+config IP_NF_SIP
+ tristate "SIP protocol support (EXPERIMENTAL)"
+ depends on IP_NF_CONNTRACK && EXPERIMENTAL
+ help
+ SIP is an application-layer control protocol that can establish,
+ modify, and terminate multimedia sessions (conferences) such as
+ Internet telephony calls. With the ip_conntrack_sip and
+ the ip_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 Y.
+