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Enforced TLS: Available cipher suites

MarkusB

Dear Sophos-Community,

I am currently setting up a forced-TLS connection between a Sophos Email gateway with an email gateway of a different provider.

Unfortunately, we are experiencing a cipher mismatch. The Sophos gateway is offering the following cipher suites:

  • ECDHE-ECDSA-AES256-GCM-SHA384
  • ECDHE-ECDSA-CHACHA20-POLY1305
  • ECDHE-ECDSA-AES256-CCM8
  • ECDHE-ECDSA-AES256-CCM
  • ECDHE-ECDSA-AES128-GCM-SHA256
  • ECDHE-ECDSA-AES128-CCM8
  • ECDHE-ECDSA-AES128-CCM
  • ECDHE-ECDSA-AES256-SHA384
  • ECDHE-ECDSA-AES128-SHA256

Does anyone know if there are additional cipher suites available which can be added? The other gateway supports the following suites (all RSA related):

  • ECDHE-RSA-AES256-GCM-SHA384
  • ECDHE-RSA-AES256-SHA384
  • ECDHE-RSA-AES256-SHA
  • ECDHE-RSA-AES128-GCM-SHA256
  • ECDHE-RSA-AES128-SHA256
  • ECDHE-RSA-AES128-SHA

Thank you very much in advance!

Best regards

Markus



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