Articles

This section describes all Kerio Control VPN related articles

• Resolving IPSec IP/Route configuration mismatch error

  Overview While trying to set up an IPsec VPN connection between two offices, the tunnel disconnects after reaching a 2 hours timeout. Afterward, the tunnel reconnects within 10-15 seconds. The error l...

• Restrict VPN access for certain IP addresses

  Overview When there is a need to allow VPN access only for certain employees, connecting from a specific IP address, Kerio Control traffic rules should be configured respectively. In this particular s...

• Error in Establishing VPN Tunnel with Firewall

  Overview Creating an IPSec VPN tunnel with an external firewall fails with the below error seen in Kerio Control logs: {charon} charon: 12[IKE] establishing IKE_SA failed, peer not responding Solution...

• Error 1920 when Installing Kerio Control VPN Client Version 9.3.4

  Overview When installing the Kerio Control VPN client version 9.3.4 build 3795 on a Windows system, the installation fails with the error: Error 1920. Service Kerio Control VPN Client Service (KVPNCSv...

• Kerio Control not Responding during IKE Rekey with External Firewall

  Overview When IKE rekeying is being done between Kerio Control (initiator) and an external firewall (responder), the VPN tunnel connection goes down for some time after every few hours. This causes th...

• Kerio VPN Client Specifications

  Overview Some Internet Service Providers (ISPs) require information related to the VPN that users will be using when connected to that ISP. Information Below is the default information related to the ...

• Kerio Control VPN Client Fails to Install on macOS Big Sur

  Overview When installing the Kerio Control VPN client for macOS on Big Sur (11.0), the below error message is seen on the Installation step: The software to be installed required Mac OS Mountain Lion ...

• 'Preferences Error - Could not load Kerio Control VPN Client preference pane' After Upgrading Kerio Control on macOS Big Sur

  Overview macOS Big Sur requires third-party applications to ask for permissions to run in System Preferences for some functionality. However, in some cases, due to user profile settings or issues, the...

• Kerio Control VPN Client Issues when Upgrading to a New OS

  Overview You are using the VPN client to trying to connect to after upgrading to a new operating system (OS) (e.g. Windows 11 or MacOS X Monterey)   Solution If the operating system is not mentioned i...

• 'SSL Connection Cannot Be Established' Error in VPN Client

  Overview The problem seems to sporadically happen after restoring configuration of an appliance from a backup. The specific error encountered is 'SSL connection cannot be established' when attempting ...