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V1.0.4.122_10.0.95 Update on R6400v2 kills lon in page
I applied V1.0.4.122_10.0.95 to my Netgear R6400v2 router yesterday. Now I can’t access the router configuration GUI. Everything else works OK, but I can’t log into the router now. The update complet...
I am experiencing the same issue as Tvestra after updating the routers firmware. Chrome (Windows & IOS), Edge, Safari (IOS) and curl all return their form of connection refused when attempting to navigate to the web ui (192.168.2.1, yes this is not the standard .1.1). Since the browser was able to access the web ui immediately prior to the firmware update and was how the update was initiated, I have a hard time believing it is an issue with the browser. The router seems to otherwise be functioning as expected. I have rebooted the router 5 or 6 times since the firmware update with no change. I have attempted to access the web ui from both wireless (both 2.4 GHz and 5 GHz) and wired connections with the same results.
An interesting observation is that the Nighthawk IOS app is able to connect.
BrowserNighthawk App
As I stated before the problem is that the router no longer has the HTTP/HTTPS (80/443) ports open. If these ports are not open you cannot connect to the web server in the router. That is the problem. You are just chasing your tail doing a bunch of other stuff to try and connect as there is nothing to connect to. Please refer to the nmap run I did and you can see a lot of ports are open, but no 80 or 443. Port 5555 is running some kind of web service (maybe that is for the IOS app), so the web server running that virtual server. It looks like the server has a configuration issue. As long as port 80 or 443 are closed you will not be able to log onto the router with a web browser. The only solution I can see is to load a pervious version of the update with tftp as that port is still open.
As all the other functions on the router are still working I am going to leave it alone until next week, then I will try to fix it with tftp.
https://kb.netgear.com/000059634/How-to-upload-firmware-to-a-NETGEAR-router-using-Windows-TFTP
I can confirm that the Nighthawk app can indeed access my router presumably using the 5000/5555 ports, however you can only update to the current firmware from Netgear's online update site. No option for downgrading or manual installation. You also cannot access any setting to modify them - or at least not using my IOS or Android apps.
Nivlac wrote:
.... you can only update to the current firmware from Netgear's online update site. No option for downgrading or manual installation.
Investigate the use of TFTP.
How to upload firmware to a NETGEAR router using Windows TFTP | Answer | NETGEAR Support
This also explains how to enable TFTP on a Windows PC.TFTP isn't the easiest operation, timing is important, as are the exact details for the commands and prompts you see. It can take several attempts. So if you are forced to use TFTP try a web search for videos that guide you through the process.
For example:
Different device, but the approach is the same.
