I am having the same issues. I have been playing the game just fine until now. Now my friend can't join and we see each other's ping as 2500. Remote join won't work either. The problem happens on Steam and GameSpy. When I launch a game on Steam, my friend can only see it on the GameSpy server browser. Any other game works great and our connection is excellent. I have opened up ports 2302-2305 for Arma3,and 27016 for Steam on my router. I have verified files on Steam, re installed the game, re installed Steam. I have also tried using other programs like Hamachi. I also found many forums about this same issue happening with Arma 2 as well but I have yet to find one with a solution.

We cannot always see each other in the server browser. We can only see each other in the browser if we use Hamachi. Normally we cannot even see each other's game in the browser. We are creating the session in the game. Remote join will not work. Creating the session using the other ports like 2305 didn't work either. The problem started happening with the update that brought in the Steam server browser.

Also if you own Evolve apparently there's some sort of work around that lets you play Arma with your friends. You need both games running at the same time though.

I'm still angry at you.

I'm that guy who paid for that game you guys made...

Can Bohemia afford to make their own lobby system? Is it too hard? I don't know. How bad is this issue? Should I keep waiting or move on to other things? That's what I really want to know.

I have these ports open. I've had them open even before the problem started, just to make sure I had the best connection. I'm not about to DMZ. No one should have to do that for a game.

Ha! I'm the same boat. Now my buddies give me crap for recommending broken games. Now they keep trashing Arma lol.

Are we there yet?

A similar problem was happening with Arma 2. Maybe they know about it and can't fix it? Either way, squeaky wheel gets the grease.

What the hell, I didn't know I needed a degree in computer science to play this damn thing with friends.

This is not working for me either. Ports are open, game is still unblocked from any spyware and antivirus software. I don't know what else to do. I can only play on random servers. My friends and I cannot create games for us to play together.

Hamachi is not reliable. It has only worked once or twice with my group of friends.

Still encountering the same problems. Every day I wake up and try out a new solution I find on random forums. My connection and my PC have never been running so smooth. I still cannot connect with my friends and they can't with me. But we can all join random servers. At least some acknowledgement that the problem is being looked at would be nice. I've been seeing this problem come up on forums about arma2 and no solution. If this problem only affects a small group of people, would it get ignored? Are we screwed?

I am having the same issues. I have been playing the game just fine until now. Now my friend can't join and we see each other's ping as 2500. The problem happens on Steam and GameSpy. When I launch a game on Steam my friend can only see it on the GameSpy server browser. Any other game works great and our connection is excellent. I have opened up ports 2302-2305 for Arma3,and 27016 for Steam on my router. I have verified files on Steam, re installed the game, re installed Steam. I have also tried using other programs like Hamachi with no success. I also found many forums about this same issue happening with Arma 2 as well but I have yet to find one with a solution.

Edit:
We cannot always see each other in the server browser. We can only see each other in the browser if we use Hamachi. Normally we cannot even see each other's game in the browser. We are creating the session in the game. Remote join will not work. Creating the session using the other ports like 2305 didn't work either. The problem started happening with the update that brought in the Steam server browser.