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From Reindl Harald <>
Subject Re: ssl questions
Date Thu, 06 Nov 2014 09:42:24 GMT

Am 20.10.2014 um 21:50 schrieb James Peach:
>> On Oct 20, 2014, at 8:49 AM, Reindl Harald <> wrote:
>> HTTPD: SSL 2 handshake compatibility Yes
>> TS:    SSL 2 handshake compatibility No
> We disabled SSLv2 by default on TS-787, Tue May 17 15:34:41 2011.

that is *not* the same and frankly that breaks not only "ab", also older 
browsers - please look at the thread below, handshake compatibility != 

i have disabled sslv2 *asnd* sslv3 on any httpd without breaking older 
clients and combined with the fact that ATS don't support DHE ciphers 
"ssllabs" lists *a lot* of clients not able to talk with ATS over TLS

>> can that be the reason "ab -c 100 -n 100000" fails to a ATS?
>> keep in mind that don't mean sslv3 or even sslv2 are enabled!
> Not really sure about that, but should be easy to test when I get a minute.

see above

>> HTTPD: Heartbeat (extension) Yes
>> TS:    Heartbeat (extension) No
>> how does ATS that using the same openssl binaries?
>> "OPENSSL_NO_HEARTBEATS=1" as ENV don't disable it for httpd
> You need to set OPENSSL_NO_HEARTBEATS=1 at OpenSSL build time

i know but.....

> I don't know why we would not be vulnerable to heartbleed with a vulnerable OpenSSL version.
I poked around in OpenSSL and mod_ssl for a while and AFAICT heart beats are enabled by default.
I didn't see any special knob that would turn it on.

but says "Heartbeat (extension) No" on 
a Fedora 20 machine with ATS and the same OS and SSL binaries than httpd

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