SIP protocol support

modulename: nf_conntrack_sip.ko


Linux Kernel Configuration
└─>Networking support
└─>Networking options
└─>Network packet filtering framework (Netfilter)
└─>Core Netfilter Configuration
└─>SIP protocol support
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
SIP is an application-layer control protocol that can establish,
modify, and terminate multimedia sessions (conferences) such as
Internet telephony calls. With the nf_conntrack_sip and
the nf_nat_sip modules you can support the protocol on a connection
tracking/NATing firewall.

To compile it as a module, choose M here. If unsure, say N.

source code: