRefresh_NeverRefreshed(t *testing.T) {
+	dir := t.TempDir()
+	stampPath := filepath.Join(dir, "last_refresh")
+	c := New(filepath.Join(dir, "cache.json"), 3600)
+	c.refreshStamp = stampPath
+
+	if !c.NeedsRefresh(24 * time.Hour) {
+		t.Error("NeedsRefresh should return true when last_refresh file does not exist")
+	}
+}
+
+func TestNeedsRefresh_JustRefreshed(t *testing.T) {
+	dir := t.TempDir()
+	stampPath := filepath.Join(dir, "last_refresh")
+	c := New(filepath.Join(dir, "cache.json"), 3600)
+	c.refreshStamp = stampPath
+
+	if err := c.SetRefreshed(); err != nil {
+		t.Fatalf("SetRefreshed: %v", err)
+	}
+	if c.NeedsRefresh(24 * time.Hour) {
+		t.Error("NeedsRefresh should return false immediately after SetRefreshed")
+	}
+}
+
+func TestNeedsRefresh_Stale(t *testing.T) {
+	dir := t.TempDir()
+	stampPath := filepath.Join(dir, "last_refresh")
+	// Write a timestamp 25 hours ago
+	oldTime := time.Now().Add(-25 * time.Hour).Format(time.RFC3339)
+	if err := os.WriteFile(stampPath, []byte(oldTime), 0o644); err != nil {
+		t.Fatalf("writing stamp: %v", err)
+	}
+
+	c := New(filepath.Join(dir, "cache.json"), 3600)
+	c.refreshStamp = stampPath
+
+	if !c.NeedsRefresh(24 * time.Hour) {
+		t.Error("NeedsRefresh should return true when last_refresh is older than duration")
+	}
+}
+
+func TestSetRefreshed_Roundtrip(t *testing.T) {
+	dir := t.TempDir()
+	stampPath := filepath.Join(dir, "last_refresh")
+	c := New(filepath.Join(dir, "cache.json"), 3600)
+	c.refreshStamp = stampPath
+
+	if err := c.SetRefreshed(); err != nil {
+		t.Fatalf("SetRefreshed: %v", err)
+	}
+
+	// Just refreshed: 24h window → not stale
+	if c.NeedsRefresh(24 * time.Hour) {
+		t.Error("NeedsRefresh(24h) should be false right after SetRefreshed")
+	}
+
+	// Zero duration: everything is stale
+	if !c.NeedsRefresh(0) {
+		t.Error("NeedsRefresh(0) should always return true")
+	}
+}
+
 // tempFile writes content to a temp file and returns its path.
 func tempFile(t *testing.T, content []byte) string {
 	t.Helper()

internal/config/config.go

@@ -10,10 +10,11 @@ import (
 )
 
 type Config struct {
-	NetBox   NetBoxConfig   `mapstructure:"netbox"`
-	Resolver ResolverConfig `mapstructure:"resolver"`
-	Cache    CacheConfig    `mapstructure:"cache"`
-	SSH      SSHConfig      `mapstructure:"ssh"`
+	NetBox    NetBoxConfig    `mapstructure:"netbox"`
+	Resolver  ResolverConfig  `mapstructure:"resolver"`
+	Cache     CacheConfig     `mapstructure:"cache"`
+	SSH       SSHConfig       `mapstructure:"ssh"`
+	Shortcuts ShortcutsConfig `mapstructure:"shortcuts"`
 }
 
 type NetBoxConfig struct {
@@ -35,6 +36,12 @@ type CacheConfig struct {
 
 type SSHConfig struct {
 	DefaultUser string `mapstructure:"default_user"`
+	DefaultPort int    `mapstructure:"default_port"`
+}
+
+type ShortcutsConfig struct {
+	Domains      []string `mapstructure:"domains"`
+	StripHyphens bool     `mapstructure:"strip_hyphens"`
 }
 
 // Path returns the canonical config file path.

