Overview

While configuring network interfaces, Kerio Control interfaces can be set to Automatic, Manual, and Link-Local only modes (applies for IPv6 only).

This article describes how to configure IP addresses, gateways, and DNS servers in Kerio Control.

Diagnosis

Each Kerio Control IPv4 interface on the Internet, Trusted/Local, and Other Interfaces groups can be set up in either of two modes:

• Automatic mode is used if Kerio Control detects a DHCP server on the interface and receives an IP address from DHCP.
• Manual (static) mode is used if Kerio Control cannot detect a DHCP server on the interface. This is typically all interfaces in the Trusted/Local Interfaces and Other Interfaces groups. If Kerio Control does not detect a DHCP server on the interface, it runs its own DHCP server through all Trusted/Local Interfaces and Other Interfaces configured to 10.10.X.Y, where X is the index of the LAN interface (starting with 10) and Y is 1 for the Control interface and 11-254 for DHCP assigned hosts. However, the interface properties stay in Manual mode, because the configuration is static and IP addresses do not change.

Solution

Configure the IPv4 interface properties manually

1. In the Kerio Control administration interface, go to Interfaces.
2. Double-click the interface.
3. In the Interface Properties dialog box, select the Native mode. The Native term means settings for a persistent connection. If you need to set up a DSL connection through and use PPPoE, see Configuring PPPoE connections.
4. Click the IPv4 tab.
5. In the Configuration drop-down list, select Manual.
6. Type the IP address, Mask, Gateway, and DNS server information manually.
   
7. (Optional) Click Define Additional IP addresses to specify more IP addresses.
   
8. Click OK.
9. Click Apply.

When you configure TCP/IP values, the routing table is updated automatically. 

Configuring IPv4 gateways and DNS servers in the Manual mode

Although an interface is in the Automatic mode, you can configure the gateway and DNS servers manually:

1. In the administration interface, go to Interfaces.
2. Double-click the interface.
3. In the Interface Properties dialog box, click the IPv4 tab.
4. In the Configuration drop-down list, select Automatic.
5. In the Gateway field, deselect Autodetect.
6. Type the gateway.
7. In the DNS server field, deselect Autodetect.
   
8. Type the DNS servers separated by a semi-colon.
9. Click OK.
10. Click Apply.

Verify that the interface is Up and you can access the Internet through the interface.

Configuring IPv6 settings

IPv6 settings are completely independent of IPv4 settings.

IPv6 settings for network interfaces have three possible modes:

• Automatic — Kerio Control supports SLAAC.
• Manual
• Link-Local only — In this mode, the interface supports only the Link-Local addresses and sees only devices in the subnet.

By default, IPv6 is disabled on all interfaces.