From: Jay Vosburgh Date: Tue, 9 Feb 2021 01:37:01 +0000 (-0800) Subject: Documentation: networking: ip-sysctl: Document src_valid_mark sysctl X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=8cf5d8cc3eae2a6324ff81aa5f2f6c2f52bc5cd0;p=linux.git Documentation: networking: ip-sysctl: Document src_valid_mark sysctl Provide documentation for src_valid_mark sysctl, which was added in commit 28f6aeea3f12 ("net: restore ip source validation"). Signed-off-by: Jay Vosburgh Signed-off-by: David S. Miller --- diff --git a/Documentation/networking/ip-sysctl.rst b/Documentation/networking/ip-sysctl.rst index 83ff5158005af..581bfce86dca1 100644 --- a/Documentation/networking/ip-sysctl.rst +++ b/Documentation/networking/ip-sysctl.rst @@ -1446,6 +1446,25 @@ rp_filter - INTEGER Default value is 0. Note that some distributions enable it in startup scripts. +src_valid_mark - BOOLEAN + - 0 - The fwmark of the packet is not included in reverse path + route lookup. This allows for asymmetric routing configurations + utilizing the fwmark in only one direction, e.g., transparent + proxying. + + - 1 - The fwmark of the packet is included in reverse path route + lookup. This permits rp_filter to function when the fwmark is + used for routing traffic in both directions. + + This setting also affects the utilization of fmwark when + performing source address selection for ICMP replies, or + determining addresses stored for the IPOPT_TS_TSANDADDR and + IPOPT_RR IP options. + + The max value from conf/{all,interface}/src_valid_mark is used. + + Default value is 0. + arp_filter - BOOLEAN - 1 - Allows you to have multiple network interfaces on the same subnet, and have the ARPs for each interface be answered