table inet test-table {
        set test-set {
                type ifname
                elements = { "dummy0" }
        }

        flowtable test-flowtable {
                hook ingress priority filter + 5
                devices = { dummy0 }
        }

        chain test-chain {
                type filter hook forward priority mangle; policy accept;
                iifname != @test-set return
                oifname != @test-set return
                ct state established ct packets > 20 flow add @test-flowtable counter packets 0 bytes 0
        }
}