Would anyone like to comment on the security issues involved in going beyond proxies and adding filter rules for ports such as those used by ICQ, Hotmail Messenger, Napster etc.?
In the general case, I have found most services can run happily without a single rule in the filters by using the proxies provided. However, I think a post or two discussing which ports are used for which of these other services, which are wise and unwise to permit, and what security issues may arise from them, would be most useful to many of us newer users.
Justin.
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