Can't access web page from the application of vRO with Firefox 39.0

I tried to access to https://IPAddress:8281 / vco / and all of a sudden I'm greeted with the following error:

An error occurred during a connection to ipaddress:8281. SSL has received a low ephemeral Diffie-Hellman key in the handshake message exchange the server key. (Error code: ssl_error_weak_server_ephemeral_dh_key)

I think that Firefox updated itself between now and the last time I tried to access the web page.

I checked the release notes for version 39 and I see this: remove support for SSLv3 unsecured for communications network

-What is the source of the problem? Does anyone else have this problem?

The problem is that SSLv3 and some suites of encryption used in vRO devices are now considered not secure and some applications for example. Firefox started blocking them.

Following are the result of encryption currently configured in vRO 6.x:

  TLS_DHE_RSA_WITH_AES_256_CBC_SHA
  TLS_DHE_DSS_WITH_AES_256_CBC_SHA
  TLS_RSA_WITH_AES_256_CBC_SHA
  TLS_DHE_RSA_WITH_AES_128_CBC_SHA
  TLS_DHE_DSS_WITH_AES_128_CBC_SHA
  TLS_RSA_WITH_AES_128_CBC_SHA

Those who have DH on their behalf (Diffie-Hellman) should be disabled (4 of 6). The easiest way is to remove from the list of encryption algorithms in the following files:

  /etc/vco/app-server/server.xml  (vRO server)
  /etc/vco/configuration/server.xml  (vRO configurator)

After removing the unsecured encryption, you may need to restart vRO. Now you should be able to connect to the vRO device using Firefox 39.

Tags: VMware

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