From: Daniel Kutchin (daniel@kutchin.com)
Date: Sun Aug 13 2006 - 21:06:04 ART
Victor -
For NTP, it is easy - the source and destination ports are the same -
udp/123
:-)
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Victor Cappuccio
Sent: Montag, 14. August 2006 01:18
To: 'Edouard Zorrilla'; 'sabrina pittarel'; 'Group Study (E-mail)'
Subject: RE: Question on ACLs and TCP/UDP ports
I have my personal opinion about a server listening and sending
For example:
The NIST servers listen for a NTP request on port 123, and respond by
sending a udp/ip data packet in the NTP format. The data packet includes a
64-bit timestamp containing the time in UTC seconds since January 1, 1900
with a resolution of 200 ps.
Or a well Known application routing Protocol like RIPv2, sends and listens
in UDP 520 right?
But for the question, is an Application Sending at That X UDP Port to a
Server, just like Edouard states
-----Mensaje original-----
De: nobody@groupstudy.com [mailto:nobody@groupstudy.com] En nombre de
Edouard Zorrilla Enviado el: Domingo, 13 de Agosto de 2006 06:34 p.m.
Para: sabrina pittarel; Group Study (E-mail)
Asunto: Re: Question on ACLs and TCP/UDP ports
If client, destination port. If server, It is as a listening state, it does
not send any, it receive data.
HIH
----- Original Message -----
From: "sabrina pittarel" <sabri_esame@yahoo.com>
To: "Group Study (E-mail)" <ccielab@groupstudy.com>
Sent: Sunday, August 13, 2006 5:20 PM
Subject: Question on ACLs and TCP/UDP ports
> Hi all,
> when I'm told that an application send traffic using
> UDP port X, how should I interpret that?
> As a destination or as a source port?
> Some time the application runs on a client, sometime
> on a server.
> My first instict would be to use that information as a
> destination port for traffic generated by the client
> and as a source port for traffic generated by the
> server...but I'm not sure that's correct. Looking at
> many of the solutions in the IEWB it seems like it is
> always used as destination port.
>
> Is there anything in the wording I should pay
> attention to?
>
>
> Thanks
> Sabrina
>
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