internal/hook/hook.go

@@ -0,0 +1,101 @@
+package hook
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+const (
+	// Marker is the unique string used to detect an existing hook installation.
+	Marker = "netssh shell-init"
+	// Line is the full line written into the shell profile.
+	Line = "netssh shell-init  # netssh cache auto-refresh"
+)
+
+// ProfilePath returns the canonical shell profile path for the given shell name.
+func ProfilePath(shell string) (string, error) {
+	switch shell {
+	case "bash":
+		return filepath.Join(os.Getenv("HOME"), ".bashrc"), nil
+	case "zsh":
+		return filepath.Join(os.Getenv("HOME"), ".zshrc"), nil
+	case "fish":
+		configDir, err := os.UserConfigDir()
+		if err != nil {
+			configDir = filepath.Join(os.Getenv("HOME"), ".config")
+		}
+		return filepath.Join(configDir, "fish", "config.fish"), nil
+	default:
+		return "", fmt.Errorf("unsupported shell %q — supported: bash, zsh, fish", shell)
+	}
+}
+
+// ReloadNote returns the shell-specific hint for reloading the profile.
+func ReloadNote(profilePath string) string {
+	return "Reload with: source " + profilePath
+}
+
+// IsInstalled reports whether the hook marker is present in the profile file.
+// Returns false if the file does not exist or cannot be read.
+func IsInstalled(profilePath string) bool {
+	data, err := os.ReadFile(profilePath)
+	if err != nil {
+		return false
+	}
+	return strings.Contains(string(data), Marker)
+}
+
+// Install appends the hook line to the profile if it is not already present.
+// Returns (true, nil) when newly installed, (false, nil) when already present.
+// Creates the profile file (and any parent directories) if they do not exist.
+func Install(profilePath string) (installed bool, err error) {
+	if IsInstalled(profilePath) {
+		return false, nil
+	}
+	if err := os.MkdirAll(filepath.Dir(profilePath), 0o755); err != nil {
+		return false, fmt.Errorf("creating directory: %w", err)
+	}
+	f, err := os.OpenFile(profilePath, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0o644)
+	if err != nil {
+		return false, fmt.Errorf("opening profile: %w", err)
+	}
+	defer f.Close()
+	if _, err := fmt.Fprintf(f, "\n%s\n", Line); err != nil {
+		return false, err
+	}
+	return true, nil
+}
+
+// Uninstall removes the hook line from the profile.
+// Returns (true, nil) when removed, (false, nil) when the hook was not found.
+// Returns (false, nil) — not an error — when the file does not exist.
+func Uninstall(profilePath string) (removed bool, err error) {
+	data, err := os.ReadFile(profilePath)
+	if os.IsNotExist(err) {
+		return false, nil
+	}
+	if err != nil {
+		return false, fmt.Errorf("reading profile: %w", err)
+	}
+	content := string(data)
+	if !strings.Contains(content, Marker) {
+		return false, nil
+	}
+
+	var kept []string
+	for _, line := range strings.Split(content, "\n") {
+		if strings.Contains(line, Marker) {
+			continue
+		}
+		kept = append(kept, line)
+	}
+	// Collapse triple blank lines that the removal may leave.
+	cleaned := strings.ReplaceAll(strings.Join(kept, "\n"), "\n\n\n", "\n\n")
+
+	if err := os.WriteFile(profilePath, []byte(cleaned), 0o644); err != nil {
+		return false, fmt.Errorf("writing profile: %w", err)
+	}
+	return true, nil
+}

