I'm actually having the same problem. This only happens when sourcemod is installed, the server works perfect with just Metamod:Source.
I thought maybe my firewall was blocking the gamedata update so I checked netstat:
Code:
Active Internet connections (w/o servers)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 10258 192.168.1.x:58153 forums.alliedmods.net:http ESTABLISHED
Active Internet connections (w/o servers)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 192.168.1.x:58153 forums.alliedmods.net:http TIME_WAIT
Active Internet connections (w/o servers)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 192.168.1.x:58153 forums.alliedmods.net:http TIME_WAIT
Active Internet connections (w/o servers)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 192.168.1.x:58153 forums.alliedmods.net:http TIME_WAIT
Active Internet connections (w/o servers)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 192.168.1.x:58153 forums.alliedmods.net:http TIME_WAIT
Sure enough it was trying to connect to alliedmods for something. I tried to start the server again with iptables disabled and the same thing happens.
I also tried downgrading to Sourcemod 1.3.8 but that didn't fix anything.