Firmware Version V1.0.4.118_10.0.90 FIRMWARE ISSUE FOR ROUTER AC1750 SMART WIFI R6400V

[JGL991]

A week ago i logged onto router and updated the firmware with what was suggested by Netgear.  Ever since then, I keep having issues with DNS.  Every site I select from the list of search results comes up with a DNS error.  I do not understand why this firmware was released and why was it not tested extensively.  Does anyone know how to fix this, short of resetting router which I will not do since it is a pain in the ass to set up all that it is connected to?

[plemans · Accepted solution]

here's where you can get the firmware: R6400v2 | WiFi Router | NETGEAR Support

for older firmware, click on "view previous versions"

then just follow the manual firmware update process but use the older version you downloaded and not the newer. 

[plemans]

I'd downgrade to the version prior. Seems to resolve it for issues. 

I've seen multiple posts on here about recent upgrades breaking dns so I have a feeling netgear is aware of it. 

[JGL991]

How do I do that? I do not know the version prior?

[plemans · Accepted solution]

here's where you can get the firmware: R6400v2 | WiFi Router | NETGEAR Support

for older firmware, click on "view previous versions"

then just follow the manual firmware update process but use the older version you downloaded and not the newer. 

[JGL991]

Thank you I did not see the previous link before

[keneddy]

Went to the current version of firmware.  My issue wasn't as pervasive as what others had reported.  I would get a message "HMMM - Page couldn't be loaded" (Perhaps this was the DNS issue reported by others) then 4/5 seconds later it would load.  Occaisionally, there would be problems with the rendered page.  After doing a lot of searches and trying some setting adjustment the problem was still present.  Installed chrome and tested and the problem disappeared.  Fell back to edge and the problem would popup.  I have a router on either side of a hardware firewall.  The issue never surface on RTR1 only RTR2 behind the firewall.  No error messages in the FW log.  I reversed RTR2 and RTR1 and the problem stayed with RTR2 now infront of the firewall.  REalizing that although I had WIndows maint recently I alos upgrade rtr2's firmware.  So risking bricking the router I opted to fallback to the prior version and move the routers back to their original location.  I retested for about 30 minutes going against a URL that regularly had the issues.  Couldn't recreate the issue.

Probably wasted about 3 or 4 hours over 2 days diagnosing and resolving...

[JGL991]

I went back to the previous version and have had no problems anymore.  i do not allow windows to download updates to my laptop or do maintenance to it.  It is the only way i have been able to keep my laptop for 10 years now