internal/hook/hook_test.go

@@ -0,0 +1,263 @@
+package hook_test
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+
+	"git.zb-server.de/Sebi/ssh-netbox-wrapper/internal/hook"
+)
+
+// --- ProfilePath ---
+
+func TestProfilePath_Bash(t *testing.T) {
+	orig := os.Getenv("HOME")
+	os.Setenv("HOME", t.TempDir())
+	defer os.Setenv("HOME", orig)
+
+	p, err := hook.ProfilePath("bash")
+	if err != nil {
+		t.Fatalf("ProfilePath(bash): %v", err)
+	}
+	if !strings.HasSuffix(p, ".bashrc") {
+		t.Errorf("bash profile should end with .bashrc, got %q", p)
+	}
+}
+
+func TestProfilePath_Zsh(t *testing.T) {
+	orig := os.Getenv("HOME")
+	os.Setenv("HOME", t.TempDir())
+	defer os.Setenv("HOME", orig)
+
+	p, err := hook.ProfilePath("zsh")
+	if err != nil {
+		t.Fatalf("ProfilePath(zsh): %v", err)
+	}
+	if !strings.HasSuffix(p, ".zshrc") {
+		t.Errorf("zsh profile should end with .zshrc, got %q", p)
+	}
+}
+
+func TestProfilePath_Fish(t *testing.T) {
+	dir := t.TempDir()
+	orig := os.Getenv("XDG_CONFIG_HOME")
+	os.Setenv("XDG_CONFIG_HOME", dir)
+	defer os.Setenv("XDG_CONFIG_HOME", orig)
+
+	p, err := hook.ProfilePath("fish")
+	if err != nil {
+		t.Fatalf("ProfilePath(fish): %v", err)
+	}
+	if !strings.HasSuffix(p, "config.fish") {
+		t.Errorf("fish profile should end with config.fish, got %q", p)
+	}
+}
+
+func TestProfilePath_UnknownShell(t *testing.T) {
+	if _, err := hook.ProfilePath("ksh"); err == nil {
+		t.Error("unknown shell should return an error")
+	}
+}
+
+// --- IsInstalled ---
+
+func TestIsInstalled_Present(t *testing.T) {
+	profile := writeProfile(t, hook.Line+"\n")
+	if !hook.IsInstalled(profile) {
+		t.Error("IsInstalled should return true when marker is present")
+	}
+}
+
+func TestIsInstalled_Absent(t *testing.T) {
+	profile := writeProfile(t, "export PATH=$PATH\n")
+	if hook.IsInstalled(profile) {
+		t.Error("IsInstalled should return false when marker is absent")
+	}
+}
+
+func TestIsInstalled_MissingFile(t *testing.T) {
+	if hook.IsInstalled("/nonexistent/path/.bashrc") {
+		t.Error("IsInstalled should return false for missing file")
+	}
+}
+
+// --- Install ---
+
+func TestInstall_Fresh(t *testing.T) {
+	profile := filepath.Join(t.TempDir(), ".bashrc")
+
+	installed, err := hook.Install(profile)
+	if err != nil {
+		t.Fatalf("Install: %v", err)
+	}
+	if !installed {
+		t.Error("should report installed=true on fresh install")
+	}
+	if !hook.IsInstalled(profile) {
+		t.Error("profile should contain the hook line after Install")
+	}
+}
+
+func TestInstall_Idempotent(t *testing.T) {
+	profile := filepath.Join(t.TempDir(), ".bashrc")
+
+	hook.Install(profile)
+	installed, err := hook.Install(profile)
+	if err != nil {
+		t.Fatalf("second Install: %v", err)
+	}
+	if installed {
+		t.Error("second Install should report installed=false")
+	}
+
+	data, _ := os.ReadFile(profile)
+	if count := strings.Count(string(data), hook.Marker); count != 1 {
+		t.Errorf("hook line should appear exactly once, got %d", count)
+	}
+}
+
+func TestInstall_CreatesProfileAndParentDirs(t *testing.T) {
+	profile := filepath.Join(t.TempDir(), "nested", "dir", ".zshrc")
+
+	if _, err := hook.Install(profile); err != nil {
+		t.Fatalf("Install should create missing directories: %v", err)
+	}
+	if _, err := os.Stat(profile); err != nil {
+		t.Error("profile file should have been created")
+	}
+}
+
+func TestInstall_PreservesExistingContent(t *testing.T) {
+	profile := writeProfile(t, "export PATH=$PATH:/usr/local/bin\n")
+
+	hook.Install(profile)
+
+	data, _ := os.ReadFile(profile)
+	content := string(data)
+	if !strings.Contains(content, "export PATH") {
+		t.Error("Install should not remove existing content")
+	}
+	if !strings.Contains(content, hook.Marker) {
+		t.Error("hook line should be appended")
+	}
+}
+
+func TestInstall_AppendedAtEnd(t *testing.T) {
+	profile := writeProfile(t, "existing line\n")
+	hook.Install(profile)
+
+	data, _ := os.ReadFile(profile)
+	lines := strings.Split(strings.TrimRight(string(data), "\n"), "\n")
+	last := lines[len(lines)-1]
+	if last != hook.Line {
+		t.Errorf("hook line should be the last line, got %q", last)
+	}
+}
+
+// --- Uninstall ---
+
+func TestUninstall_Removes(t *testing.T) {
+	profile := writeProfile(t, "export PATH=$PATH\n"+hook.Line+"\nexport FOO=bar\n")
+
+	removed, err := hook.Uninstall(profile)
+	if err != nil {
+		t.Fatalf("Uninstall: %v", err)
+	}
+	if !removed {
+		t.Error("should report removed=true")
+	}
+	if hook.IsInstalled(profile) {
+		t.Error("hook line should have been removed")
+	}
+}
+
+func TestUninstall_PreservesOtherContent(t *testing.T) {
+	profile := writeProfile(t, "export FOO=bar\n"+hook.Line+"\nexport BAZ=qux\n")
+
+	hook.Uninstall(profile)
+
+	data, _ := os.ReadFile(profile)
+	content := string(data)
+	if !strings.Contains(content, "export FOO=bar") {
+		t.Error("content before hook should be preserved")
+	}
+	if !strings.Contains(content, "export BAZ=qux") {
+		t.Error("content after hook should be preserved")
+	}
+}
+
+func TestUninstall_NotPresent(t *testing.T) {
+	profile := writeProfile(t, "export PATH=$PATH\n")
+
+	removed, err := hook.Uninstall(profile)
+	if err != nil {
+		t.Fatalf("Uninstall: %v", err)
+	}
+	if removed {
+		t.Error("should report removed=false when hook was not present")
+	}
+}
+
+func TestUninstall_MissingFile(t *testing.T) {
+	removed, err := hook.Uninstall("/nonexistent/.bashrc")
+	if err != nil {
+		t.Errorf("Uninstall on missing file should not error: %v", err)
+	}
+	if removed {
+		t.Error("should report removed=false for missing file")
+	}
+}
+
+func TestUninstall_CollapsesExtraBlankLines(t *testing.T) {
+	// blank line before hook + hook + blank line after = three consecutive newlines after removal
+	profile := writeProfile(t, "line1\n\n"+hook.Line+"\n\nline2\n")
+
+	hook.Uninstall(profile)
+
+	data, _ := os.ReadFile(profile)
+	if strings.Contains(string(data), "\n\n\n") {
+		t.Error("three consecutive blank lines should be collapsed after uninstall")
+	}
+}
+
+// --- Roundtrip ---
+
+func TestInstallUninstall_Roundtrip(t *testing.T) {
+	profile := writeProfile(t, "existing content\n")
+
+	hook.Install(profile)
+	if !hook.IsInstalled(profile) {
+		t.Fatal("should be installed after Install")
+	}
+
+	hook.Uninstall(profile)
+	if hook.IsInstalled(profile) {
+		t.Fatal("should not be installed after Uninstall")
+	}
+
+	data, _ := os.ReadFile(profile)
+	if !strings.Contains(string(data), "existing content") {
+		t.Error("original content should survive install+uninstall cycle")
+	}
+}
+
+// --- ReloadNote ---
+
+func TestReloadNote_ContainsPath(t *testing.T) {
+	note := hook.ReloadNote("/home/user/.bashrc")
+	if !strings.Contains(note, "/home/user/.bashrc") {
+		t.Errorf("ReloadNote should contain the profile path, got %q", note)
+	}
+}
+
+// --- helpers ---
+
+func writeProfile(t *testing.T, content string) string {
+	t.Helper()
+	f := filepath.Join(t.TempDir(), "profile")
+	if err := os.WriteFile(f, []byte(content), 0o644); err != nil {
+		t.Fatal(err)
+	}
+	return f
+}

