On my Windows Server 2003 server, all incoming connections are dropped. I can see them getting in using Wireshark, but even a single ping from another computer fails.
All locally initiated connection work fine (I'm asking from the server). This server is the DC/DHCP/DNS/File server, so computer clients are in the dark.
I've run varius antivirus and removal tools without any luck. The Windows Firewall is disabled.
I'm wild-guessing at some virus/worm.
How can i check why these incoming ICMP/TCP SYN/etc are dropped?
Anyone has any knowledge about such situations?