Situation: The server 2003 can ping and access any computers in the LAN while no computers can access the server and ping it.
Troubleshooting:
1. Make sure No firewall running.
2. Make sure the ISA is disabled.
3. Make sure no IP filtering is enabled.
4. The server can ping it self.
5. Network Monitor displays that the NIC receiving and sending packets.
6. RRAS displays a red narrow down icon and Services show the RRAS is not running
Resolution: Enable and start RRAS and ISA. Note: the ISA must be started (if the ISA is installed) when starting RRAS.