B.15 Cannot Receive Events from Secure Configuration Manager After Upgrading Sentinel to Version 7.3 SP1 and Later

Issue: Sentinel uses the Diffie-Hellman protocol to communicate with Secure Configuration Manager. As part of fixing the Logjam vulnerability, the certificate key size for the Diffie-Hellman protocol in Sentinel has been increased to 2048. However, Secure Configuration Manager uses the default certificate key size; that is, 1024. Because of this mismatch, Secure Configuration Manager can no longer communicate with Sentinel.

Workaround: Upgrade Secure Configuration Manager to version 6.1. For more information, see the Secure Configuration Manager 6.1 Release Notes.