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daemons designed for usage with
<citerefentry><refentrytitle>inetd</refentrytitle><manvolnum>8</manvolnum></citerefentry>
to work unmodified with systemd socket
- activation.</para></listitem>
+ activation.</para>
+
+ <para>For IPv4 and IPv6 connections the <varname>REMOTE_ADDR</varname>
+ environment variable will contain the remote IP, and <varname>REMOTE_PORT</varname>
+ will contain the remote port. This is the same as the format used by CGI.
+ For SOCK_RAW the port is the IP protocol.</para></listitem>
</varlistentry>
<varlistentry>