I had all connections allowed for VMWare. But it couldn’t connect.
The connections are all “unknown” ???
If I disable avast firewall, it can connect.
Also, it was always a NAT network.
Now I can only connect if it is set to Bridged.
What’s wrong with avast firewall?
I also got problems with Avast’s Firewall.
Bad Company 2(a game) can’t connect to the default servers, even though I can browse through servers, but when I click join it can’t join, I have then tried to disable Avast’s firewall and after this I could play.
I also tried to allow all connection for the .exe and everything - Didnt help… ???
PS. I switched to Avast! Free - Waiting to buy Avast! IS/PRO till they upgrade the Zero-Day/Hour threat protection/sandboxing. 
Regards,
Armin.
Hope Lukas help me much before I give up on avast firewall…