NETGEAR CWGE111, User Manual

Page: 26 / 30

26 | Chapter 2: Advanced Configuration
CWGE111 802.11g WiFi Receiver User Manual
DMZ Host
Below the port forwarding table, is an option called DMZ Host. If you Enable this function,
your 802.11g WiFi Receiver becomes a DMZ device. You can enter an IP address, which will
be the IP address of the device exposed to the Internet.
The purpose of a DMZ is to make sure all external users can access any ports on the device,
so that users do not need to set up port forwarding, and Internet traffic can directly reach
internal devices.
The table below shows some well-known ports, which are officially registered with IANA.
Table 2-1.
Port Number Description Protocol
7 Echo TCP, UDP
21 FTP TCP
23 TELNET TCP
25 SMTP TCP, UDP
53 DNS TCP, UDP
79 Finger TCP
80 HTTP TCP, UDP
110 POP3 TCP
119 NNTP TCP
161 SNMP TCP, UDP
162 SNMP Trap TCP, UDP