ZyXEL g-2000 plusv2 사용자 가이드

ZyXEL G-2000 Plus v2 User’s Guide

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Chapter 11 Firewall Screens

FTP(TCP:20.21) 

File Transfer Program, a program to enable fast transfer of files, 

including large files that may not be possible by e-mail.

H.323(TCP:1720)

NetMeeting uses this protocol.

HTTP(TCP:80) 

Hyper Text Transfer Protocol – a client/server protocol for the world 

wide web.

HTTPS(TCP:443)

HTTPS is a secured http session often used in e-commerce.

ICQ(UDP:4000)

This is a popular Internet chat program.

IPSEC_ TRANSPORT /

TUNNEL(AH:0)

The IPSEC AH (Authentication Header) tunneling protocol uses this 

service.

IPSEC_TUNNEL(ESP:0)

The IPSEC ESP (Encapsulation Security Protocol) tunneling protocol 

uses this service.

IRC(TCP/UDP:6667)

This is another popular Internet chat program.

MSN Messenger (TCP:1863)

Microsoft Networks’ messenger service uses this protocol. 

MULTICAST(IGMP:0)

Internet Group Multicast Protocol is used when sending packets to a 

specific group of hosts.

NetBIOS(TCP/UDP:137~139, 

45)

NetBIOS (Network Basic Input/Output System) are TCP or UDP 

broadcast packets that enable a computer to connect to and 

communicate with a LAN.

NEWS(TCP:144) 

A protocol for news groups.

NFS(UDP:2049) 

Network File System – NFS is a client/server distributed file service 

that provides transparent file sharing for network environments.

NNTP(TCP:119) 

Network News Transport Protocol is the delivery mechanism for the 

USENET newsgroup service.

PING(ICMP:0)

Packet Internet Groper is a protocol that sends out ICMP echo 

requests to test whether or not a remote host is reachable.

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).

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.

ROADRUNNER(TCP/

UDP:1026)

This is Time Warner’s cable modem session management protocol. It 

handles authentication and dynamic addressing.

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.

Table 53   Predefined Services (continued)