Educause Security Discussion mailing list archives
Re: Lessons learned disabling SSLv3
From: "Childs, Aaron" <aaron () WESTFIELD MA EDU>
Date: Tue, 24 Mar 2015 17:03:22 +0000
Hi Dan, We have been working to disable SSLv3 for a little while now with fairly low impact to our campus community. As you disable SSLv3 and tweak supported cipher suites you can test your server with Qualys SSL Server test (https://www.ssllabs.com/ssltest/analyze.html) and that will show you which OS/Browser combinations may have problems connecting to your site. Have a good day, Aaron [cid:image004.jpg@01D06632.E7641C00] Aaron Childs Associate Director [cid:image003.png@01CF5889.646358F0] Infrastructure Services Information Technology Services Wilson Hall - 577 Western Ave. Westfield MA 01086 P 413.572.5527 F 413.572.5615 aaron () westfield ma edu<mailto:aaron () westfield ma edu> From: The EDUCAUSE Security Constituent Group Listserv [mailto:SECURITY () LISTSERV EDUCAUSE EDU] On Behalf Of Woodruff, Dan Sent: Tuesday, March 24, 2015 11:48 AM To: SECURITY () LISTSERV EDUCAUSE EDU Subject: [SECURITY] Lessons learned disabling SSLv3 We are working to disable SSLv3 in favor of at least TLS1.0 (possibly higher) on all web servers at the University. We have some concerns about browser compatibility issues with the versions of TLS. All modern browsers support at least TLSv1.0 so we anticipate that the impact to our community will be low if we disabled only SSLv3. If we disabled TLSv1.0 as well, it seems more browsers would have compatibility issues. Source: http://en.wikipedia.org/wiki/Transport_Layer_Security For systems that are managed by the University, we can make broad configuration changes as needed, but we also have students and outside parties with machines not under our control. I'm wondering if other schools have gone through this effort to disable SSLv3 and/or TLSv1.0 and have any lessons learned or unexpected consequences they could share? Thanks in advance, Dan Woodruff University IT Security and Policy University of Rochester
Current thread:
- Lessons learned disabling SSLv3 Woodruff, Dan (Mar 24)
- Re: Lessons learned disabling SSLv3 Jeff Borton (Mar 24)
- Re: Lessons learned disabling SSLv3 Rob Taylor (Mar 24)
- Re: Lessons learned disabling SSLv3 Childs, Aaron (Mar 24)
- Re: Lessons learned disabling SSLv3 William Clarke (Mar 24)
- Re: Lessons learned disabling SSLv3 Thomas Carter (Mar 24)
- Re: Lessons learned disabling SSLv3 McClenon, Brady (Mar 24)
- Re: Lessons learned disabling SSLv3 Thomas Carter (Mar 25)
- Re: Lessons learned disabling SSLv3 Brad Judy (Mar 25)
- Re: Lessons learned disabling SSLv3 Velislav K Pavlov (Mar 25)
- Re: Lessons learned disabling SSLv3 McClenon, Brady (Mar 24)
- Re: Lessons learned disabling SSLv3 Will Froning (Mar 28)