What is the idea behind URL rewriting?

The idea behind URL Rewriting (for example: “mod_rewrite”) is to use a rule-based rewriting engine (based on a regular-expression parser) to rewrite requested URLs on the fly.

The URL Rewrite configurations may be setup in Acunetix WVS to support the proper crawling of such websites. The configuration may be done manually by defining custom rulesets and also by importing the rules directly from Apache httpd.conf or .htaccess files.