ZyXEL Communications 91-009-073003B manual 843

			Appendix B Common Services
Table 284 Commonly Used Services (continued)
NAME	PROTOCOL	PORT(S)	DESCRIPTION
PPTP	TCP	1723	Point-to-Point Tunneling Protocol
			enables secure transfer of data over
			public networks. This is the control
			channel.
PPTP_TUNNEL	User-Defined	47	PPTP (Point-to-Point Tunneling
(GRE)			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.
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.

	843
ZyWALL USG 50 User’s Guide