[final kaoss]

iirf.ini files appear to stand for Ionics Isapi Rewrite Filter. You can find more info about it here.
http://iirf.codeplex.com/wikipage?title=Examples

Here's a tool to import Mod-rewrite rules for use with iirf.ini files.
http://www.iis.net/learn/extensions/...drewrite-rules

Quotable:

Originally Posted by https://iirf.codeplex.com/discussions/277490

IIRF doesn't use .htaccess.

I don't know where you are getting web.config; I don't know what you intend to do with that. I think in IIS7 web.config might be the store for rewrite rules. This is not the case for IIRF or IIS6.

If you use IIRF., you must supply a file named IIRF.ini which contains the rewrite rules. The rules you must provide in IIRf.ini are close to, but not exactly the same as those used in the .htaccess. There are some features in Apache that are not available in IIS+IIRF, and .htaccess uses those features; you must remove those statements from IIRF.ini. As well, there are some things you will want in IIRF.ini, that are not provided in the htaccess.txt. Starting with htaccess.txt if I snip out the Apache-only parts and add in the IIRF-only parts, I get this set of rules, which ought to work: