Error 28201 - Kerio Vpn Client

Kerio VPN Client error 28201 is a common connection failure that usually means the client couldn’t establish a secure tunnel with the VPN server. Below is a clear, actionable blog post you can use to inform readers and help them fix the issue.

SSH into the Kerio Control server and restart the VPN service (this clears all connections): error 28201 kerio vpn client

/etc/init.d/kerio-vpn stop
/etc/init.d/kerio-vpn start

⚠️ This will disconnect all active VPN users temporarily. Kerio VPN Client error 28201 is a common

If you are the Kerio Control administrator and multiple users report Error 28201, the problem is on the server. ⚠️ This will disconnect all active VPN users

Check these immediately:

Check Live Logs:

If the log shows "Client certificate validation failed", but you see Error 28201, the client is misreading it as a timeout. Re-issue client certificates.