internal/setup/wizard.go

@@ -20,10 +20,16 @@ func RunWizard(cfg *config.Config) error {
 	url := cfg.NetBox.URL
 	token := cfg.NetBox.Token
 	defaultUser := cfg.SSH.DefaultUser
+	defaultPort := ""
+	if cfg.SSH.DefaultPort > 0 {
+		defaultPort = strconv.Itoa(cfg.SSH.DefaultPort)
+	}
 	strategiesRaw := strings.Join(cfg.Resolver.Strategies, ", ")
 	subnets := strings.Join(cfg.Resolver.ManagementSubnets, ", ")
 	interfaceName := cfg.Resolver.InterfaceName
 	cacheTTL := strconv.Itoa(cfg.Cache.TTL)
+	shortcutDomains := strings.Join(cfg.Shortcuts.Domains, ", ")
+	stripHyphens := cfg.Shortcuts.StripHyphens
 
 	if strategiesRaw == "" {
 		strategiesRaw = "primary_ip"
@@ -62,6 +68,21 @@ func RunWizard(cfg *config.Config) error {
 				Title("Default SSH user").
 				Description("Leave empty to use your system user ($USER).").
 				Value(&defaultUser),
+			huh.NewInput().
+				Title("Default SSH port").
+				Description("Leave empty to use the standard port (22).").
+				Placeholder("22").
+				Value(&defaultPort).
+				Validate(func(s string) error {
+					if strings.TrimSpace(s) == "" {
+						return nil
+					}
+					n, err := strconv.Atoi(strings.TrimSpace(s))
+					if err != nil || n < 1 || n > 65535 {
+						return errors.New("must be a port number between 1 and 65535")
+					}
+					return nil
+				}),
 		).Title("SSH defaults"),
 
 		huh.NewGroup(
@@ -90,6 +111,18 @@ func RunWizard(cfg *config.Config) error {
 					return nil
 				}),
 		).Title("Resolver & cache"),
+
+		huh.NewGroup(
+			huh.NewInput().
+				Title("Domain suffixes").
+				Description("Comma-separated suffixes stripped for shortcuts, e.g. .example.com, .example.de\nAllows typing 'web01' instead of 'web01.example.com'.").
+				Placeholder(".example.com").
+				Value(&shortcutDomains),
+			huh.NewConfirm().
+				Title("Strip hyphens").
+				Description("When enabled, fsn1-web01.example.com can be accessed as fsn1web01.\nOnly works for hosts already in the cache.").
+				Value(&stripHyphens),
+		).Title("Shortcuts"),
 	)
 
 	if err := form.Run(); err != nil {
@@ -109,6 +142,11 @@ func RunWizard(cfg *config.Config) error {
 
 	ttl, _ := strconv.Atoi(cacheTTL)
 
+	port := 0
+	if p, err := strconv.Atoi(strings.TrimSpace(defaultPort)); err == nil {
+		port = p
+	}
+
 	var subnetList []string
 	for _, s := range strings.Split(subnets, ",") {
 		if s = strings.TrimSpace(s); s != "" {
@@ -116,6 +154,16 @@ func RunWizard(cfg *config.Config) error {
 		}
 	}
 
+	var domainList []string
+	for _, s := range strings.Split(shortcutDomains, ",") {
+		if s = strings.TrimSpace(s); s != "" {
+			if !strings.HasPrefix(s, ".") {
+				s = "." + s
+			}
+			domainList = append(domainList, s)
+		}
+	}
+
 	out := config.Config{
 		NetBox: config.NetBoxConfig{
 			URL:          strings.TrimRight(strings.TrimSpace(url), "/"),
@@ -124,6 +172,7 @@ func RunWizard(cfg *config.Config) error {
 		},
 		SSH: config.SSHConfig{
 			DefaultUser: strings.TrimSpace(defaultUser),
+			DefaultPort: port,
 		},
 		Resolver: config.ResolverConfig{
 			Strategies:        strategies,
@@ -133,6 +182,10 @@ func RunWizard(cfg *config.Config) error {
 		Cache: config.CacheConfig{
 			TTL: ttl,
 		},
+		Shortcuts: config.ShortcutsConfig{
+			Domains:      domainList,
+			StripHyphens: stripHyphens,
+		},
 	}
 
 	return save(out)
@@ -200,6 +253,22 @@ func save(cfg config.Config) error {
 	if cfg.SSH.DefaultUser != "" {
 		fmt.Fprintf(&b, "  default_user: %q\n", cfg.SSH.DefaultUser)
 	}
+	if cfg.SSH.DefaultPort > 0 {
+		fmt.Fprintf(&b, "  default_port: %d\n", cfg.SSH.DefaultPort)
+	}
+
+	if len(cfg.Shortcuts.Domains) > 0 || cfg.Shortcuts.StripHyphens {
+		b.WriteString("\nshortcuts:\n")
+		if len(cfg.Shortcuts.Domains) > 0 {
+			b.WriteString("  domains:\n")
+			for _, d := range cfg.Shortcuts.Domains {
+				fmt.Fprintf(&b, "    - %s\n", d)
+			}
+		}
+		if cfg.Shortcuts.StripHyphens {
+			b.WriteString("  strip_hyphens: true\n")
+		}
+	}
 
 	if err := os.WriteFile(path, []byte(b.String()), 0o600); err != nil {
 		return fmt.Errorf("writing config: %w", err)

