Article ID: 116352, created on Jun 27, 2013, last review on May 6, 2014

  • Applies to:
  • Plesk for Linux/Unix


Subscriptions that have been allocated only IPv6 address (no IPv4) may be inaccessible.


CentOS 5 kernel has problems with IPv6 support which causes ip6tables to reject any IPv6 connection.


Upgrade kernel to 2.6.20 or newer and restart the server.


Disable ip6tables:

service ip6tables stop
chkconfig ip6tables off

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