nanog mailing list archives
Re: SEC webpages inaccessible due to Firefox blocking servers with weak DH ciphers
From: Robert Drake <rdrake () direcpath com>
Date: Fri, 17 Jul 2015 08:41:50 -0400
On 7/17/2015 4:26 AM, Alexander Maassen wrote:
Or just fallback to no SSL in some cases :( We have some old vendor things that were chugging along until everyone upgraded firefox and then suddenly they stopped working. The "fix" was to use the alternate non-SSL web port rather than upgrade because even though the software is old, it's too critical to upgrade it in-line.Well, this block also affects people who have old management hardware around using such ciphers that are for example no longer supported. In my case for example the old Dell DRAC's. And it seems there is no way to disable this block. Ok, it is good to think about security, but not giving you any chance to make exceptions is simply forcing users to use another browser in order to manage those devices, or to keep an old machine around that not gets updated.
The long term fix is to get new hardware and run it all in virtual machines with new software on top, but that may be in next years budget. I've also got a jetty server (opennms) that broke due to this, so I upgraded and fixed the SSL options and it's still broken in some way that won't log errors. I have no time to track that down so the workaround is to use the unencrypted version until I can figure it out.
Having said that, it seems that there is a workaround in Firefox if people need it. about:config and re-enabling the weak ciphers. Hopefully turning them on leaves you with a even bigger warning than normal saying it's a bad cert, but you could get back in. This doesn't help my coworkers. I'm not going to advise a bunch of people with varying levels of technical competency to turn on weak ciphers, but it does help with a situation like yours where you absolutely can't update old DRAC stuff.
https://support.mozilla.org/en-US/questions/1042061
Current thread:
- SEC webpages inaccessible due to Firefox blocking servers with weak DH ciphers Matthew Huff (Jul 16)
- Re: SEC webpages inaccessible due to Firefox blocking servers with weak DH ciphers Randy Bush (Jul 17)
- Re: SEC webpages inaccessible due to Firefox blocking servers with weak DH ciphers Alexander Maassen (Jul 17)
- Re: SEC webpages inaccessible due to Firefox blocking servers with weak DH ciphers Robert Drake (Jul 17)
- RE: SEC webpages inaccessible due to Firefox blocking servers with weak DH ciphers Matthew Huff (Jul 17)
- Re: SEC webpages inaccessible due to Firefox blocking servers with weak DH ciphers Alexander Bochmann (Jul 19)
- Re: SEC webpages inaccessible due to Firefox blocking servers with weak DH ciphers Jeff Gehlbach (Jul 17)
- Re: SEC webpages inaccessible due to Firefox blocking servers with weak DH ciphers Alexander Maassen (Jul 17)
- Re: SEC webpages inaccessible due to Firefox blocking servers with weak DH ciphers Geoffrey Keating (Jul 17)
- Re: SEC webpages inaccessible due to Firefox blocking servers with weak DH ciphers Michael O Holstein (Jul 17)
- Re: SEC webpages inaccessible due to Firefox blocking servers with weak DH ciphers Niels Bakker (Jul 17)
- Re: SEC webpages inaccessible due to Firefox blocking servers with weak DH ciphers Michael O Holstein (Jul 17)
- Re: SEC webpages inaccessible due to Firefox blocking servers with weak DH ciphers Alexander Maassen (Jul 17)
- Re: SEC webpages inaccessible due to Firefox blocking servers with weak DH ciphers Matt Palmer (Jul 17)
- Re: Re: SEC webpages inaccessible due to Firefox blocking servers with weak DH ciphers tqr2813d376cjozqap1l (Jul 17)
- Re: SEC webpages inaccessible due to Firefox blocking servers with weak DH ciphers Randy Bush (Jul 17)