Known port assigments

ports is a searchable database for official and unofficial port assignments.

netbios-dgm 138 TCP IANA NETBIOS Datagram Service
netbios-dgm 138 UDP IANA NETBIOS Datagram Service
138 UDP - Directory Replication (MS Windows NT 4.0) http://support.microsoft.com/default.aspx?scid=kb;En-US;q150543
138 UDP - Logon Sequence (MS Windows NT 4.0) http://support.microsoft.com/default.aspx?scid=kb;En-US;q150543
138 UDP - NetLogon (MS Windows NT 4.0) http://support.microsoft.com/default.aspx?scid=kb;En-US;q150543
138 UDP - Pass Through Validation (MS Windows NT 4.0) http://support.microsoft.com/default.aspx?scid=kb;En-US;q150543
138 UDP - Printing (MS Windows NT 4.0) http://support.microsoft.com/default.aspx?scid=kb;En-US;q150543
138 UDP - Trusts (MS Windows NT 4.0) http://support.microsoft.com/default.aspx?scid=kb;En-US;q150543
138 UDP - WinNT Secure Channel (MS Windows NT 4.0) http://support.microsoft.com/default.aspx?scid=kb;En-US;q150543

9 results found

Please note: Some people seem to misunderstand the purpose of this site. ports is not a port scanner, ports will not test your host for vulnerabilities. ports is a simple database that contains known port assignments. Don't ask me whether your machine is infected by trojans, as I really don't know.