OCSP Responder

The Krestfield OCSP Responder provides a mechanism to rapidly deploy a high performance, RFC 2560 compliant OCSP server onto Microsoft Windows platforms without the need to install IIS or configure any other roles

The Krestfield OCSP supports Microsoft CNG Cryptographic Providers as well as the industry standard PKCS#11 interface (as supported by the Thales nCipher and Gemalto Luna range of HSMs)

CRLs from any CA (including the Microsoft CA) can be accessed and will be automatically re-read when freshly produced ensuring up-to-date status information.

Signed requests are supported and can be enforced.

An unlimited number of CAs may be supported by the server, each able to utilise separate Cryptographic Providers.

The server includes the option to cache responses which can speed up response times.

The server is able to log to manage text files which can include all requests, responses and processing steps. Logs can be limited and rolled over based on time or size limits.

Errors can be logged to the Windows Event Log enabling event scraping tools to monitor health and alert on any issues.

Real time statistics are available including the number of responses, their types and average response times.

The Krestfield OCSP Monitor is provided for free with the OCSP Responder and enables the monitoring of several OCSP servers. It is able to test several scenarios, including different responses (good, revoked, unknown, unauthorized, error etc), response times and OCSP response validity


The server is licensed on an annual basis which includes upgrades, bug fixes and access to 8x5 support. Prices start from £995+VAT.

For more information or to request a free trial, please contact Krestfield Sales
Contact Us
  • Krestfield House
  • High Wycombe, HP13 5UY
  • Call: 020 8938 3616

Sales & Support

Should you need any help with any of Krestfield's products, or wish to make any suggestions, please contact us.

Sales: sales@krestfield.com

Support: support@krestfield.com

Latest News


Version 1.1.0 released


Version 3.1.0 released


Our Mission

To create secure, highly available, easy to use products that are priced fairly

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