-</programlisting>
- </example>
- </refsect2>
-
- <refsect2>
- <title>Multiple Listeners with Multiple Destinations</title>
- <para>When using namespaces, it may be useful to
- have multiple listeners with each going to a unique
- destination. systemd always passes sockets into
- services in the order specified in the socket
- unit, beginning with file descriptor 3.</para>
- <para>In this example, port <literal>80</literal>
- will proxy to <literal>localhost:8080</literal>,
- and port <literal>443</literal> will proxy to
- <literal>localhost:8443</literal>.</para>
- <example label="proxy socket unit">
- <title>/etc/systemd/system/multi-destination.socket</title>
- <programlisting>
-<![CDATA[[Socket]
-ListenStream=80
-ListenStream=443
-
-[Install]
-WantedBy=sockets.target]]>
-</programlisting>
- </example>
- <example label="proxy service unit">
- <title>/etc/systemd/system/multi-destination.service</title>
- <programlisting>
-<![CDATA[[Service]
-ExecStart=/usr/bin/socket-proxyd-multi-destination.sh
-PrivateTmp=true
-PrivateNetwork=true]]>
-</programlisting>
- </example>
-
- <example label="shell script">
- <title>
- /usr/bin/socket-proxyd-multi-destination.sh</title>
- <programlisting>
-<![CDATA[#!/bin/sh
-/usr/bin/systemd-socket-proxyd --listener=3 localhost:8080 &
-/usr/bin/systemd-socket-proxyd --listener=4 localhost:8443 &
-wait]]>
-</programlisting>
- <para>Make it executable:</para>
- <programlisting>
-<![CDATA[chmod 755 /usr/bin/socket-proxyd-multi-destination.sh]]>
- </programlisting>
- </example>
-
- <example label="commands">
- <programlisting>
-<![CDATA[# systemctl enable multi-destination.socket
-# systemctl start multi-destination.socket
-$ curl http://localhost/
-$ curl https://localhost/]]>