Provide documentation for src_valid_mark sysctl, which was added
in commit 28f6aeea3f12 ("net: restore ip source validation").
Signed-off-by: Jay Vosburgh <jay.vosbu...@canonical.com>
---
Documentation/networking/ip-sysctl.rst | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/Documentation/networking/ip-sysctl.rst
b/Documentation/networking/ip-sysctl.rst
index fa544e9037b9..0fb39c895c95 100644
--- a/Documentation/networking/ip-sysctl.rst
+++ b/Documentation/networking/ip-sysctl.rst
@@ -1425,6 +1425,25 @@ 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
--
2.29.GIT
