Re:NeverSSL
by jandrese on Wednesday January 11, 2017 @04:42PM
(#13377744)
I just make up fake sites to see if I'm stuck behind a captive portal because too many times I've accidentally loaded a cached version instead and not realized that I'm being blocked. fjiodfakliew.com or something.
The most sensible option would be a DHCP extension that indicates you are behind a portal and gives the IP to load, but this requires updates to every DHCP server and client, so it would take many years before it works reliably. Also, it fails for IPv6, but a modification to the Router Advertisement message could maybe do the same thing. It's a little scarier in this regard because it would be even easier to abuse.
The most sensible option would be a DHCP extension that indicates you are behind a portal and gives the IP to load, but this requires updates to every DHCP server and client, so it would take many years before it works reliably. Also, it fails for IPv6, but a modification to the Router Advertisement message could maybe do the same thing. It's a little scarier in this regard because it would be even easier to abuse.