Can't find each other in multiplayer lobbi and invite say "sever not responding"

[bardosy 158]

I create a new host in my arma3. Named and passworded and set the connection to internet from LAN, stay anything else on default (port: 2302). And create it.

My friend cannot see this server on the serverlist. Even if he filter the host name.

I tried to "invite" him in steam, but it said: "server not responding".

He tried to "join" me in steam, but it said: "server not responding".

We tried the remote tab too with my ip and 2302 port, but find nothing.

How is coop multiplayer work if we don't want to join a dedicated server?

[kbbw123 115]

you have to forward your ports, or use a DMZ in your router settings. there is also a new option if you host a mission but i don't know how i works as my router doesn't support it

[bardosy 158]

Thank you.

So it's unable to play coop multi without setting the router itself?

[bardosy 158]

One more question: if I have a router but front of the router there is a bridge between the internet and the router, I can plug my PC directly to the bridge (bypass the router), this could solve the problem? I guess a bridge cannot block a port...