[PATCH net] Documentation: networking: ip-sysctl: Document src_valid_mark sysctl
From: Jay Vosburgh <hidden>
Date: 2021-02-09 01:38:02
Provide documentation for src_valid_mark sysctl, which was added
in commit 28f6aeea3f12 ("net: restore ip source validation").
Signed-off-by: Jay Vosburgh <redacted>
---
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