:INPUT,FORWARD,OUTPUT -m connlabel --label "40";=;OK -m connlabel ! --label "40";=;OK -m connlabel --label "41" --set;=;OK -m connlabel ! --label "41" --set;=;OK -m connlabel --label "2048";;FAIL -m connlabel --label "foobar_not_there";;FAIL