From 8bdb5dc5b99a132640dad858361e1f805063be6c Mon Sep 17 00:00:00 2001 From: bol-van Date: Wed, 15 Dec 2021 13:01:51 +0300 Subject: [PATCH] Update readme.eng.md --- docs/readme.eng.md | 1 + 1 file changed, 1 insertion(+) diff --git a/docs/readme.eng.md b/docs/readme.eng.md index 540c1aa..035a000 100644 --- a/docs/readme.eng.md +++ b/docs/readme.eng.md @@ -185,6 +185,7 @@ add tcp option **MD5 signature**. All of them have their own disadvantages : Some adapters/switches/drivers enable hardware filtering of rx badsum not allowing it to pass to the OS. This behavior was observed on a Mediatek MT7621 based device. Tried to modify mediatek ethernet driver with no luck, likely hardware enforced limitation. + However the device allowed to send badsum packets, problem only existed for passthrough traffic from clients. * badsum doesn't work if your device is behind NAT which does not pass invalid packets. Linux NAT by default does not pass them without special setting `sysctl -w net.netfilter.nf_conntrack_checksum=0` Openwrt sets it from the box, other routers in most cases don't, and its not always possible to change it.