kerio control proxy Configuring proxy server

 Configuring proxy server

Even though the NAT technology used in Kerio Control enables direct access to the Internet from all local hosts, it contains a standard non-transparent proxy server.

You can use it, for example, when Kerio Control is deployed within a network with many hosts where proxy server has been used. Thus, the Internet connection is kept if proxy server is used, and you don't have to re-configure all the host (or only some hosts require re-configuration).

NOTE

The proxy server can be used for HTTP, HTTPS and FTP protocols. Proxy server does not support the SOCKS protocol kerio control proxy.

WARNING

If you use a non-transparent proxy server, the filtering of HTTPS connections does not work.

Configuring the proxy server

In the administration interface, go to Proxy Server.

Select option Enable non-transparent proxy server. This option enables the HTTP proxy server in Kerio Control on the port in the Port entry (3128 port is set by the default) at kerio control proxy.

To enable a tunnelled connection on non-standard TCP ports (for example, connecting to remote Kerio Control administration placed in the Internet from your local network), select option Allow tunnelled connections to all TCP ports.

NOTE

This option affects HTTPS traffic only. You can always access HTTP on any port via non-transparent proxy kerio control proxy.

Configuring browsers

To communicate through non-transparent proxy server, you must configure web browsers on client hosts. You have several options for this configuration:

Configure browsers manually: type the IP address or DNS name of the proxy server and port (3128 is the default port for Kerio Control) in the proxy server settings in the browser

In the Kerio Control administration in the Proxy Server section, switch the mode for automatic proxy configuration script to Kerio Control non-transparent proxy server, and add the following address to the browsers settings: http://192.168.1.1:3128/pac/proxy.pac where 192.168.1.1 is the IP address of the Kerio Control host and number 3128 represents the port of the proxy server (see above).

In the Kerio Control administration in the Proxy Server section, switch the mode for automatic proxy configuration script to Allow browsers to use configuration script automatically via DHCP server in Kerio Control. All browsers must select Automatically detect settings in the proxy server settings.

NOTE

The automatic configuration of browsers may take several hours. Browsers must ask for a new configuration.

Forwarding to parent proxy server

You can use a parent proxy server for non-transparent proxy traffic, update checks, Kerio Antivirus updates downloads, and for connecting to the online Kerio Control Web Filter databases.

In the administration interface, go to Proxy Server.

Select Use parent proxy server.

Type the IP address or the DNS name of the parent proxy server to the Server field.

Type a port number behind the colon.

If your provider gives you credentials for authentication, select option Parent proxy server requires authentication and type the credentials.

NOTE

Credentials are sent with each HTTP request. Only Basic authentication is supported.

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