I am assuming you have a PPPoE connection? If so, please try adding the following line to /etc/sysconfig/network-scripts/ifcfg-ppp0 and any other ifcfg-pppX files:Saving the file will force the interface reset and start with the new configuration. If that works, to make it permanent, add a linesomewhere between line 1646 and 1668 to /usr/clearos/apps/network/libraries/Iface.php so the section reads something like:The line can be put just about anywhere in the block.