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How to enable IPv6 addresses on a Plesk server?

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Alex Davydov
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Plesk for Linux kb: how-to ABT: Group A

Applicable to:

  • Plesk for Linux

Question

How to enable IPv6 addresses on a Plesk server?

Answer

Note: Applying this configuration requires administrative access. Consider contacting the Plesk administrator in case it is required.

To enable IPv6 addresses support on Plesk Server

  1. Log in to the server via SSH

  2. Create the following file /etc/sysctl.d/ipv6.conf:

    # touch /etc/sysctl.d/ipv6.conf

  3. Add the following lines into /etc/sysctl.d/ipv6.conf :

    CONFIG_TEXT: net.ipv6.conf.all.disable_ipv6=0
    net.ipv6.conf.default.disable_ipv6=0

  4. Apply the settings from the /etc/sysctl.d/ipv6.conf via the following command:

    # sysctl -w net.ipv6.conf.default.disable_ipv6=0
    # sysctl -w net.ipv6.conf.all.disable_ipv6=0

  5. Add required IPv6 addresses in Plesk UI via Tools & Settings > IP Addresses .

  6. To enable IPv6 for Plesk UI itself create a configuration file /etc/sw-cp-server/conf.d/ipv6_ports.inc and fill it with below content:

    CONFIG_TEXT: listen  [::]:8443 ipv6only=on ssl;
    listen  [::]:8880 ipv6only=on;

  7. Restart Plesk service:

    # service sw-cp-server restart

To disable IPv6 support follow the article How to disable IPv6 addresses on a Plesk server

Comments

4 comments

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    Luis Zubeldia

    also you must to disable bind lookup for ipv6. please add this howto in the article.

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  • Avatar
    Denis Bykov

    Hello @Luis Zubeldia.

    Disabling or enabling BIND lookups for IPv6 is a purely optional step and depends on the exact use case.
    It is not related to enabling IPv6 functionality for the system.

    In order to completely disable BIND lookups for IPv6, it is required to start BIND with "-4" option and enable "filter-aaaa-on-v4" in BIND configuration. It is not recommended by BIND developers though.
    Locations for configuration files where options should be specified may vary depending on the operating system. Please refer to BIND manual and the documentation for the operating system in use.

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    abcking

    Hi there,

    I did follow this tutorial, but the ipv6 connectivity still fail...

    I restart the server, tried to delete the ipv6 adresses and put it back again, but it didn't fix the problem...

    Any idea to solve the problem?

    Best regards

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    abcking

    PS : I'm using CentOS Linux 7.9.2009 (Core)‬, Plesk Obsidian 18.0.32

     

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