ZyXEL N4100 Guia Do Utilizador

 Appendix E Common Services

N4100 User’s Guide

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. 

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.

Table 90   Commonly Used Services (continued)