If you find that pages that should be in the cache are taking longer to appear than they should, make sure the preference is not set to Every Time , because the verification requires a network connection that takes time. Note that you can always obtain page revisions by clicking Reload in the toolbar. Navigator checks the network server and, if the page is unchanged, a copy is retrieved from the cache. If the page has changed, a copy is transmitted from the network server. The Proxies Panel Ordinarily, Communicator does not require proxies to interact with the network services of external sources.
Firewalls protect information in internal computer networks from external access.
In doing so, firewalls might limit Communicator's ability to exchange information with external sources. To overcome this limitation, Communicator can interact with proxy software. A proxy server sits atop a firewall and acts as a conduit, providing a specific connection for each network service protocol. If you are running Communicator on an internal network from behind a firewall, you'll need from your system administrator the names and associated port numbers for the server running proxy software for each network service. Proxy software retains the ability to communicate with external sources, yet is trusted to communicate with the internal network.