I have set up a samba server all o.k. I cannot even view any workgroup. This is a result of internal security which I control. I was of the belief that Samba uses Netbios for transmitting and advertising on the LAN and have enabled TCP/UDP 137-139 on the required route 192.168.100.0/24 that the workstations are on that I want Samba services to be available. As I cannot see the workgroup I have obviously missed some other dependant Ports to Samba services. Can anyone tell me which Ports are required to be open. This has nothing to do the the PC firewall which is correctly displaying 'samba server' on the PC that is running the process and I have tried turning off all PC firewalls on the PC's which I want samba services to be available. If someone can let me know what Ports Samba requires I can correct the Internal Security issue. Many Thanks Scott