Kelly Jones
Mon, 27 Nov 2006 18:20:48 -0800

Aristotle and everyone,

My apologies for posting to the wrong list. My idea was that writing a
DNS server that can return anything (no silly "zone files") was to buy
a domain (let's say "ktjones.com) and set it up to do the following:

1. Have fortune.ktjones.com return a random fortune (TXT record with a
TTL of 1 second, though most nameservers will cache it for longer)

2. Have mirror.ktjones.com return the IP address of the requestor (so
you can see where your DNS queries *really* go)

3. Have time.ktjones.com return the current time (either as a TXT
record or the result of Perl's time() converted to IP address format)
w/ a TTL of 1 second-- see how long your DNS server caches 1 second TTLs.

4. Have ttl-[n].time.ktjones.com do the same thing but with a TTL of n seconds.

5. Have http.url.with.slashes.replaced.by.dots.ktjones.com return (TXT
record) the contents of a specified URL, perhaps adding a "part[n]"
parameter if TXT record size is limited. Added bonuses:

5a. Quasi-anonymizes web access (almost everyone proxies DNS
requests, and it's UDP)

5b. Caches web content on nameservers -- content from more popular
webservers will be available on multiple nameservers, even if the
site itself goes down

5c. UDP more efficient than TCP?

5d. Pollutes the DNS namespace :)

6. Scaled-down version of above (limited size TXT records):

6a. "stocksymbol.stock.ktjones.com" return a stock quote

6b. "metarsymbol.metar.ktjones.com" return the latest METAR (weather) for
    a given METAR code

6c. "content.email-address.email.ktjones.com" sends an email to
someone (yeah, this could admittedly be abused)

6d. "content.(screename|phonenumber).(aim|sms).ktjones.com" could
send an AIM message or SMS to someone

I guess I should've posted to fun-with-DNS, but I don't think that exists!

wicked & twisted!

Rzeczywiście, to wiele tłumaczy