Port forwarding for a Satisfactory server
Current Satisfactory (1.0 and later) listens on 7777, and that number has to be open twice: once for UDP, which moves the gameplay, and once for TCP, which the server API and the start of every handshake depend on. Miss either and you get the frustrating half-state where people can see the server but can never finish joining.
Your setup
Choose the firmware family rather than your exact model — every router in a family shares the same menus.
Out of the box it is 7777. If you changed that, use whatever you set in -Port= launch argument.
The local address of the computer that runs the server. Find it with ipconfig on Windows or ip addr on Linux; it will begin with 192.168, 10. or 172.
Open these
Your firmware takes ranges, so each line here is one rule.
- 7777 TCP
- 7777 UDP
7777UDPGame trafficAll gameplay runs over UDP on this port.7777TCPReliable messaging / APISatisfactory 1.0 added a TCP channel on the same port number for the server API and the initial handshake. Forward both protocols.
Old versions only
Recent versions never listen on these. They appear here only because outdated tutorials keep recommending them.
15777UDPLegacy queryOnly servers older than Update 6 use this. A current install does not need it.15000UDPLegacy beaconPre-Update 6 discovery beacon. Skip it on any modern build.
Do not open these
Good news: this game has no remote-admin port that could be exposed by mistake. Forward the ports on the left and stop there.
Step by step: your router
- 1
Give the server a fixed local IP
A forwarding rule targets a single local address. If the server comes back from a reboot with a new one, the rule quietly points at an empty address — which is how forwards seem to "break by themselves".
On this router:look for DHCP Reservation, Address Reservation, Static Lease or Manually Assigned IP
- 2
Open the router admin page
From a device on the same network, open one of these in a browser:
- 192.168.0.1
- 192.168.1.1
- 192.168.2.1
- 10.0.0.1
Almost always printed on a sticker on the router itself.
- 3
Find the port forwarding page
Port Forwarding, Virtual Server, NAT, Applications & Gaming, or Port Mapping
Vendors use at least six names for the same feature. Whatever it is called, the page you want is the one asking for a port, a protocol and a device on your network. If the external and internal port fields both exist, set them to the same number.
- 4
Create one rule per line
a description field, if there is one External / WAN / Public / Service port Internal / LAN / Private port Protocol Internal IP / Device / Server IP Satisfactory 7777 7777 TCP your server’s local IP Satisfactory 7777 7777 UDP your server’s local IP Use the same number for the external and internal port. You can make the external one different, but then every player has to connect on that new number, so keep them identical unless you have a specific reason not to.
- 5
Let the server through its own firewall
The router is now sending traffic to the right computer, but that computer can still turn it away. Windows Defender Firewall is the usual offender: it blocks a newly installed dedicated server by default, and from outside that is indistinguishable from a broken forward.
Take it with you
Satisfactory — port forwarding rules ------------------------------------ 7777 TCP -> <server local IP> 7777 UDP -> <server local IP>
Check whether it worked
Always test from outside your network. A connection from another device in the house proves nothing: that traffic stays on your LAN and never passes through the rule you just created.
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The usual mistake
Older write-ups, from before Update 6, add 15777 and 15000 to the list. Those numbers belonged to the retired query and beacon system, and today's builds never listen on them. Forwarding them is harmless apart from leaving two useless openings in your firewall — but if the server is unreachable, those two missing rules are not the cause.
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Skipping port forwarding
You can host straight from a player's own game, which uses the same ports but only exists while that player is in the game. A dedicated server is what keeps the world going on its own, and a rented one comes with its ports already open.