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#### 3.2.1 Allowed ports

A TCP service is identified not only by the IP address of the machine it is running on, but also by a small integer, the TCP port it is listening on. Normally, web servers listen on port 80, but it is not uncommon to have them listen on different ports; Polipo's internal web server, for example, listens on port 8123 by default.

The variable `allowedPorts` contains the list of ports that Polipo will accept to connect to on behalf of clients; it defaults to ``80-100, 1024-65535`'. Set this variable to ``1-65535`' if your clients (and the web pages they consult!) are fully trusted. (The variable `allowedPorts` is not considered for tunnelled connections; see Tunnelling connections).