With IIS Mod-Rewrite Pro you can manipulate URLs on the fly, make your website search engine friendly, make redirects, block specific URLs, block annoying robots and a lot more. IIS Mod-Rewrite is rule based and supports regular expressions. It is 100% compatible with apache mod_rewrite implementing all its features.

IIS Mod-Rewrite Pro supports per-server, per-virtual host, per-directory, and override (.htaccess) configurations, and it works with IIS 6.0 and 7.0. Also, it comes with a feature rich control panel that includes online updates, version rollback, diagnostics, regex tester, and a lot more settings and tools.

How it works

The URL manipulation mechanism of IIS Mod-Rewrite is rule based. When a requested URL matches a rule, the corresponding text substitution is performed on that URL.

Taking a deeper look, every rule is based on a regular expression, on which the input URL is tested. If a match occurs, then IIS Mod-Rewrite proceeds with the substitution of the URL. The substitution text consists of a combination of static and dynamic text strings. The inserted dynamic strings can be substrings of the matched URL (backreferences), server variables, or mapped values through lookup tables. This basic mechanism can be applied for a sequence of rules, using the output of one rule as the input of the next one.

Furthermore, a matched rule may depend on additional conditions. If those conditions are met, then the URL substitution is applied. For more information on conditions, regular expressions, rules and text substitution, you can see RewriteRule and RewriteCond commands.

Finally, additional features such as logging and key/value mapping functions make IIS Mod-Rewrite a powerful, feature rich, multi-purpose tool.

Configuration

The rewrite configuration is a script that forms a command set. This script resides in a plain text file that can be specified by using IIS Mod-Rewrite Control Center. IIS Mod-Rewrite engine checks that configuration file every 20 seconds, and every change is automatically applied.

Here are some key features of "IIS Mod-Rewrite Pro":

· Uses regular expressions for compact and rich configuration.
· Compatible syntax and behavior with Apache mod_rewrite (read more about compatibility).
· Supports per-server, per-virtual host, per-location, per-directory, and per-.htaccess configuration (the last three configuration scopes are supported only on IIS 6.0).
· Very high performance rewriting engine, written with pure, highly optimized C++ code.

Requirements:

· IIS 6.0

Limitations:

· The trial version will work in full function for a limited time (30 minutes, or 1000 requests, whichever is reached first), until your webserver is restarted.