I have a teamcity server installation with no firewall on the server. I have another machine with the build agent installed, again no firewall on that server either. netstat shows the agent machine is listening on the 9090 port. However, the server cannot make the rpc call. I am able to ping both machines from each other, I am able to access the team city server website from the agent machine. Everything checks out fine. There are absolutely no firewalls. Any ideas what's going on?