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| Appendix F Services | |
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| Table 116 Examples of Services |
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| NAME | PROTOCOL | PORT(S) | DESCRIPTION |
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| AH (IPSEC_TUNNEL) | 51 | The IPSEC AH (Authentication Header) |
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| tunneling protocol uses this service. |
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| AIM | TCP | 5190 | AOL’s Internet Messenger service. |
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| AUTH | TCP | 113 | Authentication protocol used by some |
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| servers. |
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| BGP | TCP | 179 | Border Gateway Protocol. |
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| BOOTP_CLIENT | UDP | 68 | DHCP Client. |
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| BOOTP_SERVER | UDP | 67 | DHCP Server. |
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| TCP/UDP | 7648 | A popular videoconferencing solution from |
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| TCP/UDP | 24032 | White Pines Software. |
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| DNS | TCP/UDP | 53 | Domain Name Server, a service that |
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| matches web names (for instance |
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| www.zyxel.com) to IP numbers. |
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| ESP | 50 | The IPSEC ESP (Encapsulation Security |
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| Protocol) tunneling protocol uses this |
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| service. |
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| FINGER | TCP | 79 | Finger is a UNIX or Internet related |
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| command that can be used to find out if a |
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| user is logged on. |
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| FTP | TCP | 20 | File Transfer Protocol, a program to enable |
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| TCP | 21 | fast transfer of files, including large files |
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| that may not be possible by |
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| 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. |
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| HTTPS | TCP | 443 | HTTPS is a secured http session often used |
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| ICMP | 1 | Internet Control Message Protocol is often |
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| used for diagnostic purposes. |
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| ICQ | UDP | 4000 | This is a popular Internet chat program. |
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| IGMP (MULTICAST) | 2 | Internet Group Multicast Protocol is used |
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| when sending packets to a specific group |
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| of hosts. |
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| IKE | UDP | 500 | The Internet Key Exchange algorithm is |
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| used for key distribution and management. |
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| IMAP4 | TCP | 143 | The Internet Message Access Protocol is |
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| used for |
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| IMAP4S | TCP | 993 | This is a more secure version of IMAP4 that |
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| runs over SSL. |
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| IRC | TCP/UDP | 6667 | This is another popular Internet chat |
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| program. |
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| MSN Messenger | TCP | 1863 | Microsoft Networks’ messenger service |
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| uses this protocol. |
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| NetBIOS | TCP/UDP | 137 | The Network Basic Input/Output System is |
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| TCP/UDP | 138 | used for communication between |
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| TCP/UDP | 139 |
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| TCP/UDP | 445 |
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| 287 |
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