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Thanks a lot Smilish. I have bought the winpkfilter driver and downloaded the trial version of TDI filter for NT platform. I know I’m not so technicaly strong in this area 🙁 . Can you please tell me 2 things.
1. How to identify underlaying services (e.g. http, dns. as per your sugession I need to trap DNS request only) request and modify the DNS request.
2. How to compare data in INTERMEDIATE_BUFFER as the data is in other format. In example PassThru we can block the packet based on data contents. But contents are not in readable format. I want to search a specific word within packet data if word found then drop this packet.
Thanks in advance..