internal/setup/wizard_test.go

@@ -116,6 +116,148 @@ func TestSave_CreatesConfigDir(t *testing.T) {
 	}
 }
 
+func TestSave_DefaultPort(t *testing.T) {
+	dir := t.TempDir()
+	orig := os.Getenv("XDG_CONFIG_HOME")
+	os.Setenv("XDG_CONFIG_HOME", dir)
+	defer os.Setenv("XDG_CONFIG_HOME", orig)
+
+	cfg := config.Config{
+		NetBox: config.NetBoxConfig{URL: "http://x", Token: "t", TokenVersion: 1},
+		Cache:  config.CacheConfig{TTL: 60},
+		SSH:    config.SSHConfig{DefaultPort: 2222},
+	}
+	if err := save(cfg); err != nil {
+		t.Fatalf("save: %v", err)
+	}
+
+	data, _ := os.ReadFile(filepath.Join(dir, "netssh.yaml"))
+	if !strings.Contains(string(data), "default_port: 2222") {
+		t.Errorf("expected default_port: 2222 in config, got:\n%s", string(data))
+	}
+}
+
+func TestSave_Shortcuts_WritesSection(t *testing.T) {
+	dir := t.TempDir()
+	orig := os.Getenv("XDG_CONFIG_HOME")
+	os.Setenv("XDG_CONFIG_HOME", dir)
+	defer os.Setenv("XDG_CONFIG_HOME", orig)
+
+	cfg := config.Config{
+		NetBox: config.NetBoxConfig{URL: "http://x", Token: "t", TokenVersion: 1},
+		Cache:  config.CacheConfig{TTL: 60},
+		Shortcuts: config.ShortcutsConfig{
+			Domains:      []string{".example.com"},
+			StripHyphens: true,
+		},
+	}
+	if err := save(cfg); err != nil {
+		t.Fatalf("save: %v", err)
+	}
+
+	data, _ := os.ReadFile(filepath.Join(dir, "netssh.yaml"))
+	content := string(data)
+	for _, want := range []string{"shortcuts:", "domains:", ".example.com", "strip_hyphens: true"} {
+		if !strings.Contains(content, want) {
+			t.Errorf("expected %q in config, got:\n%s", want, content)
+		}
+	}
+}
+
+func TestSave_OmitsDefaultPortWhenZero(t *testing.T) {
+	dir := t.TempDir()
+	orig := os.Getenv("XDG_CONFIG_HOME")
+	os.Setenv("XDG_CONFIG_HOME", dir)
+	defer os.Setenv("XDG_CONFIG_HOME", orig)
+
+	cfg := config.Config{
+		NetBox: config.NetBoxConfig{URL: "http://x", Token: "t", TokenVersion: 1},
+		Cache:  config.CacheConfig{TTL: 60},
+		SSH:    config.SSHConfig{DefaultPort: 0},
+	}
+	if err := save(cfg); err != nil {
+		t.Fatalf("save: %v", err)
+	}
+
+	data, _ := os.ReadFile(filepath.Join(dir, "netssh.yaml"))
+	if strings.Contains(string(data), "default_port") {
+		t.Errorf("default_port should be omitted when zero, got:\n%s", string(data))
+	}
+}
+
+func TestSave_OmitsShortcutsWhenEmpty(t *testing.T) {
+	dir := t.TempDir()
+	orig := os.Getenv("XDG_CONFIG_HOME")
+	os.Setenv("XDG_CONFIG_HOME", dir)
+	defer os.Setenv("XDG_CONFIG_HOME", orig)
+
+	cfg := config.Config{
+		NetBox:    config.NetBoxConfig{URL: "http://x", Token: "t", TokenVersion: 1},
+		Cache:     config.CacheConfig{TTL: 60},
+		Shortcuts: config.ShortcutsConfig{}, // empty
+	}
+	if err := save(cfg); err != nil {
+		t.Fatalf("save: %v", err)
+	}
+
+	data, _ := os.ReadFile(filepath.Join(dir, "netssh.yaml"))
+	if strings.Contains(string(data), "shortcuts:") {
+		t.Errorf("shortcuts section should be omitted when empty, got:\n%s", string(data))
+	}
+}
+
+func TestSave_Roundtrip_WithNewFields(t *testing.T) {
+	dir := t.TempDir()
+	orig := os.Getenv("XDG_CONFIG_HOME")
+	os.Setenv("XDG_CONFIG_HOME", dir)
+	defer os.Setenv("XDG_CONFIG_HOME", orig)
+
+	original := config.Config{
+		NetBox: config.NetBoxConfig{
+			URL:          "https://netbox.example.com",
+			Token:        "nbt_test",
+			TokenVersion: 2,
+		},
+		SSH: config.SSHConfig{
+			DefaultUser: "admin",
+			DefaultPort: 2222,
+		},
+		Resolver: config.ResolverConfig{
+			Strategies: []string{"primary_ip"},
+		},
+		Cache: config.CacheConfig{TTL: 3600},
+		Shortcuts: config.ShortcutsConfig{
+			Domains:      []string{".example.com", ".example.de"},
+			StripHyphens: true,
+		},
+	}
+
+	if err := save(original); err != nil {
+		t.Fatalf("save: %v", err)
+	}
+
+	loaded, err := config.Load()
+	if err != nil {
+		t.Fatalf("Load after save: %v", err)
+	}
+
+	if loaded.SSH.DefaultPort != original.SSH.DefaultPort {
+		t.Errorf("DefaultPort: got %d, want %d", loaded.SSH.DefaultPort, original.SSH.DefaultPort)
+	}
+	if len(loaded.Shortcuts.Domains) != len(original.Shortcuts.Domains) {
+		t.Errorf("Shortcuts.Domains length: got %d, want %d", len(loaded.Shortcuts.Domains), len(original.Shortcuts.Domains))
+	} else {
+		for i, d := range original.Shortcuts.Domains {
+			if loaded.Shortcuts.Domains[i] != d {
+				t.Errorf("Shortcuts.Domains[%d]: got %q, want %q", i, loaded.Shortcuts.Domains[i], d)
+			}
+		}
+	}
+	if loaded.Shortcuts.StripHyphens != original.Shortcuts.StripHyphens {
+		t.Errorf("StripHyphens: got %v, want %v", loaded.Shortcuts.StripHyphens, original.Shortcuts.StripHyphens)
+	}
+}
+
 func TestParseStrategies(t *testing.T) {
 	tests := []struct {
 		in   string

