<div dir="ltr">I removed the NO_SSLv2, NO_SSLv3 however, right before the SSL3_GET_RECORD:wrong version number the SSL routines:SSL23_GET_SERVER_HELLO:unknown protocol is shown.<br></div><div class="gmail_extra"><br clear="all"><div><div class="gmail_signature" data-smartmail="gmail_signature">Renato Jop<br></div></div>
<br><div class="gmail_quote">On Mon, Jun 27, 2016 at 8:29 AM, Yuri <span dir="ltr"><<a href="mailto:yvoinov@gmail.com" target="_blank">yvoinov@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
<p>Try to remove NO_SSLv2,NO_SSLv3 from options. SSLv2 already not
supported everywhere, RC4/3DES is SSLv3 ciphers, so it can be
confuse software. I.e., you use custom ciphers/protocols
combinations, which can lead issue.<br>
</p>
<br>
<div>27.06.2016 20:25, Renato Jop пишет:<br>
</div><div><div class="h5">
<blockquote type="cite">
<div dir="ltr">
<div>Thank you both for your valuable help.<br>
</div>
I've configured the tls-dh param with a strong Diffie-Hellman
group (2048 bits) and configured the cipher as Yuri specified
and I was able to get pass the unknown cipher, however now I get
a "SSL routines:SSL3_GET_<a>RECORD:wrong</a> version number". Here's
the configuration I changed:<br>
cipher=HIGH:MEDIUM:RC4:3DES:!aNULL:!eNULL:!LOW:!MD5:!EXP:!PSK:!SRP:!DSS
dhparams=/etc/dh-parameters.2048
options=NO_SSLv2,NO_SSLv3,SINGLE_DH_USE
tls-dh=/usr/local/etc/squid/dhparams.pem<br>
<br>
<br>
</div>
<div class="gmail_extra"><br clear="all">
<div>
<div data-smartmail="gmail_signature">Renato
Jop<br>
</div>
</div>
<br>
<div class="gmail_quote">On Sat, Jun 25, 2016 at 11:34 AM, Yuri
Voinov <span dir="ltr"><<a href="mailto:yvoinov@gmail.com" target="_blank">yvoinov@gmail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span><br>
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</span><a href="tel:25.06.2016" value="+50225062016" target="_blank">25.06.2016</a> 23:09, Amos Jeffries
пишет:<br>
<span>> On 26/06/2016 4:32 a.m., Yuri Voinov
wrote:<br>
>><br>
>> Amos, you are a wrong.<br>
>><br>
>> No Squid-4. It's unstable and not ready for
production. Whenever it's<br>
>> features.<br>
><br>
> So some beta software has bugs therefore nobody
should ever use it for<br>
> anything. I find that to be a strange and sad view of
the world.<br>
><br>
> Care to guess why I listed it as the last option
amongst several?<br>
> Or why 4.0.11 exists as a beta still?<br>
> It *is* an option for the mentioned problem(s) though
whatever its<br>
utility.<br>
</span>Agreed.<br>
<span>><br>
><br>
><br>
>><br>
>> Some time ago I have the same issue and know what
happens exactly.<br>
>><br>
>> Skype initial connection site uses RC4 cipher.
Which is disabled in most<br>
>> squid's configuration.<br>
><br>
> Your "know what happens exactly" differs from at
least two other peoples<br>
> debugging experiences with Skype.<br>
><br>
> RC4 is on the hitlist for most of the big vendors for
the past year or<br>
> so. IIRC there were several Windows Updates to remove
it and other<br>
> broken bits from a lot of things over the past year.<br>
> If Skype is still using RC4 it might be part of this
problem.<br>
</span>I'm sure this is problem and this problem exists. MS
do nothing to make<br>
they sites/services more secure. BTW, MS Updates uses RC4
ciphers itself<br>
this time. With strong siphers there is no way to setup WU
via Squid.<br>
I've spent much time to identify this problem in my setup
and find<br>
working workaround.<br>
<br>
Another part of problem is: MS often uses it's own
self-signed roots,<br>
which is exists in Windows, but nowhere else. And which has
not<br>
cross-signed by well-known root CA's. They think it make MS
services<br>
more secure. They wrong. But we can't do anything with it.
So, this is<br>
forced us to add self-signed MS roots to our Squid's CA
bundles to<br>
bump/splice.<br>
<span>><br>
><br>
>><br>
>> To make it works (as by as most M$ update sites)
it's require simple use<br>
>> this cipher's suite:<br>
>><br>
>>
HIGH:MEDIUM:RC4:3DES:!aNULL:!eNULL:!LOW:!MD5:!EXP:!PSK:!SRP:!DSS<br>
>><br>
>> That works for me in 5 SSL bumped setups. There
is no matter which squid<br>
>> version installed.<br>
><br>
> Thank you. Thats another option then. I'd rate that
below trying the EC<br>
> ciphers, and above library updates.<br>
</span>You are welcome.<br>
<br>
Just for information: MS has own IT infrastructure, with
some strange<br>
configured and non well-managed elements. I can't guarantee
this<br>
workaround will work everywhere or for every MS service.<br>
<br>
When I made my research, I've seen some strange security TLS<br>
combinations on MS sites/services. I.e., for example,
RC4+ECDSA+TLSv1.2.<br>
Or, for example, RC4+MD5+TLSv1. And some similar. Very
idiotic and<br>
potentially dangerous combinations. And - they support
ignores all<br>
requests. As usual.<br>
<br>
To my regret, I can not order all of its users to abandon
the use of<br>
Windows. So far, in my infrastructure have machines with
Windows XP.<br>
<br>
With this nothing can be done, it is necessary only to
weaken the<br>
security - for the sake of compatibility.<br>
<span>><br>
><br>
> Amos<br>
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</blockquote>
</div>
<br>
</div>
</blockquote>
<br>
</div></div></div>
</blockquote></div><br></div>