customTitle: Connection error diagnosis request

initialLocation: panel

responderUsername: GitHub Copilot

remote-ssh

publisherDisplayName: Microsoft

extensionPublisherId: ms-vscode-remote

extensionDisplayName: Remote - SSH

description: Learn about Remote - SSH and diagnose connection issues

fullName: Remote - SSH

modes: agent ask edit

value:
### Diagnosis

Your last failure is **not** an SSH reachability/auth problem.
The SSH connection succeeds, then the remote bootstrap fails and times out.

Key evidence from your log:

- `Connection established.`
- `Authenticated ... using "none".`
- then: `unknown option: --fish`
- then: `Resolver error: ... timed out`

So the likely root cause is a **remote shell/config command** being invoked with an invalid `--fish` argument (often from remote shell init or SSH host config), which prevents the VS Code server startup script from running.

---

### What to check first

1. **Inspect `~/.ssh/config` host entry** (`line 14` in your log) for `atlas.tail...`
   Remove/fix anything that injects shell commands/options (especially `RemoteCommand`, custom wrappers, or anything passing `--fish`).

2. **Test the exact SSH command outside VS Code**:
```bash
ssh -v -T -D 46201 -o ConnectTimeout=15 atlas.tail4806cb.ts.net
```

3. **Test non-interactive remote command execution**:
```bash
echo 'echo hello' | ssh -v -T atlas.tail4806cb.ts.net
```

If this fails similarly, the issue is in remote shell startup/config.

4. In VS Code settings, try:
- `"remote.SSH.useExecServer": false`
- `"remote.SSH.useLocalServer": false`
- `"remote.SSH.showLoginTerminal": true`

Then retry connection to reveal hidden prompts/errors.

---

### Why timeout happened

The extension waited for server bootstrap output, but the remote side errored (`unknown option: --fish`) before startup completed, so it ended as **Timeout**.

text: @remote-ssh diagnose my last connection error

kind: agent

text: diagnose my last connection error

kind: text

kind: ask

vendor: copilot

tooltip: OpenAI Codex model specialized for code generation, debugging, and software development tasks. Rate is counted at 1x.

providerLabel: GitHub Copilot Chat

accountLabel: Breadway

label: Premium Models


k: inputState inputText

v: @remote-ssh the --fish is likf


description: Learn about Remote - SSH and diagnose connection issues

text: @remote-ssh the --fish is likely due to both my server and current device using fish


description: Learn about Remote - SSH and diagnose connection issues

message: Server error: 500

text: @remote-ssh the --fish is likely due to both my server and current device using fish


description: Learn about Remote - SSH and diagnose connection issues

value:
Yes — **fish can be involved**, but not simply because both sides use fish.

The key issue is likely that something in your SSH path is passing a literal `--fish` argument to a command that does not support it.

From your log:
- SSH auth succeeds.
- Then remote bootstrap prints `unknown option: --fish`.
- Then it times out.

### Most likely sources
- `~/.ssh/config` host entry (line 14 in your log), especially `RemoteCommand`, `ProxyCommand`, or wrapper scripts.
- Remote shell startup files (`~/.config/fish/config.fish`, `/etc/fish/config.fish`) running commands during non-interactive SSH sessions.

### Quick checks
1. Inspect host config:
```ssh-config
Host atlas.tail4806cb.ts.net
    # remove/test any RemoteCommand/ProxyCommand wrappers
```

2. Test raw SSH command outside VS Code:
```bash
ssh -v -T atlas.tail4806cb.ts.net
```

3. Test piped command (matches VS Code bootstrap style):
```bash
echo 'echo hello' | ssh -v -T atlas.tail4806cb.ts.net
```

4. In VS Code, try:
- `remote.SSH.useExecServer: false`
- `remote.SSH.useLocalServer: false`
- `remote.SSH.showLoginTerminal: true`

If you share your `Host atlas.tail...` SSH config block, I can point to the exact problematic line.

text: @remote-ssh the --fish is likely due to both my server and current device using fish


description: Learn about Remote - SSH and diagnose connection issues

text: @remote-ssh you can have a look

text: you can have a look


k: requests 2 result

message: Server error: 504