Question 1

My Arma 3 server is running — why does it show as offline?

Accepted Answer

Arma servers use a short run of consecutive UDP ports, and queries are answered on a different one from the game itself. Players enter the game port; queries are answered on the port directly above. Forward the game port alone and the server can be joined but seen by no list and no checker. Arma puts other services on more ports in the same block, so one range rule is safer than several single entries.

Question 2

What ports need to be open for a Arma 3 server?

Accepted Answer

Forward the range instead of the one port and try again. If the query still fails, make sure the server has finished loading its mission and mods — a heavily modded server can take a long time before it answers, and BattlEye starting up adds more.

Check if your Arma 3 server is online

Check Arma 3 Server

The ports Arma 3 uses

Still offline? Try this

Rather not run the server yourself?