Packet monitoring and filtering using .net?

[Bryan Fleming]

Hello,

I was considering purchasing a COM object to watch all of the inbound
traffic on my machine and then apply some filters. Then I thought
that .NET ought to be able to do this pretty easily.

Can anyone point me in the right direction on how to:

1.) view all of the inbound network activity on my machine
2.) Kill off connections that I don't want comming (IE, BY IP address)

I'm looking to make a simple firewall application.

I want to use .NET since most of the COM objects only support win 2k
and newer

thanks a ton,

- Bryan