SIP packets filtering with iptables
Posted on Wed 22 January 2014 in VoIP • Tagged with iptables, netfilter, python, sip • Leave a comment
One of the most powerful iptables match is
the u32
module.
Using the u32 match you are able to write a firewall rule matching
against a single bit of a network packet.
If you wanna play with u32 module you have to be prepared to deal with a syntax very ...
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