Services
The following table lists some
•Name: This is a short, descriptive name for the service. You can use this one or create a different one, if you like.
•Protocol: This is the type of IP protocol used by the service. If this is TCP/UDP, then the service uses the same port number with TCP and UDP. If this is
•Port(s): This value depends on the Protocol.
•If the Protocol is TCP, UDP, or TCP/UDP, this is the IP port number.
•If the Protocol is USER, this is the IP protocol number.
•Description: This is a brief explanation of the applications that use this service or the situations in which this service is used.
Table 161 Examples of Services
NAME | PROTOCOL | PORT(S) | DESCRIPTION |
|
|
|
|
AH | 51 | The IPSEC AH (Authentication Header) | |
(IPSEC_TUNNEL) |
|
| tunneling protocol uses this service. |
AIM | TCP | 5190 | AOL’s Internet Messenger service. |
|
|
|
|
AUTH | TCP | 113 | Authentication protocol used by some |
|
|
| servers. |
BGP | TCP | 179 | Border Gateway Protocol. |
|
|
|
|
BOOTP_CLIENT | UDP | 68 | DHCP Client. |
|
|
|
|
BOOTP_SERVER | UDP | 67 | DHCP Server. |
|
|
|
|
TCP/UDP | 7648 | A popular videoconferencing solution from | |
| TCP/UDP | 24032 | White Pines Software. |
|
| ||
|
|
|
|
DNS | TCP/UDP | 53 | Domain Name Server, a service that |
|
|
| matches web names (e.g. www.zyxel.com) |
|
|
| to IP numbers. |
ESP | 50 | The IPSEC ESP (Encapsulation Security | |
(IPSEC_TUNNEL) |
|
| Protocol) tunneling protocol uses this |
|
|
| service. |
FINGER | TCP | 79 | Finger is a UNIX or Internet related |
|
|
| command that can be used to find out if a |
|
|
| user is logged on. |
FTP | TCP | 20 | File Transfer Program, a program to enable |
| TCP | 21 | fast transfer of files, including large files that |
| may not be possible by | ||
|
|
| |
H.323 | TCP | 1720 | NetMeeting uses this protocol. |
|
|
|
|
Appendix F Services | 327 |