kamailio/test/misc/cfg/mobile61.cfg

route{

	(src_ip=~'(dorian)|(ekina)|(terix)' & method=~'^inv') \
				forward(centauri.fokus.gmd.de);
	src_ip=~"^192\.168\.[0-9]{1,3}\.[0-9]{1,3}$"  \
				log(1,"msg. from a private network\n"); route(1);
	src_ip==0.0.0.0/0   log(1, " droping msg\n"); drop;
}

route[1]{
	src_ip==192.168.46.61  log("possible loop, dropping\n"); drop;
	(src_ip==192.168.46.0/24) log("routing with rt2\n");route(2); log("we're back\n");
	src_ip==0.0.0.0/0 log(1, "we'll drop this one too\n"); drop;
}

route[2]{
	(method=~'^ACK' and uri=~'.*fokus') forward("fox.iptel.org");
	! method=~'^INV' forward(193.175.135.179); /* dorian */
	method=~'.' log("spying...\n"); send(dorian,8000); \
						forward("fox.iptel.org");
}