MR5100 throttles download speed on ethernet upon using IP passthrough

Dear Barry56

Thanks for your kind reply, however your mentioned steps might help newbie users or basic home users who are dealing for first time with professional equipment like MR5100.

FYI, I did all my tests and I am now somehow sure that the throttling is caused by the firmware (NTGX55_12.04.18.00 and earlier) or limitation in netgear internal iptables firewall.

Also in below thread people complained the same:

https://community.netgear.com/t5/Cell-Service-Mobile-Hotspot/Slow-internet-with-ip-passthrough-mode-on-MR5200-M5-5G-device/m-p/1895384#M13856

I was going to do below on my router, but I am not sure if TTL is causing the throttling or not, as on router mode the hotspot is working without any issue even on ethernet, but immediately when moving to IP passthrough, limitation starts. And the back router is not edge router, I tested with several routers from Synology and Linksys.

echo "iptables -t mangle -I POSTROUTING -o rmnet_data+ -j TTL --ttl-set 64" > /etc/init.d/ttl.sh
echo "ip6tables -t mangle -I POSTROUTING -o rmnet_data+ -m hl ! --hl-eq 255 -j HL --hl-set 64" >> /etc/init.d/ttl.sh
chmod 755 /etc/init.d/ttl.sh

So please in case you know someone from support, kindly ping him to be in touch with me as my 90 days period expired and I can't open a case directly.

Thanks a lot