After running the "Configure Remote access" wizard on SBS 2003 (and a reboot) I can only ping from the server to any PC, but not from any PC to the server. Network is in one direction. This SBS has only one NIC so no firewall on the SBS box. Can access any PC from the SBS and RDP to any PC, but not the other way round. So have no remote access. Will be travelling to the site in the morning.