[FS#4214] Netgear r6220 randomly disconnecting from ISP (Attachment added)

[OpenWrt Bugs]

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A new Flyspray task has been opened.  Details are below. 

User who did this - Nigel Reed (nelgin) 

Attached to Project - OpenWrt/LEDE Project
Summary - Netgear r6220 randomly disconnecting from ISP
Task Type - Bug Report
Category - Base system
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - Medium
Priority - Very Low
Reported Version - openwrt-21.02
Due in Version - Undecided
Due Date - Undecided
Details - Device: Netgear R6220 
Firmware: 20.02 snapshot r18400-f9782f5bcd

After the router has been up a while it will start to lose wan connectivity to my ISP (Frontier FiOS). I'm unable to ping the default gateway. Using my cellular data, I ssh to a remote server and ping the same gateway and it pings fine.

It's only down for a a few to 30 seconds and comes backup usually with the following message

   
Dec 30 01:07:02 gateway dnsmasq[304]: possible DNS-rebind attack detected: dns.msftncsi.com


There is no indication that the wan connection is down, and the lights don't change.

The ISP sent me a new router which I have now connected up and it's been stable. 

I've tried two different R6220 routers, since I have a spare, and that gave the same issues.



One or more files have been attached.

More information can be found at the following URL:
https://bugs.openwrt.org/index.php?do=details&task_id=4214

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