[stunnel-users] RHEL6 Update stunnel-4.29-3.el6_6.1 breaks functionality?

[Andy Lutomirski]

On Sun, Dec 21, 2014 at 10:26 AM, Michal Trojnara
<Michal.Trojnara at mirt.net> wrote:
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>> On Dec 18, 2014, at 08:27, H.U.Flück <huf at inomatix.com> wrote: The
>> error thrown is something like: Dec 17 17:30:23 srvabas stunnel:
>> LOG3[3385:140171595282368]: SSL_accept: 140760FC:
>> error:140760FC:SSL routines:SSL23_GET_CLIENT_HELLO:unknown
>> protocol
>>
>> What are we missing? Do we need to change the configuration?
>
> I downloaded the source packages to identify the exact change they made.
> The only difference between the previous and the updated version is
> that the new one configures stunnel with:
>
> configure --enable-fips --enable-ipv6 \
>   CPPFLAGS="-UPIDFILE -DPIDFILE='\"%{_localstatedir}/run/stunnel.pid\"'"
>
> rather than:
>
> configure --disable-fips --enable-ipv6 \
>   CPPFLAGS="-UPIDFILE -DPIDFILE='\"%{_localstatedir}/run/stunnel.pid\"'"
>
> The update doesn't change anything in the source code of stunnel.
>
> In stunnel 4.x FIPS mode is enabled by default.  You may disable it
> with "fips = no".  In order to get your configuration working without
> disabling FIPS mode you may also try "sslVersion = TLSv1".

Unfortunately, AFAICT there is no way to write a conf file that will
reliably disable fips on the stunnel 4.x series.  This issue is fixed
in 5.0.

--Andy

>
> Mike
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-- 
Andy Lutomirski
AMA Capital Management, LLC