eternal-terminal Module

The eternal-terminal module installs Eternal Terminal (ET) — a TCP-based remote shell that survives roaming and reconnects, for networks where mosh's UDP is blocked. Optional; disabled by default.

What it configures

abysslink up --apply (with the module enabled):

• Installs the ET package when either binary (et client or etserver) is missing
• Installs a user-level background service (dev.abysslink.etserver) running etserver --port 2022
  • Linux: ~/.config/systemd/user/dev.abysslink.etserver.service
  • macOS: ~/Library/LaunchAgents/dev.abysslink.etserver.plist
• Reminds you to grant tcp/2022 in the tailnet ACL (plan output)

ET rides on SSH for authentication; access is gated by the tailnet ACL like every other rig port.

Configuration

modules:
  eternal_terminal:
    enabled: true

enabled is the only key the schema accepts. The port (2022) is fixed.

abysslink doctor checks

Check	Failure behaviour
et_client_installed — et missing	fatal (doctor exits 2)
et_server_installed — etserver missing	fatal (doctor exits 2)
et_service_unit_installed — service unit not installed	warning (doctor exits 1)

Commands

abysslink enable eternal-terminal   # flip modules.eternal_terminal.enabled
abysslink up [--apply]              # install + service on tcp/2022
et user@my-rig.tail12345.ts.net     # connect from a tailnet device