I have a WHR-HP-G54 which set the NAT for the Web (Port 80), FTP (Port 20,21) and Remote Desktop before . But after I restored my computer in this few days. Only the web service can work. The FTP and the remote desktop fail to connected. The internal IP and the Port No. same as before. I can connect it using the internal IP. The router doesn't has any error message in the NAT table, ever I deleted the original entry and then add a new one. Is it the hardware problem of the router ? As the wireless signal become unstable in the past few months, but the configuration and the firmware unchange.