- Kerio WinRoute Firewall Administrator's Guide

Chapter 5 Settings for Interfaces and Network Services
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Figure 5.22 HTTP proxy server settings
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.
Enable connection to any TCP port
This security option enables to allow or block so called tunneling of other applica-
tion protocols (than HTTP, HTTPS and FTP) via the proxy server.
If this option is disabled, the proxy server allows to establish connection only to
the standard HTTPS port 443) — it is supposed that secured web pages are being
opened. If the option is enabled, the proxy server can establish connection to any
port. It can be a non-standard HTTPS port or tunneling of another application
protocol.
Note: This option does not affect the non-secured traffic performed by HTTP and/or
FTP. In WinRoute, HTTP traffic is controlled by a protocol inspectors which allows
only valid HTTP and FTP queries.