[LINK] OT(?) UDP above port 32767

[Kim Holburn]

On 2007/Feb/07, at 2:15 AM, Daniel Rose wrote:
> Hi,
>
> I've come across an odd problem and the usual resources (Google, uni
> books) don't help me much.

http://en.wikipedia.org/wiki/List_of_TCP_and_UDP_port_numbers

> Can some of you Unix elders explain to me why UDP traffic to/from  
> ports
> above or below 32767 should be treated differently by a firewall?

If you have NAT and rules for VOIP, H323 SIP etc then you might get  
such a pattern.

> Specifically, what might be special about ports above this number  
> which
> makes the traffic permissable, where traffic involving a port below
> 32767 is blocked?
>
> Linux selects a port above this magic number for my application to  
> send
> a UDP client request from, Windows does not.
>
> Thanks in advance...
>
>
> --
> Daniel Rose
> Business Systems Support
> National Library of Australia
> ph 6262 1599 -- fx 6273 3648
>
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--
Kim Holburn
IT Network & Security Consultant
Ph: +39 06 855 4294  M: +39 3342707610
mailto:kim at holburn.net  aim://kimholburn
skype://kholburn - PGP Public Key on request

Democracy imposed from without is the severest form of tyranny.
                           -- Lloyd Biggle, Jr. Analog, Apr 1961