Table 46 Commonly Used Services
SERVICE | DESCRIPTION |
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AOL’s Internet Messenger service, used as a listening port by ICQ. | |
|
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AUTH(TCP:113) | Authentication protocol used by some servers. |
|
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BGP(TCP:179) | Border Gateway Protocol. |
|
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BOOTP_CLIENT(UDP:68) | DHCP Client. |
|
|
BOOTP_SERVER(UDP:67) | DHCP Server. |
|
|
A popular videoconferencing solution from White Pines Software. | |
24032) |
|
DNS(UDP/TCP:53) | Domain Name Server, a service that matches web names (e.g. |
| www.zyxel.com) to IP numbers. |
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:20.21) | File Transfer Program, a program to enable fast transfer of files, |
| including large files that may not be possible by |
H.323(TCP:1720) | NetMeeting uses this protocol. |
|
|
HTTP(TCP:80) | Hyper Text Transfer Protocol - a client/server protocol for the world |
| wide web. |
HTTPS(TCP:443) | HTTPS is a secured http session often used in |
|
|
ICQ(UDP:4000) | This is a popular Internet chat program. |
|
|
IKE(UDP:500) | The Internet Key Exchange algorithm is used for key distribution and |
| management. |
IPSEC_TUNNEL(AH:0) | The IPSEC AH (Authentication Header) tunneling protocol uses this |
| service. |
IPSEC_TUNNEL(ESP:0) | The IPSEC ESP (Encapsulation Security Protocol) tunneling protocol |
| uses this service. |
IRC(TCP/UDP:6667) | This is another popular Internet chat program. |
|
|
MSN Messenger(TCP:1863) | Microsoft Networks’ messenger service uses this protocol. |
|
|
MULTICAST(IGMP:0) | Internet Group Multicast Protocol is used when sending packets to a |
| specific group of hosts. |
An Internet chat program. | |
|
|
NEWS(TCP:144) | A protocol for news groups. |
|
|
NFS(UDP:2049) | Network File System - NFS is a client/server distributed file service |
| that provides transparent file sharing for network environments. |
NNTP(TCP:119) | Network News Transport Protocol is the delivery mechanism for the |
| USENET newsgroup service. |
PING(ICMP:0) | Packet INternet Groper is a protocol that sends out ICMP echo |
| requests to test whether or not a remote host is reachable. |
POP3(TCP:110) | Post Office Protocol version 3 lets a client computer get |
| POP3 server through a temporary connection (TCP/IP or other). |
PPTP(TCP:1723) | |
| over public networks. This is the control channel. |
PPTP_TUNNEL(GRE:0) | |
| over public networks. This is the data channel. |
RCMD(TCP:512) | Remote Command Service. |
|
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Chapter 7 Wireless LAN | 143 |