[FOSDEM] fosdem.org does not support TLS 1.[12]

Kurt Roeckx kurt at roeckx.be
Thu Jan 16 19:05:50 CET 2014

On Wed, Jan 15, 2014 at 10:06:19AM -0600, Tom Marble wrote:
> All:
> As everyone in our community can benefit from improving security
> I thought I would share this observation with everyone.
> I recently realized that Iceweasel, by default, is not configured
> to not support the recent versions of TLS yet it accepts weak ciphers.
> You can check your browser here (notably TLS version)
> https://www.howsmyssl.com/
> Here's how to fix this in Firefox
> http://kb.mozillazine.org/Security.tls.version.*
> I set security.tls.version.min = 2 (require at least TLS 1.1)
> I set security.tls.version.max = 3 (support TLS 1.2)

Only TLS 1.1 and 1.2 support is probably going to cause you
problems since only about 25% of the sites support it.  (Which is
also about the same size as sites still supporting SSL2.)

I personally run with security.tls.version.min set to 1
and RC4 and 3DES disabled.  As far as I know this should
support > 95% of the sites.  Please note that there is
nothing wrong with TLS 1.0 in case your browser is patched
for BEAST.

This also results in a "Probably okay" messages in the howsmyssll
site above.

But this list is probably not the best place to discuss such
things and the bettercrypto.org mailling list might be better for


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