Re: [Zenloadbalancer-support] Unable to pass SSL Grade 'F' in SSL Offload HTTP(S) Farm

[David B. <dav...@vo...>]

Hi Emilio/James,

After looking into it more, yes, openssl is indeed too old. ZenLB 3.10 runs on Debian Jesse, and uses OpenSSL 1.0.1k, hence supports TLS1.2

I am rolling out 2 new LB’s for this client in staging right now. But I’m struggling to disable SSLv3. No matter what I enter into custom ciphers, whatever way I try and disable SSLv3, it ALWAYS handshakes on SSLv3 if I tell my test Ubuntu system to force/try sslv3.

TLSv1 I’ve got disabled now, and 1.1 too, so TLSv1.2 is the only TLS method available. But I cant get rid of SSLv3!! Any ideas?

Best Regards,
Dave Byrne
Head of Technical Projects

Office: 01622 524 200
The Maidstone Studios | Vinters Business Park | New Cut Road | Maidstone | Kent | ME14 5NZ
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From: Emilio Campos [mailto:emi...@gm...]
Sent: 25 October 2016 16:56
To: zen...@li...
Subject: Re: [Zenloadbalancer-support] Unable to pass SSL Grade 'F' in SSL Offload HTTP(S) Farm

Dear James, yes openssl seems too old, try with next zen version, it includes a recent openssl version.

Take in mind that SSL security is changing along time and vulnerabilities are detected so openssl and pound should be updated from package repo if you are working with Community Edition.

Regards!



2016-10-25 17:08 GMT+02:00 James Doherty <ji...@jd...<mailto:ji...@jd...>>:
Dave,

Did anyone ever answer this question ?

Jim

James M Doherty
President
REVIVE CONSULTING LLC
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Author: Bought With A Price<http://bookstore.westbowpress.com/Products/SKU-000731960/Bought-with-a-Price.aspx>
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On Thu, Oct 20, 2016 at 11:41 AM, David Byrne <dav...@vo...<mailto:dav...@vo...>> wrote:
Hi,
We have a client who needed to be able see requests ‘real ip’ before SSL termination on back end servers. So our solution was to terminate SSL on ZLB in an HTTP(S) farm. This worked fine, but now SSL Analysis Tests grade the SSL/Site as grade F due to a number of weaknesses:
-Supports SSLv3
-Supports TLSv1
-Does not support TLSv1.1/1.2
-Diffie-Hellman Parameter Weak – Only 1024bits

No matter what we change our Cipher/Protocol string to in custom security in the Farm, it does not change. It refuses to support TLS above 1.0, and this is a major issue for the client.

I believe this is due to ZLB (v3.05) running OpenSSL v0.98.

Please can you advise on whether there is an accepted fix for this? I guess update openssl, but that does seem risky on a packaged system such as ZLB. Thanks.

Best Regards,
Dave Byrne
Head of Technical Projects

Office: 01622 524 200
The Maidstone Studios | Vinters Business Park | New Cut Road | Maidstone | Kent | ME14 5NZ
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