Ok, I have a difficult question again. I've asked around, most people don't even understand what I want...
I am looking for a tool which allows me to see which decissions the tcp/ip stack takes in order to drop/allow a connection. Look at this example:
Laptop x with ip address x.x.x.x can connect to machine y. Laptop z with ip address z.z.z.z can connect to machine y, but machine y disconnects/drops the tcp connection sequence by sending a RST.
I want to know why the decission to sent a RST to laptop z is taken.
So I am looking for Unix and/or Windows software which gives me more insight in the above problem.
Anybody any idea? If you know of a place where I might post this question as well, let me know!