What is “QM_Modules failure Error”?
The iptables init script tries to unload kernel modules, but however, it is not allowed to load/unload kernel modules inside a VPS due to which it gives the QM_Modules failure Error while restarting iptables, to solve QM_Modules failure Error simply follow the following steps carefully as a root user.
Rename the original /sbin/insmod to /sbin/insmod-ori file
mv /sbin/insmod /sbin/insmod-ori
Create the new symlink for a /bin/true to /sbin/insmod
ln -s /bin/true /sbin/insmod