3 ms·
> https://www.wwww.wwww.wwww.wwww.wwww.0.facebook.com/rdnation https://www.wwww.wwww.wwww.wwww.wwww.0.facebook.com/rdnation Looks like anything.0.facebook.com
by WestCoastJustin 13y ago
> https://www.wwww.wwww.wwww.wwww.wwww.0.facebook.com/rdnation https://www.wwww.wwww.wwww.wwww.wwww.0.facebook.com/rdnation
Looks like anything.0.facebook.com is an alias for z.c10r.facebook.com.
So...
$ host hackernews.0.facebook.com
hackernews.0.facebook.com is an alias for z.c10r.facebook.com.
$ host www.xyz.hackernews.0.facebook.com
www.xyz.hackernews.0.facebook.com is an alias for z.c10r.facebook.com.
It is called a Wildcard DNS record [1], which allows you to have ~.example.com go to a single IP address and have the server handle it. This is really useful for web hosting, etc, and 37signals uses it for hosting basecamp [2], so each customer gets unique name at ~.basecamp.com.
[1] http://en.wikipedia.org/wiki/Wildcard_DNS_record http://en.wikipedia.org/wiki/Wildcard_DNS_record
[2] http://37signals.com/svn/posts/1512-how-to-do-basecamp-style-subdomains-in-rails http://37signals.com/svn/posts/1512-how-to-do-basecamp-style...
- spoiledtechie 13y agoWhy would you obscure it as such?
- mcpherrinm 13y agoI couldn't help but wonder if c10r was an abbreviation (is there a name for this form of shortening?): % grep '^c..........r$' /usr/share/dict/words cabinetmaker calligrapher carpetbagger cartographer cheeseburger chiropractor collaborator commissioner communicator confectioner conquistador counteroffer countertenor
- deleted 13y ago[deleted]
- cokernel_hacker 13y agoYep, numeronyms. http://en.wikipedia.org/wiki/Numeronym http://en.wikipedia.org/wiki/Numeronym
- nly 13y agoI think c10r is probably just c-ten-r => center