Editing File: /lib/firewalld/policies/allow-host-ipv6.xml

<?xml version="1.0" encoding="utf-8"?>
<policy target="CONTINUE" priority="-15000">
  <short>Allow host IPv6</short>
  <description>Allows basic IPv6 functionality for the host running firewalld.</description>
  <ingress-zone name="ANY" />
  <egress-zone name="HOST" />
  <rule family="ipv6">
    <icmp-type name="neighbour-advertisement" />
    <accept />
  </rule>
  <rule family="ipv6">
    <icmp-type name="neighbour-solicitation" />
    <accept />
  </rule>
  <rule family="ipv6">
    <icmp-type name="router-advertisement" />
    <accept />
  </rule>
  <rule family="ipv6">
    <icmp-type name="redirect" />
    <accept />
  </rule>
  <rule family="ipv6">
    <icmp-type name="mld-listener-done" />
    <accept />
  </rule>
  <rule family="ipv6">
    <icmp-type name="mld-listener-query" />
    <accept />
  </rule>
  <rule family="ipv6">
    <icmp-type name="mld-listener-report" />
    <accept />
  </rule>
  <rule family="ipv6">
    <icmp-type name="mld2-listener-report" />
    <accept />
  </rule>
</policy>

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