internal/shortcuts/shortcuts.go

@@ -0,0 +1,42 @@
+package shortcuts
+
+import (
+	"strings"
+
+	"git.zb-server.de/Sebi/ssh-netbox-wrapper/internal/config"
+)
+
+// Normalize strips configured domain suffixes and optionally hyphens from a hostname.
+// The result is lowercased for case-insensitive comparison.
+func Normalize(name string, cfg config.ShortcutsConfig) string {
+	s := strings.ToLower(name)
+	for _, domain := range cfg.Domains {
+		suffix := strings.ToLower(domain)
+		if !strings.HasPrefix(suffix, ".") {
+			suffix = "." + suffix
+		}
+		if strings.HasSuffix(s, suffix) {
+			s = s[:len(s)-len(suffix)]
+			break
+		}
+	}
+	if cfg.StripHyphens {
+		s = strings.ReplaceAll(s, "-", "")
+	}
+	return s
+}
+
+// MakeNormalizer returns a closure bound to cfg, suitable for Cache.GetByShortcut.
+func MakeNormalizer(cfg config.ShortcutsConfig) func(string) string {
+	return func(name string) string {
+		return Normalize(name, cfg)
+	}
+}
+
+// AliasName returns a shell-safe alias name for the given host.
+// It normalizes the name (strips configured domains and optionally hyphens) then
+// replaces any remaining dots with underscores so the result is a valid identifier.
+func AliasName(name string, cfg config.ShortcutsConfig) string {
+	s := Normalize(name, cfg)
+	return strings.ReplaceAll(s, ".", "_")
+}

