DNSBL

Specify the name of one or more DNS blackhole servers.

Synopsis

The parameter(s) are expected to name one or more hostnames.

Scope

This directive is only available for use in the global (interchange.cfg) configuration file, and will affect all websites running under the Interchange installation.  It will not work in a website's local (catalog.cfg) configuration file. 

Description

This directive allows you to list the DNS blackhole servers that should be consulted in order to verify client IP address "validity".  This way, you can deny connections from known bad clients, such as connections from open proxy servers.

Many fraudulent credit card orders are placed from open proxy machines to hide the actual identity of the criminal, so denying access to open proxy visitors might be a good idea.  On the other hand, consulting one or more DNS blackhole servers for every incoming request will add a significant amount of time to the time Interchange takes to process those requests.

Example