ZyXEL g-2000 plusv2 Guia Do Utilizador

ZyXEL G-2000 Plus v2 User’s Guide

Chapter 11 Firewall Screens

161

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.

SSDP(UDP:1900)

Simple Service Discovery Protocol (SSDP) is a discovery service 

searching for Universal Plug and Play devices on your home network 

or upstream Internet gateways using UDP port 1900.

SSH(TCP/UDP:22)

Secure Shell Remote Login Program.

STRMWORKS(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.

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 53   Predefined Services (continued)