table inet filter {
	ct helper sip-5060u {
		type "sip" protocol udp
		l3proto ip
	}

	ct helper sip-5060t {
		type "sip" protocol tcp
		l3proto ip
	}

	chain input {
		type filter hook input priority filter; policy accept;
		ct helper set ip protocol . th dport map { udp . 10000-20000 : "sip-5060u", tcp . 10000-20000 : "sip-5060t" }
	}
}