ZyXEL Communications P-2900-4HB User Manual

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Appendix C Common Services

P-2900-4HB User’s Guide

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PPTP(TCP:1723)

Point-to-Point Tunneling Protocol enables secure transfer of
data over public networks. This is the control channel.

PPTP_TUNNEL(GRE:0)

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.

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)

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.

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.

Table 24 Commonly Used Services

SERVICE

DESCRIPTION