Samba port usage - SambaWiki
Port usage when Samba runs as DC Service Port protocol DNS 53 tcp/udp Kerberos 88 tcp/udp End Point Mapper (DCE/RPC Locator Service) 135 tcp NetBIOS Name Service 137 udp NetBIOS Datagram 138 udp NetBIOS Session 139 tcp LDAP 389 tcp/udp ......