Hi,We have fresh Windows Server 2003 Enterprise R2 with all updates installed and configured as domain controller and application server. Hardware is Supermicro X7DVL-E with Intel (ESB2/Gilgal) 82563EB Dual-Port Gigabit Ethernet Controller (PRO/1000).Only one LAN port is usedwith static IP. The latest hardware drivers are installed.The problem is:We can not ping or connect with Remote Desktop or another other mean until we browse this machine in network (My Network Places/Entire Network/Microsoft Windows Network/domain/computer). After we connect like this, we can work a while, but when the machine's address is removed from ARP cache by timeout, we lose connection again.Like this: start pinging the machine getting "Request timeout", then open it in network browser and ping becomes normal immediately after I see the machine's shares.We have tried all possible configurations with Firewall and Routing and Remote Access on and off.I'm afraid we ran out of ideas. Can you please help?Regards,Alex

Hello,Do you have the same problem if you start the server in safe mode with network connection ?Laurent

I'm smelling a subnetting or routingissue here... Do the subnets match? Can you give me a basic description of the network topology between the two boxes? A+, Network+, MCSE (2000 \ 2003), MCTS, CISSP LinkedIn