internal/shortcuts/shortcuts_test.go

@@ -0,0 +1,80 @@
+package shortcuts_test
+
+import (
+	"testing"
+
+	"git.zb-server.de/Sebi/ssh-netbox-wrapper/internal/config"
+	"git.zb-server.de/Sebi/ssh-netbox-wrapper/internal/shortcuts"
+)
+
+func TestNormalize(t *testing.T) {
+	cfg := config.ShortcutsConfig{
+		Domains:      []string{".example.com", ".example.de"},
+		StripHyphens: true,
+	}
+
+	cases := []struct {
+		input string
+		want  string
+	}{
+		{"fsn1-web01.example.com", "fsn1web01"},
+		{"fsn1-web01.example.de", "fsn1web01"},
+		{"FSN1-WEB01.EXAMPLE.COM", "fsn1web01"},
+		{"fsn1-web01", "fsn1web01"},
+		{"web01.example.com", "web01"},
+		{"web01.other.com", "web01.other.com"}, // unknown domain not stripped
+	}
+
+	for _, c := range cases {
+		got := shortcuts.Normalize(c.input, cfg)
+		if got != c.want {
+			t.Errorf("Normalize(%q) = %q, want %q", c.input, got, c.want)
+		}
+	}
+}
+
+func TestNormalizeNoHyphenStrip(t *testing.T) {
+	cfg := config.ShortcutsConfig{
+		Domains:      []string{".example.com"},
+		StripHyphens: false,
+	}
+
+	got := shortcuts.Normalize("fsn1-web01.example.com", cfg)
+	want := "fsn1-web01"
+	if got != want {
+		t.Errorf("Normalize = %q, want %q", got, want)
+	}
+}
+
+func TestAliasName_WithDomainAndHyphens(t *testing.T) {
+	cfg := config.ShortcutsConfig{
+		Domains:      []string{".example.com"},
+		StripHyphens: true,
+	}
+	got := shortcuts.AliasName("fsn1-web01.example.com", cfg)
+	want := "fsn1web01"
+	if got != want {
+		t.Errorf("AliasName = %q, want %q", got, want)
+	}
+}
+
+func TestAliasName_DotReplacement(t *testing.T) {
+	cfg := config.ShortcutsConfig{
+		Domains: []string{".example.com"},
+	}
+	// "web01.other.com" — domain not stripped, remaining dots → underscores
+	got := shortcuts.AliasName("web01.other.com", cfg)
+	want := "web01_other_com"
+	if got != want {
+		t.Errorf("AliasName = %q, want %q", got, want)
+	}
+}
+
+func TestAliasName_NoConfig(t *testing.T) {
+	cfg := config.ShortcutsConfig{}
+	got := shortcuts.AliasName("web01.example.com", cfg)
+	want := "web01_example_com"
+	if got != want {
+		t.Errorf("AliasName = %q, want %q", got, want)
+	}
+}

internal/ssh/args.go

@@ -86,6 +86,19 @@ func ReplaceHost(args []string, destIdx int, newHost string) []string {
 	return result
 }
 
+// HasPortFlag reports whether a port was specified via -p in args.
+func HasPortFlag(args []string) bool {
+	for i, a := range args {
+		if a == "-p" && i+1 < len(args) {
+			return true
+		}
+		if len(a) > 2 && a[0] == '-' && a[1] == 'p' {
+			return true
+		}
+	}
+	return false
+}
+
 // HasUserFlag reports whether a user was specified via -l in args.
 // Used to avoid overriding an explicit -l with the configured default user.
 func HasUserFlag(args []string) bool {

internal/ssh/args_test.go

@@ -144,6 +144,37 @@ func TestHasUserFlag_LFlagAtEnd(t *testing.T) {
 	}
 }
 
+func TestHasPortFlag_FlagSeparated(t *testing.T) {
+	if !HasPortFlag([]string{"-p", "2222", "host"}) {
+		t.Error("should detect -p <port>")
+	}
+}
+
+func TestHasPortFlag_FlagAttached(t *testing.T) {
+	if !HasPortFlag([]string{"-p2222", "host"}) {
+		t.Error("should detect -p<port> (attached form)")
+	}
+}
+
+func TestHasPortFlag_NotPresent(t *testing.T) {
+	if HasPortFlag([]string{"-l", "admin", "host"}) {
+		t.Error("should not detect port flag when absent")
+	}
+}
+
+func TestHasPortFlag_EmptyArgs(t *testing.T) {
+	if HasPortFlag([]string{}) {
+		t.Error("empty args should return false")
+	}
+}
+
+func TestHasPortFlag_PAtEnd(t *testing.T) {
+	// -p at the very end with no value — should return false
+	if HasPortFlag([]string{"-p"}) {
+		t.Error("-p with no value should return false")
+	}
+}
+
 func assertParsed(t *testing.T, got *ParsedArgs, host, user string, destIdx int) {
 	t.Helper()
 	if got == nil {