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nixos/modules/tailscale/subnet-router.nix
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beatzaplentyandClaude Sonnet 4.6 e4b335be23
Check NixOS configurations / eval-hosts (pull_request) Successful in 10m37s
refactor(tailscale): rename exit-node to subnet-router; drop --advertise-exit-node
The host was always intended as a LAN subnet router (--advertise-routes),
not a full exit node (--advertise-exit-node). Rename every trace of
"exit-node" to "subnet-router" and remove the --advertise-exit-node flag
from extraSetFlags; the operator supplies --advertise-routes at first
tailscale up and Tailscale persists it in state across reboots.

Routing sysctls (useRoutingFeatures = "server"), openFirewall, and
trustedInterfaces = ["tailscale0"] are still required for subnet routing
to work, so the module is kept — just correctly named.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TF2dsuKZAiyZWQ1D7CuHJm
2026-07-25 14:53:28 +10:00

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Nix

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{
imports = [ ./enable-service.nix ];
services.tailscale = {
# Enables the sysctl forwarding settings subnet routers need;
# without this, --advertise-routes has no effect.
useRoutingFeatures = "server";
# Lets peers reach this node directly over the tailscale UDP port
# instead of relaying through DERP.
openFirewall = true;
};
}