You were on the right track.  Apparently Fedora 25 started disabling the
anonymous TLS cipher suites by default in its OpenJDK security
configuration files.  The workaround is to edit

/etc/crypto-policies/back-ends/java.config

and remove "DH_anon" and "ECDH_anon" from the jdk.tls.disabledAlgorithms
list.

The other workaround is to use an X.509 certificate, which doesn't
require the use of an anonymous cipher suite.

DRC

On 12/1/16 10:52 AM, joa...@verona.se wrote:
> DRC <dcomman...@users.sourceforge.net>
> writes:
> 
>> I'll look into it.  I just installed Fedora 25 yesterday.  It is not
>> unusual for Fedora and other bleeding-edge distros to break things,
>> because most commercial TurboVNC users are using RHEL or SLES or Ubuntu
>> LTS.  Thus the majority of users won't notice issues like this until
>> they make it into the enterprise/long-term distros.
> 
> This helps on the server:
> VNCSERVERARGS[2]="-geometry 1024x768 -securitytypes none"
> 
> Which is of course not very good if you are not encrypting by other
> means.

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