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Activity logs Accesses HowTo's/Configuration Reporting Vulnerabilities

  • Configuring IPv4 Settings

    Overview Each Kerio Control interface on the Internet, Trusted/Local, and Other Interfaces groups can be set up in either of two modes: Automatic – This mode is used if Kerio Control detects a DHCP se...

  • Email and Drive Services Are Unstable with DNS Errors

    Overview Google services like Gmail and Gdrive have the following connection errors due to DNS Issues, and logs indicate packets dropped after the DNS queries: The server encountered an error. Please ...

  • Modifying Internal configuration files

    Overview When troubleshooting advanced Directory Services, Strongswan, or IPsec VPN issues, it might be required to review and modify the internal configuration files. The advanced configs are stored ...

  • Import MAC address to Permit list

    Overview Where there is a need to upload MAC addresses in bulk, it can be done manually by modifying the Kerio Control configuration file. The standard procedure involves adding MAC Addresses through ...

  • Changing Kerio Control configuration due to ISP migration

    Overview While changing your ISP (Internet Service Provider), you will get a new Public IP assigned. This will need specific Kerio Control configuration change to avoid firewall outage or system disru...

  • ReverseDNSLookupType clarifications

    Overview Kerio Control can perform Reverse DNS lookups. The default configuration may generate a huge amount of HTTP connections in certain environments, e.g. Kerio Control firewall is behind another ...

  • System Time warning mismatch

    Overview When opening the Kerio Control admin dashboard, the yellow warning sign against the System Time field is shown. The time is reporting a mismatch problem. This might usually happen when the co...

  • Resolving DHCP error: Unable to allocate address, scope is exhausted

    Overview Kerio Control has a built-in DHCP server feature. From time to time, the DHCP server can stop assigning IP addresses for DHCP clients. The error log may show the following: DHCP error: Unable...

  • DHCP Lease Renewal and Rebinding Processes

    Overview Kerio Control allows configuring advanced DHCP settings, such as lease time, DNS server, gateway, etc. In specific NAS or SMS gateway environments, DHCP lease interval may be requested too of...

  • Configuring RingCentral VoIP bandwidth rules

    Overview While trying to configure QoS and bandwidth management rules for RingCentral traffic, the specific Kerio Control settings need to be applied. This article provides detailed information on how...