When restarting the iptables on the Virtuozzo main node, the following error is occurred, nothing is changed on the main node but still following error is occur.
service iptables restart
Flushing firewall rules: [ OK ]
Setting chains to policy ACCEPT: nat mangle filter [ OK ]
Unloading iptables modules: FATAL: Module iptable_nat is in use.
FATAL: Module iptable_mangle is in use.
FATAL: Module iptable_filter is in use.
FATAL: Module ip_tables is in use.
FATAL: Module iptable_nat is in use.
FATAL: Module iptable_nat is in use.
FATAL: Module ip_nat is in use.
FATAL: Module xt_state is in use.
[FAILED]
[FAILED]
To resolve the above error message make sure that none of VPS is using the iptable on the main node because Module iptable_nat are used by the other VPSes and therefore it cannot be unloaded.
