martian message

Hi everyone. 7.3, samba lan 7.3 server with some linux and some w98. The server is a DNS 192.168.0.1 Something has happened after we tried to install the firewall and now the server does not show on the clients although the clients can see each other. We have since disabled the firewall done a rcsmb restart rcnamed restart and rcsquid restart. The clients still cannot see the server (where all their files are and where the internet comes from). We get the message from the kernel as above coming from each of the clients connected. Thousands of them. We cannot ping the clients from the server either nor the server from the clients. HELP PLEASE! Steve.