Appendix F Common Services
Table 49 Commonly Used Services (continued)
NAME | PROTOCOL | PORT(S) | DESCRIPTION |
FTP | TCP | 20 | File Transfer Program, a program to enable |
| TCP | 21 | fast transfer of files, including large files that |
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| may not be possible by |
H.323 | TCP | 1720 | NetMeeting uses this protocol. |
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HTTP | TCP | 80 | Hyper Text Transfer Protocol - a client/ |
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| server protocol for the world wide web. |
HTTPS | TCP | 443 | HTTPS is a secured http session often used |
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| in |
ICMP | 1 | Internet Control Message Protocol is often | |
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| used for diagnostic or routing purposes. |
ICQ | UDP | 4000 | This is a popular Internet chat program. |
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IGMP (MULTICAST) | 2 | Internet Group Management Protocol is | |
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| used when sending packets to a specific |
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| group of hosts. |
IKE | UDP | 500 | The Internet Key Exchange algorithm is |
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| used for key distribution and management. |
IRC | TCP/UDP | 6667 | This is another popular Internet chat |
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| program. |
MSN Messenger | TCP | 1863 | Microsoft Networks’ messenger service |
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| uses this protocol. |
TCP | 5190 | An Internet chat program. | |
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NEWS | TCP | 144 | A protocol for news groups. |
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NFS | UDP | 2049 | Network File System - NFS is a client/ |
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| server distributed file service that provides |
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| transparent file sharing for network |
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| environments. |
NNTP | TCP | 119 | Network News Transport Protocol is the |
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| delivery mechanism for the USENET |
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| newsgroup service. |
PING | 1 | Packet INternet Groper is a protocol that | |
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| sends out ICMP echo requests to test |
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| whether or not a remote host is reachable. |
POP3 | TCP | 110 | Post Office Protocol version 3 lets a client |
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| computer get |
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| through a temporary connection (TCP/IP or |
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| other). |
PPTP | TCP | 1723 | |
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| secure transfer of data over public |
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| networks. This is the control channel. |
PPTP_TUNNEL | 47 | PPTP | |
(GRE) |
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| enables secure transfer of data over public |
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| networks. This is the data channel. |
RCMD | TCP | 512 | Remote Command Service. |
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REAL_AUDIO | TCP | 7070 | A streaming audio service that enables real |
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| time sound over the web. |
REXEC | TCP | 514 | Remote Execution Daemon. |
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RLOGIN | TCP | 513 | Remote Login. |
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154 |
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