Hi, Thanks a lot for your quick reply! I thought that Zorp 3.3 already exists because I saw press releases for the commercial version and some files in the download section named with 3.3. But ok, then it's clear why it would not install ;) I would be glad for any code or tutorial that could help me in checking POST data and controlling the response. Performance is not the problem because it's just for a very small amount of users and running on a dedicated server. I saw you've written something about AnyPy-proxy here (seems to be also a scenario with POST data) https://lists.balabit.hu/pipermail/zorp-hu/2007-May/002248.html but unfortunately I don't understand a word and online translator programs make it even less understandable ;) Generally, I would prefer the program stacking for checking POST data and responses through an external program instead of using custom python code. Do you know how long it will approximately take until the program stacking feature is released under GPL? I don't want to rush you and I'm very glad and thankful that Zorp is released in a GPL version and you're investing your valuable time in adding features to the GPL version. Unfortunately I've only a limited time frame until end of July to get this running and so I would need to look for a different temporary solution (either through AnyPy or through Squid, Snort_inline or so...) if it's released later and come back to Zorp when this feature is available... Thomas Wenz -- Psssst! Schon vom neuen GMX MultiMessenger gehört? Der kann`s mit allen: http://www.gmx.net/de/go/multimessenger