
Historically assigned to the NIFTP-Based Mail protocol, but was never documented in the related IEN. The port number entry was removed from IANA's registry on. Despite this port being assigned by IANA, the service is meant to work on SPP (ancestor of IPX/SPX), instead of TCP/IP.

Xerox Network Systems (XNS) Authentication Protocol.

Xerox Network Systems (XNS) Clearinghouse (Name Server). Xerox Network Systems (XNS) Time Protocol. Historically used for Interface Message Processor logical address management,[ entry has been removed by IANA on TACACS Login Host protocol. TACACS+, still in draft which is an improved but distinct version of TACACS, only uses TCP 49. Palo Alto Networks' Panorama High Availability (HA) sync encrypted port. Simple Mail Transfer Protocol (SMTP), used for email routing between mail servers


Telnet protocol-unencrypted text communications Secure Shell (SSH), secure logins, file transfers (scp, sftp) and port forwarding Remote Job Entry was historically using socket 5 in its old socket form, while MIB PIM has identified it as TCP/5 and IANA has assigned both TCP and UDP 5 to it.įile Transfer Protocol (FTP) data transferįile Transfer Protocol (FTP) control (command) Both TCP and UDP have been assigned to TCPMUX by IANA, but by design only TCP is specified. In programming APIs (not in communication between hosts), requests a system-allocated (dynamic) port
