commit 97bfa927fae7362f8c11f70abe6f71dc7c31aa40 · pyrox.dev/nixpkgs

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nixos/doc/manual/configuration/firewall.section.md

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       # Firewall {#sec-firewall}

     

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       NixOS has a simple stateful firewall that blocks incoming connections

     

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       and other unexpected packets. The firewall applies to both IPv4 and IPv6

     

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       traffic. It is enabled by default. It can be disabled as follows:

     

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       ```nix

     

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       networking.firewall.enable = false;

     

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       ```

     

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       If the firewall is enabled, you can open specific TCP ports to the

     

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       outside world:

     

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       ```nix

     

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       networking.firewall.allowedTCPPorts = [ 80 443 ];

     

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       ```

     

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       Note that TCP port 22 (ssh) is opened automatically if the SSH daemon is

     

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       enabled (`services.openssh.enable = true`). UDP ports can be opened through

     

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       [`networking.firewall.allowedUDPPorts`](options.html#opt-networking.firewall.allowedUDPPorts).

     

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       To open ranges of TCP ports:

     

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       ```nix

     

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       networking.firewall.allowedTCPPortRanges = [

     

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         { from = 4000; to = 4007; }

     

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         { from = 8000; to = 8010; }

     

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       ];

     

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       ```

     

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       Similarly, UDP port ranges can be opened through

     

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       [`networking.firewall.allowedUDPPortRanges`](options.html#opt-networking.firewall.allowedUDPPortRanges).

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nixos/doc/manual/configuration/firewall.xml

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       <section xmlns="http://docbook.org/ns/docbook"

     

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                xmlns:xlink="http://www.w3.org/1999/xlink"

     

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                xmlns:xi="http://www.w3.org/2001/XInclude"

     

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                version="5.0"

     

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                xml:id="sec-firewall">

     

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        <title>Firewall</title>

     

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        <para>

     

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         NixOS has a simple stateful firewall that blocks incoming connections and

     

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         other unexpected packets. The firewall applies to both IPv4 and IPv6 traffic.

     

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         It is enabled by default. It can be disabled as follows:

     

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       <programlisting>

     

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       <xref linkend="opt-networking.firewall.enable"/> = false;

     

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       </programlisting>

     

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         If the firewall is enabled, you can open specific TCP ports to the outside

     

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         world:

     

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       <programlisting>

     

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       <xref linkend="opt-networking.firewall.allowedTCPPorts"/> = [ 80 443 ];

     

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       </programlisting>

     

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         Note that TCP port 22 (ssh) is opened automatically if the SSH daemon is

     

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         enabled (<option><xref linkend="opt-services.openssh.enable"/> =

     

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         true</option>). UDP ports can be opened through

     

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         <xref linkend="opt-networking.firewall.allowedUDPPorts"/>.

     

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        </para>

     

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        <para>

     

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         To open ranges of TCP ports:

     

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       <programlisting>

     

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       <xref linkend="opt-networking.firewall.allowedTCPPortRanges"/> = [

     

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         { from = 4000; to = 4007; }

     

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         { from = 8000; to = 8010; }

     

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       ];

     

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       </programlisting>

     

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         Similarly, UDP port ranges can be opened through

     

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         <xref linkend="opt-networking.firewall.allowedUDPPortRanges"/>.

     

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        </para>

     

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       </section>

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nixos/doc/manual/configuration/networking.xml

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        <xi:include href="../from_md/configuration/ssh.section.xml" />

     

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        <xi:include href="../from_md/configuration/ipv4-config.section.xml" />

     

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        <xi:include href="../from_md/configuration/ipv6-config.section.xml" />

     

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        <xi:include href="firewall.xml" />

     

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        <xi:include href="../from_md/configuration/firewall.section.xml" />

     

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        <xi:include href="wireless.xml" />

     

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        <xi:include href="ad-hoc-network-config.xml" />

     

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        <xi:include href="renaming-interfaces.xml" />

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nixos/doc/manual/from_md/configuration/firewall.section.xml

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       <section xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xml:id="sec-firewall">

     

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         <title>Firewall</title>

     

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         <para>

     

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           NixOS has a simple stateful firewall that blocks incoming

     

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           connections and other unexpected packets. The firewall applies to

     

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           both IPv4 and IPv6 traffic. It is enabled by default. It can be

     

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           disabled as follows:

     

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         </para>

     

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         <programlisting language="bash">

     

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       networking.firewall.enable = false;

     

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       </programlisting>

     

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         <para>

     

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           If the firewall is enabled, you can open specific TCP ports to the

     

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           outside world:

     

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         </para>

     

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         <programlisting language="bash">

     

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       networking.firewall.allowedTCPPorts = [ 80 443 ];

     

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       </programlisting>

     

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         <para>

     

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           Note that TCP port 22 (ssh) is opened automatically if the SSH

     

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           daemon is enabled

     

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           (<literal>services.openssh.enable = true</literal>). UDP ports can

     

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           be opened through

     

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           <link xlink:href="options.html#opt-networking.firewall.allowedUDPPorts"><literal>networking.firewall.allowedUDPPorts</literal></link>.

     

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         </para>

     

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         <para>

     

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           To open ranges of TCP ports:

     

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         </para>

     

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         <programlisting language="bash">

     

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       networking.firewall.allowedTCPPortRanges = [

     

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         { from = 4000; to = 4007; }

     

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         { from = 8000; to = 8010; }

     

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       ];

     

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       </programlisting>

     

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         <para>

     

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           Similarly, UDP port ranges can be opened through

     

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           <link xlink:href="options.html#opt-networking.firewall.allowedUDPPortRanges"><literal>networking.firewall.allowedUDPPortRanges</literal></link>.

     

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         </para>

     

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       </section>