Restricted Samba access on 8.0

I run a samba server at work using winbind and XFS/ACL's for auth and need to know which ports need to be open to only allow access to the SMB shares. I currently have 137-139 and 443 (both tcp & udp) open but always get the error "The network path was not found". Are there other ports that need to be open for access to work? Obviously if I open all ports I have access not only to the SMB shares but everything else as well. -- Ken Schneider unix user since 1989 linux user since 1994 SuSE user since 1998 (5.2)