Secure Connection Failed When Switching Accounts Via Dashboard [firefox 46]

I have 20+ servers running latest versions of either cPanel 11.54 or 11.56, all fairly new servers with typical configs.

As of a few days ago all of these servers are exhibiting the same problems, not only for me but some colleagues as well (on different computers/networks)

Connection reset errors logging in to WHM randomly:

A network error occurred during your login request. Please try again. If this condition persists, contact your network service provider. -- will say this a few times then work.

connection resets launching a cPanel from WHM randomly

connection reset launching webmail from cPanel all the time

We've narrowed it down to a possible firefox issue, we cannot duplicate any of the problems using Opera, Chrome or IE. We are using Firefox 46.0 which was recently updated a few days ago.

Couple of general troubleshooting things I've tried thus far:

- servers run CSF and modsecurity, disabled both temporarily and no change
- cleared firefox cache, tried with a new install of firefox etc. no change
- problem is occurring with accessing whm/cpanel via SSL and NON SSL
- tried on servers with 11.54 and 11.56 and issue is occurring on both
- force updated an 11.54 server to 11.56 and problem persists after

Is anyone else seeing this problem with cPanel & firefox 46.0?

 

I've recently just submitted another topic regarding a very similar problem I'm seeing across many servers while using firefox 46.0

recent cPanel issue with firefox 46.0

 

Hello

I fixed it by resetting Firefox (backup your profile first) and from Preferences -> Advanced -> Network -> Settings, selecting "no Proxy".

I previously ran a self signed certificate on the server along with an exception which I think has something to do with the issue.
After deleting the old exception, I thought I would add another one for the current certificate but when I clicked "View Certificate Info", most of the data was wrong. The common name dated back to a time when I ran a self signed certificate.

I don't know what the problem is/was but this worked for me. Hope it helps.

 

I'm a bit curious as to how cPanel is functioning that is causing this error. From reading the RFC - isn't this something that could simply be avoided entirely by not dropping the connection unexpectedly or sending the proper header?

I would personally like to avoid random future and unexpected browser breakage. As at least two major browsers have already apparently dropped support for this RFC - why rely on it moving forward from a technical standpoint?

Ideally if cPanel is going to have custom fixes within their software for various browsers - cPanel should do their best to test all of the newest/latest browsers for compatibility and either do their best to resolve them before the customer ever sees it or works with the browser providers to resolve issues before the version is mainstream.

At the end of the day we want things to not break randomly and for no reason and I think everybody at cPanel would agree.

 

It looks to me like RFC 2616 is no longer valid and has been obsoleted by RFC 7235.

RFC 7235 does not appear to include 8.3.4 or any variant of it.

It seems to me the best course of action would be to update cPanel to be compliant with the new RFCs as the common browsers are clearly heading that direction.

Wait and see - that said any sort of ETA on this 'work around' as we are going to have more and more customers complaining.

 

Is there any update on this issue?

 

Today's update 56.0.13 seems to solve it.

 

I'm now seeing this issue with IE 11 and Edge on both my servers.