SSH

22

Secure Shell *

HTTP

80

HyperText Transfer Protocol * (e.g. for web browsing). Currently (2003-07-05) HTTP/1.1 is officially described in RFC 2616.

HOSTS2 Name Server

81

81

* An interesting story. The name attached to this port in the IANA list, Earl Killian, says he shouldn't be. He says "I don't know what 81 is, or whether it is still in use." Since Mr. Killian doesn't know what HOSTS2 is/was, and with Postel gone, I wonder if there's anyone left in the world who knows what 81 was/is for and who actually requested it.

XFER Utility

82

82

* Another interesting story. The name attached to this port in the IANA list, Thomas M. Smith of Lockheed Martin, says Sorry... there is no publicly available information regarding the details of the XFER Utility and its use of tcp and udp port # 82. XFER employs a proprietary protocol which has not been disclosed.

RPC Endpoint Mapper

135

135

* registered as "epmap - DCE endpoint resolution". Used by Microsoft for RPC locator service. See additional information.

LDAP

389

389

Lightweight Directory Access Protocol *

MS NetMeeting

LDAP or ULP, dyn >=1024, 1503, H.323 HostCall, MS ICCP

dyn >=1024

videoconferencing

Timbuktu

1417-1420

407

remote control *

SLP

427

427

Service Location Protocol * Used by MacOS and NetWare.

HTTPs

443

secure HTTP (SSL) *

LPD / printer

515

515

printing * LPD stands for Line Printer Daemon. Also see printing section.