P-2602R/RL-DxA Series User’s Guide
294 Appendix E Services
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.
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 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).
POP3S TCP 995 This is a more secure version of POP3 that
runs over SSL.
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.
Table 116 Examples of Services (continued)
NAME PROTOCOL PORT(S) DESCRIPTION
