default iptables rules uses deprecated cmdline syntax When using iptables-1.4.5 with libvirt warnings appear: debug : virRun:827 : Command stderr: Using intrapositioned negation (`--option ! this`) is deprecated in favor of extrapositioned (`! --option this`). simple patch against src/util/iptables.c fixes it.. Reference Bugzilla ID: 533775 -Steve diff -ur libvirt/src/util/iptables.c libvirt-ipt/src/util/iptables.c --- libvirt/src/util/iptables.c 2009-11-08 20:57:08.458909225 -0800 +++ libvirt-ipt/src/util/iptables.c 2009-11-08 21:19:48.554615398 -0800 @@ -1067,7 +1067,7 @@ return iptablesAddRemoveRule(ctx->nat_postrouting, action, "--source", network, - "--destination", "!", network, + "!", "--destination", network, "--out-interface", physdev, "--jump", "MASQUERADE", NULL); @@ -1075,7 +1075,7 @@ return iptablesAddRemoveRule(ctx->nat_postrouting, action, "--source", network, - "--destination", "!", network, + "!", "--destination", network, "--jump", "MASQUERADE", NULL); }