Suddenly, at some point, my Firefox would no much longer affix to my CUCM server… Something around Secure Connection Failed. What gives?!I provided to have the ability to add the certain website to ‘trusted’ sites, to bypass these silly messages, yet no even more. I couldn’t gain to my CUCM 8.6.2 server…

An error emerged throughout a connection to X.X.X.X:8443. SSL peer rejected a handshake message for unacceptable content. (Error code: ssl_error_illegal_parameter_alert)

StackOvercirculation has the solution:

Warning! This will disable some Firefox security features! This can be risky.In the URL bar, type about:config, accept the warning.

You watching: Ssl_error_illegal_parameter_alert

Search for “protection.tls.version”

Change “defense.tls.version.min” from 1 to 0

Change “defense.tls.version.fallback-limit” from 1 to 0

That resolved it!

Central Company District, Houston, TX, USA

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Posted on July 1, 2015July 1, 2015Author King.RichardCategories FixesTags Cisco, CUCM, FireFox

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