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D-Link DSL-520B ADSL2+ Modem User Manual
Section 7 - Device Info
DMZ Host
The demilitarized (DMZ) host feature allows one local computer to be exposed to the Internet. This function is applicable for:
• Users who want to use a special-purpose Internet service, such as an on-line game or video conferencing program, that is
not in the port forwarding list and for which no port range information is available.
• Users who are not concerned with security and wish to expose one computer to all services without restriction.
Note:
A DMZ host is not protected by the firewall and may be vulnerable to attack. This may also put other computers in the home
network at risk. Hence, when designating a DMZ host, you must consider the security implications and and take the appropriate
precautions.
You can set up a client in your local network as a DMZ host. Your device then forwards all incoming data traffic from the
Internet to this client. You can, for example, operate your own Web server on one of the clients in your local network and make
it accessible to Internet users. As the exposed host, the local client is directly visible to the Internet and therefore particularly
vulnerable to attacks (for example, hacker attacks). Enable this function only when necessary (for example, to operate a Web
server) and when other functions (for example, port forwarding) are inadequate. In this case, you should take appropriate
measures for the clients concerned.
Note:
Only one PC per public IP address can be set up as an exposed host.
Summary of Contents for DSL-520B
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