FW: FW: a filter for tcp socket
But may be it is possible to use user's chains feature of iptables?
As I remember, the packet itself being transferred to
the user's chain where you can do what you want with it.
Correct me please if I am wrong.
> Did you hear about netfilter/iptables/ipchains etc?
> This is a firewall task, isn't it?
no it's not just a firewall task.
with firewall you can block, allow packets.
you can also change src dst ip or address but you can't
change data .