ZyXEL Communications NBG-417N manual 254

Appendix E Services

Table 83 Examples of Services (continued)

NAME	PROTOCOL	PORT(S)	DESCRIPTION
FTP	TCP	20	File Transfer Program, a program to
	TCP	21	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	User-Defined	2	Internet Group Multicast Protocol is
(MULTICAST)			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	137	The Network Basic Input/Output
	TCP/UDP	138	System is used for communication
			between computers in a LAN.
	TCP/UDP	139
	TCP/UDP	445
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.

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NBG-417N User’s Guide