Arma II OA - Home Network's cannot play on same server

[semipr0 1]

Currently myself and two other home networks in my clan are unable to play Arma II OA or any associated mod if we attempt to log all the home user players on to the same server at the same time.

If I am logged on to an Arma II or DayZ server, and my wife logs in to play with me, I am immediately disconnected, when she gets to the server lobby, my user name is no longer even in the player list, even though I am still in client watching myself time out.

This is also happening to four other people in our clan that are playing Arma II OA and DayZ that share a public IP address from their ISP, and use home networking routers of several various types (Linksys/Netgear/D-Link). Only one player from each home network is able to access an internet server without causing problems. So of six people, we can only have three logged in on the same server, the other three can very easily play on another server, but we cannot all play together.

We have been pouring over the scant amount of possible work arounds and fixes for this. We've all attempted to set up the Arma 2 ports via port forwarding, this has achieved no results. We've attempted launching Arma 2 AO with the launcher flag of -port 2303 on one of the computers in the house hold, and that has not worked to allow both home computers to connect to the same server.

I've attempted disabling uPnP and many other suggestions and nothing seems to work. Even if I have the ports forwarded at our router, and assigned to specific IPv4 addresses on our router, so one IPv4 has 2302 - 2302 and the other has 2303 - 2303 specifically assigned to them as open ports, we cannot access the same server at the same time.

We have absolutely no issues playing other games on the exact same home networking set up, without even specifically forwarding ports to ensure we can.

So we're out of ideas on this end, and done just about everything Google can possibly suggest to try to play together, but it seems like Arma servers are demanding that each individual computer have its own individual public IP address, which is fine in the case of single users, but ridiculous if you consider that how many people on internet broad band are using some form of home networking.

[tarabas 10]

Bump same problem here.

[visceralsyn 10]

port range is 2302 ~2305

Disable UPnP garbage, leave the server default, set each clients port up 3, ie 2306+3, then the next client uses 2310+3.

...Syn...