User's Manual

FTP (File Transfer Protocol) 21

Telnet 23

SMTP (Simple Mail Transfer Protocol) 25

DNS (Domain Name System) 53

Finger 79

HTTP (Hyper Text Transfer Protocol) 80

POP3 (Post Protocol) 110

NNTP (Network News Transport Protocol) 119

SNMP (Simple Network Management Protocol) 161

SNMP trap 162

SIP (Session Initiation Protocol) 5060

PPTP (Point-to-Point Tunneling Protocol) 1723

Multiple Servers behind NAT Example:

In this case, there are two PCs in the local network accessible for outside

users.

Internet

Device with Router Mode enabled

WLAN IP Address:192.168.2.254

AP Clinet 1

AP Client 2

Web Server

IP Address:192.168.2.1

Port:80

FTP Server

IP Address:192.168.2.2

Port:21

User

Configuring DMZ

A Demilitarized Zone is used to provide Internet services without

sacrificing unauthorized access to its local private network. Typically, the

DMZ host contains devices accessible to Internet traffic, such as Web

(HTTP ) servers, FTP servers, SMTP (e-mail) servers and DNS servers.

So that all inbound packets will be redirected to the computer you set. It

also is useful while you run some applications (ex. Internet game) that use

uncertain incoming ports.