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Jump to PostHi,
If you are trying to do a local firewall which protects the installed PC only (like ZoneAlarm) then you have to write a Network Filter Driver which is a kernel mode module like any device driver; and this can't be done on a .Net language.
If you want …
Jump to PostHi,
You can't write kernel mode device driver in managed code (C#, VB.Net) which is required to write network filter driver which can drop packets (main functionality of firewalls)
You can sniff network traffic on managed code using wrappers to native code (all in user mode) which would let …
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