P-660HN-51 User’s Guide
285
Table 119 Examples of Services
NAME PROTOCOL PORT(S) DESCRIPTION
AH (IPSEC_TUNNEL) User-Defined 51 The IPSEC AH (Authentication Header)
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.
CU-SEEME TCP/UDP
TCP/UDP
7648
24032
A popular videoconferencing solution from
White Pines Software.
DNS TCP/UDP 53 Domain Name Server, a service that
matches web names (for instance
www.zyxel.com
) to IP numbers.
ESP (IPSEC_TUNNEL) User-Defined 50 The IPSEC ESP (Encapsulation Security
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
TCP
20
21
File Transfer Protocol, a program to enable
fast transfer of files, including large files that
may not be possible by e-mail.
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
e-commerce.
ICMP User-Defined 1 Internet Control Message Protocol is often
used for diagnostic purposes.
ICQ UDP 4000 This is a popular Internet chat program.
IGMP (MULTICAST) User-Defined 2 Internet Group Multicast Protocol is used
when sending packets to a specific group of
hosts.
IKE UDP 500 The Internet Key Exchange algorithm is used
for key distribution and management.
IMAP4 TCP 143 The Internet Message Access Protocol is used
for e-mail.
IMAP4S TCP 993 This is a more secure version of IMAP4 that
runs over SSL.
IRC TCP/UDP 6667 This is another popular Internet chat
program.
MSN Messenger TCP 1863 Microsoft Networks’ messenger service uses
this protocol.
NetBIOS TCP/UDP
TCP/UDP
TCP/UDP
TCP/UDP
137
138
139
445
The Network Basic Input/Output System is
used for communication between
computers in a LAN.
NEW-ICQ TCP 5190 An Internet chat program.
NEWS TCP 144 A protocol for news groups.
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