Disable IPv6 on CentOS6 OpenVZ

In order to disable ipv6, you will have to disable checkpoint/restore (suspend/resume/migrate functionality) as the modules vzrst and vzcpt have ipv6 as a dependancy.

  1. Edit /etc/init.d/vz, find and comment out this line:

    CPT_MODULES="vzcpt vzrst"

  2. Disable ipv6 module by creating /etc/modprobe.d/ipv6-off.conf

    alias net-pf-10 off
    alias ipv6 off

  3. Reboot.

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