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Getting error SSL_ERROR_NO_CYPHER_OVERLAP when using Parallels Remote Application Server

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  • Last reply by TysonD

TysonD
TysonD
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After setting up Parallels Remote Application Server, we are not able to connect using Firefox v54.0.

Message received: Error code: SSL_ERROR_NO_CYPHER_OVERLAP

Product page: http://www.parallels.com/products/ras/remote-application-server/

When setting security to "medium", Firefox works great. We are using "high" security however and so it only works in Edge, chrome, and IE11. We would really like for this to work in the current version of Firefox (note, have not tested older releases).

After looking at this page:

http://kb.parallels.com/en/123007

It is unclear to me whether we can make any changes to the product to get it working with Firefox while maintaining high security. Making changes to Firefox isn't an option since this product is used in a BYOD scenario and we won't be making or recommending config changes to user's browsers if there are others that work out of the box.

After setting up Parallels Remote Application Server, we are not able to connect using Firefox v54.0. Message received: Error code: SSL_ERROR_NO_CYPHER_OVERLAP Product page: http://www.parallels.com/products/ras/remote-application-server/ When setting security to "medium", Firefox works great. We are using "high" security however and so it only works in Edge, chrome, and IE11. We would really like for this to work in the current version of Firefox (note, have not tested older releases). After looking at this page: http://kb.parallels.com/en/123007 It is unclear to me whether we can make any changes to the product to get it working with Firefox while maintaining high security. Making changes to Firefox isn't an option since this product is used in a BYOD scenario and we won't be making or recommending config changes to user's browsers if there are others that work out of the box.

All Replies (4)

FredMcD
FredMcD
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SSL_ERROR_NO_CYPHER_OVERLAP Your server apparently doesn't offer any cipher suites necessary to establish a secure https connection that are supported in Firefox. You can check what kind of cipher suites Firefox can make use of by visiting https://www.ssllabs.com/ssltest/viewMyClient.html

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
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You did make sure that TLS 1.2 is enabled in Firefox?

You can check the TLS settings prefs on the about:config page

  • security.tls.version.min
  • security.tls.version.max
  • 1 means TLS 1.0; 2 means TLS 1.1; 3 means TLS 1.2; 4 means TLS 1.3;
TysonD
TysonD Question owner
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FredMcD said

SSL_ERROR_NO_CYPHER_OVERLAP Your server apparently doesn't offer any cipher suites necessary to establish a secure https connection that are supported in Firefox. You can check what kind of cipher suites Firefox can make use of by visiting https://www.ssllabs.com/ssltest/viewMyClient.html

Thank you for the link, this will be helpful.

TysonD
TysonD Question owner
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cor-el said

You did make sure that TLS 1.2 is enabled in Firefox? You can check the TLS settings prefs on the about:config page
  • security.tls.version.min
  • security.tls.version.max
  • 1 means TLS 1.0; 2 means TLS 1.1; 3 means TLS 1.2; 4 means TLS 1.3;

Yep. Using default settings and TLS 1.2 is enabled. Problem appears to be cipher settings. I'm just a little shocked that the default high security setting from Parallels wasn't tested apparently in Firefox.