I checked my firewall rules, some say you have to put it in private net only. I tried that but didn't work, so i deactivated the firewall completely, nothing happened.
I tried to see if changing map on the server solved the issue, but no.
The server sees me as connected, but i'm on the waiting screen with control only of my cursor and can't use windows keys, shift-tab or ctrl-esc, just call the task manager with ctrl-alt-del and kill the process.
The only things happening while i was away the past months were a couple of updates of DCS and a couple of updates from Windows. Most of the users are still playing, so i tried to go back in time with Windows updates, deactivating the recent ones. Nothing again.
@EGG i'll try VPN too hoping it will solve it. The mistery continues :)