Articles

Best-practices for securing Kerio Connect, SSL certificate queries

• Authentication Issue: The token passed to the function is invalid. (87) Wrong parameter.

  Overview The customer is experiencing issues with connecting to the Kerio Connect server. The problem seems to be related to authentication, specifically with Secure Sockets Layer (SSL) and Transport ...

• Failed operation, internal error. Let's Encrypt client is not initialized

  Overview Whenever Setting up the Let's Encrypt SSL certificate in Kerio Connect 9.4 and above you are experiencing the error: Failed operation, internal error. Let's Encrypt client is not initialized ...

• Failed to issue Let's Encrypt certificate: Failure / timeout verifying challenge passed

  Overview Some users of Kerio Connect may encounter difficulties when trying to renew/generate the Let's Encrypt certificate. Despite ensuring that port 80 is open, the issue persists. This problem can...

• Troubleshooting Let's Encrypt Certificate Renewal Issues on Kerio Connect Server version 9.4.x

  Overview You may be experiencing an issue with the renewal of the SSL certificate on Kerio Connect server running versions 9.4.x. When triggering a Let's Encrypt certificate renewal, you may be gettin...

• Troubleshooting Let's Encrypt Failure contacting https://acme-v02.api.letsencrypt.org/directory;rel=index to read header

  Overview If you are using Kerio Connect's integrated LetsEncrypt certificate utility and trying to generate an SSL certificate or renew it, you may encounter the following error message: Operation fai...

• Troubleshooting 504 Error in Webmail when Proxy Server is used

  Overview When accessing Webmail, you might get the following Proxy Error message. 504: Request Deniedupstream timed out (60: Operation timed out) while reading response header from upstream, client: x...