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Version: 6.2.3

Release Date: 2022-03-30

Main new features

ED25519PH support

Added support for the use of ED25519PH in the following cases:

  • Processing a CA signed with ed25519ph
  • Processing a CRL signed with ed25519ph
  • Ability to use OCSP signer certificate that has an ed25519ph key

Configure number of allowed connections

Added 'connections' parameter on the responder.#.level to allow setting the maximum number of allowed connections that can be handled simultaneously.
If not specified, the default value of 2000 allowed connections will be set.


The log level for logging messages of type 'run socket: Socket ...' and 'Closing socket:' has been changed from Info to Trace level in order to reduce the amount of messages in logs that are produced with the default configuration.

Detailed feature list

For a detailed overview of changed functionality, deprecated functions and corrected problems, see Release.txt which is provided with the installation media.


Contact Information

For information regarding support, training and other services in your area, please visit our website at


Nexus offers maintenance and support services for Nexus OCSP Responder to customers and partners. For more information, please refer to the Nexus Technical Support at, or contact your local sales representative.