SSL Labs Known Issues

Document created by Ivan Ristić on Jun 17, 2014Last modified by Robert Dell'Immagine on Jan 4, 2018
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This page documents the known issues with the SSL Labs code running in production (i.e.,



If your issue is listed as fixed in the latest development version, check it here:

If you want to report a new problem, please go to this page.


IP Addresses


We are using the following IP address ranges:

  • SSL Labs -
  • SSL Pulse -
  • Development SSL Labs server -




At present, SSL Labs has the following limitations:

  • SSL Labs currently uses Mozilla CA certificate store only. If the root is not there we report it as not trusted. A future SSL Labs version will report trust for each major root store separately.
  • Certificate trust is not checked in handshake simulation, we only perform TLS handshake.