Appendix C Services
WX Series User’s Guide
174
Table 48 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.