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142
AIM/New-ICQ
TCP
5190
AOL‘s Internet Messenger service. It is
also used as a listening port by ICQ.
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
7648
24032
A popular videoconferencing solution from
White Pines Software.
DNS
TCP/UDP
53
Domain Name Server, a service that
matches web names (for example
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 Program, 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
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143
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 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.
IKE
UDP
500
The Internet Key Exchange algorithm is
used for key distribution and management.
IRC
TCP/UDP
6667
This is another popular Internet chat
program.
MSN Messenger
TCP
1863
Microsoft Networks‘ messenger service
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.
NNTP
TCP
119
Network News Transport Protocol is the
delivery mechanism for the USENET
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144
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.
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).
PPTP
TCP
1723
Point-to-Point Tunneling Protocol enables
secure transfer of data over public
networks. This is the control channel.
PPTP_TUNNEL
(GRE)
User-Defined
47
PPTP (Point-to-Point Tunneling Protocol)
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.
REXEC
TCP
514
Remote Execution Daemon.
RLOGIN
TCP
513
Remote Login.
RTELNET
TCP
107
Remote Telnet.
RTSP
TCP/UDP
554
The Real Time Streaming (media control)
Protocol (RTSP) is a remote control for
multimedia on the Internet.
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145
SFTP
TCP
115
Simple File Transfer Protocol.
SMTP
TCP
25
Simple Mail Transfer Protocol is the
message-exchange standard for the
Internet. SMTP enables you to move
messages from one e-mail server to
another.
SNMP
TCP/UDP
161
Simple Network Management Program.
SNMP-TRAPS
TCP/UDP
162
Traps for use with the SNMP (RFC:1215).
SQL-NET
TCP
1521
Structured Query Language is an interface
to access data on many different types of
database systems, including mainframes,
midrange systems, UNIX systems and
network servers.
SSH
TCP/UDP
22
Secure Shell Remote Login Program.
STRM WORKS
UDP
1558
Stream Works Protocol.
SYSLOG
UDP
514
Syslog allows you to send system logs to a
UNIX server.
TACACS
UDP
49
Login Host Protocol used for (Terminal
Access Controller Access Control System).
TELNET
TCP
23
Telnet is the login and terminal emulation
protocol common on the Internet and in
UNIX environments. It operates over
TCP/IP networks. Its primary function is to
allow users to log into remote host
systems.
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146
TFTP
UDP
69
Trivial File Transfer Protocol is an Internet
file transfer protocol similar to FTP, but
uses the UDP (User Datagram Protocol)
rather than TCP (Transmission Control
Protocol).
VDOLIVE
TCP
7000
Another videoconferencing solution.

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