I have the same problem: "Connection to Host failed"

I joined 1 time a Server and lost connection after few seconds and the "Connection to Host failed" starts again.

Yep same. It's absolutely ridiculous and is ruining this game for me.

Give this server a shot and see if you get through: 70.42.74.71:64100

connection to host failed is normally caused by your router/modem not letting you connect to the game check your port forwarding settings or software firewall.

Yeah, i have same problem. I can play 1-2 minutes on server, and im left the server.
Router: D-Link DIR-300
Firewall: Norton Internet Security 2011
Other games working fine.
Sorry for my bad english.

I don't get that, but the delay is terrible. You shoot, shoot and shoot again but inside of the killcam it shows you shooting all around them even though there is hit markers. Or get killed from 5feet back.

every now and then I can play multiplayer for more than five minutes by some act of god, only to find mountains of more bugs glitches and weird totally unexplainable nonsense. Most people have just stated the obvious and major problems, but there's a LOT of **** up stuff. Even if they do meet some of our "demands", they've got a **** of other stuff they gotta start fixing. Once people start being able to connect to the servers regularly they're just gonna see more disappointment. Oh, and I haven't even played the game THAT much, but I've run into bugs that're horrendously unexcusable not just in gameplay, but menus, queues, root files, scripting. Anyone with rudimentary computer knowledge can take a look at the core files and see this game was shipped UNFINISHED so much to the point it seems they just said, **** it, we'll finish it later...

Connection to the Server Has Been Lost errors is all I've been getting when attempting to join a multiplayer server.