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Hey Chris, how does the IP redirection differ from the HTTP? I was reading a presentation online and the way they worded things, HTTP redirection doesn't require DNS, but another source (may have been wikipedia) suggested HTTP redirection also uses DNS partially?
– William
Commented Dec 28, 2011 at 23:18
@Daniel - http redirection does not require DNS, but it can use it - it could specify the redirected host by hostname rather than by IP (usually it is by IP).
– Paul
Commented Dec 29, 2011 at 7:51
Neither approach requires DNS. When building a captive portal system be wary of DNS as it's unnecessary (you can use IP addresses if they're predictable) and it's a point of failure (requires a net connection, or else requires embedding a full DNS server and configuring the thing - either way you added a moving part.)
– Chris Adams
Commented Dec 29, 2011 at 14:57

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