Running windows 2003 standard 32bit, SP1. Broadcom 1GBit. Machine has two NICs installed, one for the frontnet and one for the backnet. FrontNet has 2 public IPs and a public default gateway. For no known reason or cause the machine will stop responding on the public IP NIC when pinged from an outside address. When pinged from a machien on the same subnet there is a response and all is good. A closer look at ipconfig shows that there is no default gw assigned to the nic, but when I go into Control Panel and check there the default gateway is set. If I do a repair on the NIC via CP and then do another IPConfig the gateway is listed properly and the world is again a perfect place. There were no windows update, no changes to that machine between the time it was working and then not working. The machien allows HTTPS/HTTP traffic only via an SPI FW at the perimeter. Any ideas what causes and what the permanent fix may be? Thank you.