[hcs-d] interesting spam mail tactic

Geoffrey Goodell goodell at eecs.harvard.edu
Wed Apr 5 11:16:28 EDT 2006


> I'm not sure I understand why
>
> http://993787910
>
> works to begin with

Here is the answer as provided by David Holland.

Geoff

> Subject: Re: FW: Funky way of specifying URLs
> To: Systems Research At Harvard <syrah at eecs.harvard.edu>
> Date: Sat, 11 Feb 2006 13:16:44 -0500 (EST)
> From: David Holland <dholland at eecs.harvard.edu>

> My guess is that it's not mandated by any RFC, but is rather a
> feature
> of web browsers.

It's a traditional feature of inet_addr(3), which is why it works with
just about every network program.

   bowser% telnet 2365013016 80
   Trying 140.247.60.24...
   Connected to bowser.eecs.harvard.edu.
   Escape character is '^]'.

That's not the only such form that's accepted, either:

   bowser% telnet 140.247.15384 80
   Trying 140.247.60.24...
   Connected to bowser.eecs.harvard.edu.
   Escape character is '^]'.


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