4 part domain names

Dick Davies rasputnik at hellooperator.net
Wed Nov 24 10:55:28 PST 2004

* Peter Risdon <peter at circlesquared.com> [1153 16:53]:

> >For example, I can create a host in example.com called
> > 
> >us.510.mail
> >
> >and you can't stop me (evil laughter).

> Sent the RFC mail prematurely...
> RFC 952 says:
> <quote> A "name" (Net, Host, Gateway, or Domain name) is a text string 
> up to 24 characters drawn from the alphabet (A-Z), digits (0-9), minus 
> sign (-), and period (.). Note that periods are only allowed when they 
> serve to delimit components of "domain style names". (See RFC-921, 
> "Domain Name System Implementation Schedule", for background).
> </quote>
> So I guess you could, but it wouldn't be canonical. If authority ever 
> gets delegated for mail.example.com, then for 510.mail.example.com, then 
> a host called us is published, there's going to be a bit of a problem 
> with your network.

Oh my god yes. I've done this for <shudder>customers</shudder>.
It works. And is horribly confusing for everyone.

I stand by my demented cackle ^_^

Rasputin :: Jack of All Trades - Master of Nuns

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