ZyXEL NBG-416N Guia Do Utilizador

 Appendix E Services

NBG-416N User’s Guide

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.

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.

ROADRUNNER

TCP/UDP

1026

This is an ISP that provides services 
mainly for cable modems.

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

The Simple File Transfer Protocol is an 
old way of transferring files between 
computers.

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.

SMTPS

TCP

465

This is a more secure version of SMTP 
that runs over SSL.

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.

Table 69   Examples of Services (continued)