We are about to begin a little project that has the following requiremnet.
Perform IP packet filtering in the following way :
i) look at an ip packet header. If some conditions are met let the packet pass
otherwise reject the packet.
ii) Look at ip packet headers of established connections and when certain
conditions are met tear down the connection.
Obviously this isn't the kind of thing we will be using the usual
firewall software, at least not as I understand the software. What I
want to know from you FreeBSD hackers is:
i) if anyone has done something similar do you have any advice.
ii) Anyone know where I should start hacking. Would it be best to try to
hack the firewall code or the ipforwarding code....
Any such advise would be helpful.
Alwyn Goodloe
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