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nixos/release-notes: document conntrack helper changes

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Franz Pletz 2017-01-22 19:53:19 +01:00
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nixos/doc/manual/release-notes/rl-1703.xml
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@ -133,6 +133,19 @@ following incompatible changes:</para>
</para>
</listitem>
<listitem>
<para>
Autoloading connection tracking helpers is now disabled by default.
This default was also changed in the Linux kernel and is considered
insecure if not configured properly in your firewall. If you need
connection tracking helpers (i.e. for active FTP) please enable
<literal>networking.firewall.autoLoadConntrackHelpers</literal> and
tune <literal>networking.firewall.connectionTrackingModules</literal>
to suit your needs.
</para>
</listitem>
</itemizedlist>