---
security:
  - |
    Add IPv6 disable option and make it configurable for user to disable IPv6
    when it's not used, this will descrease the risk of ipv6 attack.
    Both net.ipv6.conf.default.disable_ipv6 & net.ipv6.conf.all.disable_ipv6
    will be explicitly set to the default value (0) which is enabled.
