I thought port 0 was never valid as either source or destination.

On Wed, 27 Jul 2016 11:22:06 +0300
"Ejaz" <[email protected]> wrote:

> 
> Thanks you. 
> 
> The traffic will go to router which is handled by the Network dept.
> The fear  that may router can crash   if we  start enabling the
> packet capture since it is layer 7. 
> 
> Is advisable,  if we  deny outbound UDP port 0  from the DNS servers,
> after enabling firewall.
> 
> 
> Ejaz 
> 
> -----Original Message-----
> From: S Carr [mailto:[email protected]] 
> Sent: Wednesday, July 27, 2016 10:51 AM
> To: Ejaz <[email protected]>
> Cc: bind-users <[email protected]>
> Subject: Re: outgoing-traffic
> 
> On 27 July 2016 at 08:41, Ejaz <[email protected]> wrote:
> > Thanks for all.
> >
> > But the strange thing is that if the request comes on 53 port then
> > it should go only from 53 is it?? Why goes out from 0, any clue
> > would be highly appreciate.
> >
> > Regards
> > Ejaz
> 
> Where's the packet capture to review?
> 
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