ZyXEL Communications NSA-220 User Manual
Appendix C Common Services
NSA-220 User’s Guide
188
FTP
TCP
TCP
TCP
20
21
21
File Transfer Program, a program to enable
fast transfer of files, including large files
that may not be possible by e-mail.
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.
server protocol for the world wide web.
HTTPS
TCP
443
HTTPS is a secured http session often
used in e-commerce.
used in e-commerce.
ICMP
User-Defined
1
Internet Control Message Protocol is often
used for diagnostic or routing purposes.
used for diagnostic or routing purposes.
ICQ
UDP
4000
This is a popular Internet chat program.
IGMP (MULTICAST) User-Defined
2
Internet Group Management Protocol is
used when sending packets to a specific
group of hosts.
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.
used for key distribution and management.
IRC
TCP/UDP
6667
This is another popular Internet chat
program.
program.
MSN Messenger
TCP
1863
Microsoft Networks’ messenger service
uses this protocol.
uses this protocol.
NEW-ICQ
TCP
5190
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.
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.
delivery mechanism for the USENET
newsgroup service.
PING
User-Defined
1
Packet INternet Groper is a protocol that
sends out ICMP echo requests to test
whether or not a remote host is reachable.
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 e-mail from a POP3 server
through a temporary connection (TCP/IP or
other).
computer get e-mail from a POP3 server
through a temporary connection (TCP/IP or
other).
PPTP
TCP
1723
Point-to-Point Tunneling Protocol enables
secure transfer of data over public
networks. This is the control channel.
secure transfer of data over public
networks. This is the control channel.
PPTP_TUNNEL
(GRE)
(GRE)
User-Defined
47
PPTP (Point-to-Point Tunneling Protocol)
enables secure transfer of data over public
networks. This is the data channel.
enables secure transfer of data over public
networks. This is the data channel.
RCMD
TCP
512
Remote Command Service.
REAL_AUDIO
TCP
7070
A streaming audio service that enables real
time sound over the web.
time sound over the web.
REXEC
TCP
514
Remote Execution Daemon.
RLOGIN
TCP
513
Remote Login.
RTELNET
TCP
107
Remote Telnet.
Table 59 Commonly Used Services (continued)
NAME
PROTOCOL
PORT(S)
DESCRIPTION