Hello.

Casey Schaufler wrote:
> Putting access control on ports rather than sockets is a novel
> approach. It is a lot simpler underneath and more consistant with
> the way other object name spaces are treated.
I prefer Novell's approach. It is easy like using iptables.

In TOMOYO Linux, I do in the following way.

allow_network TCP bind 192.168.1.17 8081 if task.uid=1017
allow_network UDP bind 192.168.1.17 8081 if task.uid=1017
allow_network TCP bind 192.168.1.26 8081 if task.uid=1026
allow_network UDP bind 192.168.1.26 8081 if task.uid=1026

I wish LSM has post-accept() and post-recvmsg() hooks.
Don't you think it's nice if administrator can limit
client's IP addresses and ports (even if tcp-wrappers
was bypassed due to buffer overflow) ?
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