Unturned / UPDATED May 14, 2026

Unturned Server Port Forwarding

Unturned dedicated servers use UDP port 27015 (game) and UDP 27016 (query). Only UDP is required — no TCP. This guide covers firewall rules, router NAT configuration, and GSLT requirements for browser listing.

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Unturned Server Port Forwarding

Unturned dedicated servers use only UDP — no TCP ports need to be opened for the game itself.

Required Ports

Port	Protocol	Purpose
27015	UDP	Game port — players connect here
27016	UDP	Steam query port — always Port+1 automatically

The query port is always the base port plus 1. If you change Port in Commands.dat to 27020, the query port becomes 27021.

Multiple servers on the same machine: Use non-overlapping port pairs: 27015/27016, 27017/27018, 27019/27020, etc.

Linux Firewall (ufw)

sudo ufw allow 27015/udp
sudo ufw allow 27016/udp
sudo ufw reload

Linux Firewall (iptables)

iptables -I INPUT -p udp --dport 27015 -j ACCEPT
iptables -I INPUT -p udp --dport 27016 -j ACCEPT

Windows Firewall

netsh advfirewall firewall add rule name="Unturned Game" dir=in action=allow protocol=UDP localport=27015
netsh advfirewall firewall add rule name="Unturned Query" dir=in action=allow protocol=UDP localport=27016

Router / NAT Port Forwarding

In your router admin panel, add UDP forwarding rules pointing to your server's static LAN IP:

External	Internal	Protocol
27015	27015	UDP
27016	27016	UDP

Assign a static LAN IP to the server machine so these rules remain valid after router reboots.

Appearing in the Server Browser

Opening ports alone is not enough for the server to appear in the public Unturned browser. You also need a Game Server Login Token (GSLT):

Visit https://steamcommunity.com/dev/managegameservers
Create a token for App ID 304930.
Add Login_Token <your-token> to Servers/<ServerName>/Server/Commands.dat.

Without a GSLT, your server is only reachable via direct IP connection.