Kerio Tech Firewall6 - Manual (Page 121)

8.4 Proxy server
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Proxy Server Configuration
To configure proxy server parameters open the Proxy server tab in Configuration → Content
Filtering → HTTP Policy.
Figure 8.15 HTTP proxy server settings
Enable non-transparent proxy server
This option enables the HTTP proxy server in WinRoute on the port inserted in the Port
entry (3128 port is set by the default).
Warning
If you use a port number that is already used by another service or application, WinRoute
will accept this port, however, the proxy server will not be able to run and the following
report will be logged into the Error log (refer to chapter 22.8 ):
failed to bind to port 3128: another application is using this port
If you are not sure that the port you intend to use is free, click on the Apply button and
check the Error log (check whether the report has or has not been logged) immediately.