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511: 'Unknown clients then have all traffic blocked, except for that on TCP port 80, which is sent to a HTTP server (the "login server") dedicated to "logging in" unknown clients, and of course traffic to the login server itself.'

Ugh. Couldn't this be more generic?

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That section is descriptive of current practice. The semantics of 511 are the previous section.

Agreed. Is the login server not allowed to run on port 443? Is it not permissible to redirect HTTP traffic on other ports such as 8080 and 9006?

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