diff options
| -rw-r--r-- | man/systemd.network.xml | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/man/systemd.network.xml b/man/systemd.network.xml index 087e9e2156..c7e4db4e3c 100644 --- a/man/systemd.network.xml +++ b/man/systemd.network.xml @@ -358,7 +358,24 @@ the routing table. Takes either a boolean argument, or the values <literal>ipv4</literal> or <literal>ipv6</literal>, which only enables IP forwarding for the specified address - family.</para></listitem> + family. This controls the + <filename>net.ipv4.conf.<interface>.forwarding</filename> + and + <filename>net.ipv6.conf.<interface>.forwarding</filename> + sysctl options of the network interface (see <ulink + url="https://www.kernel.org/doc/Documentation/networking/ip-sysctl.txt">ip-sysctl.txt</ulink> + for details about sysctl options). Defaults to + <literal>no</literal>.</para> + + <para>Note: unless this option is turned on, no IP + forwarding is done on this interface, even if this is + globally turned on in the kernel, with the + <filename>net.ipv4.ip_forward</filename> and + <filename>net.ipv4.ip_forward</filename> sysctl + options. Also, if this option is enabled for at least one + interface, the global options in the kernel are also enabled + as necessary, to ensure IP forwarding can take place.</para> + </listitem> </varlistentry> <varlistentry> <term><varname>IPMasquerade=</varname></term> @@ -366,7 +383,8 @@ interface. If enabled packets forwarded from the network interface will be appear as coming from the local host. Takes a boolean argument. Implies - <varname>IPForward=yes</varname>.</para></listitem> + <varname>IPForward=yes</varname>. Defaults to + <literal>no</literal>.</para></listitem> </varlistentry> <varlistentry> <term><varname>Bridge=</varname></term> |