Error 28201 Kerio Vpn Client May 2026

This is the simplest and most effective fix for 70% of cases.

Why this works: It refreshes the certificate fingerprints and server settings, eliminating corruption. error 28201 kerio vpn client

In Kerio Control → Users → Edit your user → VPN tab → check Limit concurrent connections. This is the simplest and most effective fix for 70% of cases

Error 28201 is a client-side error code generated by the Kerio VPN Client software. In technical terms, it signifies a failure during the SSL/TLS handshake or a mismatch between the client’s configuration and the server’s expected parameters. Why this works: It refreshes the certificate fingerprints

Unlike generic VPN errors (e.g., "Authentication failed"), Error 28201 points specifically to issues with:

Think of it as the VPN client saying: "I tried to speak securely with the server, but something about the security credentials or the connection settings doesn't add up."