Garry's Mod Server Won't Connect – Port 27015, SRCDS & Workshop

Quick answer: GMod connection issues: port 27015, sv_lan 0, workshop addons and enough startup time (addons load 2–5 min).

If you landed here: Garry's Mod shows "Connection failed", "Server not responding" or hangs on loading.

Frequently asked questions (FAQ)

Which port for Garry's Mod server?

27015 UDP/TCP (default SRCDS). Open in panel and firewall. Adjust in start.sh for custom port.

GMod "Server is not responding"?

Server still starting (addons take time), port blocked or sv_lan 0 not set.

Workshop addons cause connection issues?

Yes – missing addons on client = download on join. Too many large addons = timeout. Test with fewer addons.

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