On Sun, 2013-07-28 at 20:36 -0400, Buck Huppmann wrote: 
> depends what reserved is defined as, but if it's 1024, then it's
> untrusted as well.  per rresvport(3):
?? 
       CAP_NET_BIND_SERVICE
              Bind  a socket to Internet domain privileged ports (port numbers
              less than 1024).

Trying out:
$ id
uid=1000

$ nc -l 20000
$ nc -l 400
nc: Permission denied
$ nc -l 50
nc: Permission denied
$ nc -l 512
nc: Permission denied


Cheers,
Chris.

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