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Configuring Port Forwarding (Virtual Server)
This function allows you to automatically redirect common network services
to a specific machine behind the NAT firewall. These settings are only
necessary if you wish to host some sort of server like a web server or mail
server on the private local network behind the device's NAT firewall.
The most often used port numbers are shown in the following table.
About the other well-known ports, please search in
http://www.iana.org/assignments/port-numbers
.
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 is
Services Port
Number
ECHO 7
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
