A couple of days ago my web gui simply stopped loading.  The server has been rock solid for years and I am not exactly sure what happened as I wasn't doing anything with it at the time.  All of the dockers were still up and I can access the command line, I just couldn't access the web gui.  I get the following error in Chrome but it doesn't work in any other web browser either:

 

This site can’t be reached

The webpage might be temporarily down or it may have moved permanently to a new web address.

ERR_HTTP2_PROTOCOL_ERROR

 

So I tried rebooting the machine and the dockers etc all came back but the web gui is still MIA.  attached is my diagnostic log.

 

Thanks in advance!

asgard-diagnostics-20210821-0002.zip

Network problem. Check ports, plugs, cables on server, switch, router.

I checked the cables, they seem fine.  Some additional information.  I've tried rebooting the server and the router with no change.  I'm able to watch movies on Plex, even outside of my network and I can access all of my docker containers' web guis just not the one for unraid.  Additionally, I can ping both NIC IP addresses and get replies, so the server appears to be there.  I'm not really sure why I can access everything else but just not the unraid web gui.  I also have mapped network drives on the same server and I can access those no problem.

6 hours ago, IcicleTrepan said:

ERR_HTTP2_PROTOCOL_ERROR

 

This sounds related to SSL. Can you access the webgui at:

  https://<ipaddress>  (note: https not http)

(you will need to acknowledge a certificate error in your browser)

 

If that works, then go to Settings -> Management Access and set "Use SSL/TLS" to No. That should allow you to access the webgui at http://<ipaddress>  (note: http not https)

 

6 minutes ago, ljm42 said:

 

This sounds related to SSL. Can you access the webgui at:

  https://<ipaddress>  (note: https not http)

(you will need to acknowledge a certificate error in your browser)

 

If that works, then go to Settings -> Management Access and set "Use SSL/TLS" to No. That should allow you to access the webgui at http://<ipaddress>  (note: http not https)

 

unfortunately I can't access the webgui with https.  http also appears to be redirecting to https.  maybe there is a way to change that setting from console?

So https://<ipaddress> gives the generic 'ERR_HTTP2_PROTOCOL_ERROR' with no way to get past it? Bummer.

 

To disable SSL in 6.9.2, you'll need to modify this file on your flash drive:
  config/ident.cfg
and change:
  USE_SSL="yes"
to
  USE_SSL="no"
and reboot.

 

19 hours ago, ljm42 said:

So https://<ipaddress> gives the generic 'ERR_HTTP2_PROTOCOL_ERROR' with no way to get past it? Bummer.

 

To disable SSL in 6.9.2, you'll need to modify this file on your flash drive:
  config/ident.cfg
and change:
  USE_SSL="yes"
to
  USE_SSL="no"
and reboot.

 

That has done the trick.  so it seems like SSL was the issue, but how do I fix it?

1 hour ago, IcicleTrepan said:

That has done the trick.  so it seems like SSL was the issue, but how do I fix it?

 

On the flash drive, delete any files in this directory:
  config/ssl/certs

then you can setup SSL again. The exact procedure depends if you want to use a self-signed cert, your own cert, or Unraid's Let's Encrypt cert. I'd recommend going to Settings -> Management Access and turning on the help.