Breaking the internet (hotels, guestnet style)
stephen at sprunk.org
Wed Dec 9 12:41:54 CST 2009
Jens Link wrote:
> Owen DeLong <owen at delong.com> writes:
>> I expect my connections to my mail server to actually reach my mail server. I use TLS and SMTP AUTH as well as IMAP/SSL. Many of the "just works" settings in question break these things badly.
> One of my customers has an appliance for his WLAN guest access access
> which filters out AAAA records. :-(
> jens at bowmore:~$ dig AAAA www.quux.de @184.108.40.206 +short
> jens at bowmore:~$
That, unfortunately, is not uncommon. Actually, it's one of the _less_
broken systems I've seen, since IPv4 presumably keeps working.
One major vendor of hotel guestnet equipment returns an A record for
0.0.0.1 if you do an ANY or AAAA query for any hostname--even ones that
don't exist. At least with WinXP, you have to disable IPv6 just to get
IPv4 to work! Worse, their tech support sees nothing wrong with this;
if you disagree, all they'll do is offer a refund. Unfortunately, "take
your money elsewhere" doesn't work when you've already paid for the
hotel room--and they know it.
Stephen Sprunk "God does not play dice." --Albert Einstein
CCIE #3723 "God is an inveterate gambler, and He throws the
K5SSS dice at every possible opportunity." --Stephen Hawking
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