On 23-May-2002 at 21:28:19 Jim Grossl wrote:
> Are your saying that you have or are thinking of configuring
> your firewall to filter out packets with non-privileged ports in the
> *source* address?
>
Yes, we have...
> If you could I would think this would shutdown a great deal of incoming
> tr
On Friday 24 May 2002 02:15, Michael Doughty wrote:
> > Yes, and it is the sending port that is blocked. That is my point.
> > If a remote mail server sends a message to our mail server using a
> > non-privileged port (i.e. the port they use to send the msg to us),
> > and we block that port, then
To: [EMAIL PROTECTED]
From: John Horne
Date: Thu, 23 May 2002 09:57:44 +0100 (BST)
> On 23-May-2002 at 01:11:56 Doughty, Michael wrote:
> >
>
> Yes, and it is the sending port that is blocked. That is my point. If a
> remote mail server sends a message to our mail server using a non-privileg
-Original Message-
From: John Horne [mailto:[EMAIL PROTECTED]]
Sent: Thursday, May 23, 2002 7:10 AM
To: [EMAIL PROTECTED]
Subject: Re: non-privileged port selection - how is it done?
On 23-May-2002 at 12:56:33 Larry Mitchell wrote:
> For a service like SMTP and POP the ports the serv
John,
> Given a service such as e-mail which uses a non-privileged
> port to send mail out, are there are any specific mechanisms as
> to which port is selected? This will no doubt be dependant on the
> O/S, but is it really a random numbered port, the first
> non-privileged port it knows is
EMAIL PROTECTED]
Subject: non-privileged port selection - how is it done?
Hello,
Perhaps a newbie question, but I'm a bit stumped with this one.
Given a service such as e-mail which uses a non-privileged port to send mail
out, are there are any specific mechanisms as to which port is sele
On Wed, May 22, 2002 at 02:28:00PM +0100, John Horne wrote:
> This will no doubt be dependant on the O/S, but is it really a random
> numbered port, the first non-privileged port it knows is not in use, or does
> the O/S have any other mechanism for selecting the port?
Well, it really depends on t
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Hash: SHA1
Hi,
> Given a service such as e-mail which uses a non-privileged port to
> send mail out, are there are any specific mechanisms as to which
> port is selected? This will no doubt be dependant on the O/S, but
> is it really a random numbered port, t
On 23-May-2002 at 01:11:56 Doughty, Michael wrote:
> You are missing something. Email has a specific port associated
> with various functions. For instance, SMTP is port 25. This port
> is the one that the *server listens* on. Meaning if you want to
> send some mail to that server (A), your se
On 23-May-2002 at 12:56:33 Larry Mitchell wrote:
> For a service like SMTP and POP the ports the servers use to talk are
> actually VERY specific to my knowledge. Either being 25 for SMTP or 110
> for POP. Keep in mind that the random numbered ports are on the ORIGIN
> end not the destination. I
+, Netowrk+
Network Administrator
I.V. Net L.L.P
www.IVNET.com
- Original Message -
From: "John Horne" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Wednesday, May 22, 2002 8:28 AM
Subject: non-privileged port selection - how is it done?
> Hello,
>
> Perha
On 23-May-2002 at 00:27:11 Jay D. Dyson wrote:
>> My problem is that given that a site has a firewall blocking specific
>> non-privileged ports (e.g. ) against all IP traffic (both as a source
>> port or a destination port), if a genuine site tries to e-mail them a
>> message and the sending h
Hello,
Perhaps a newbie question, but I'm a bit stumped with this one.
Given a service such as e-mail which uses a non-privileged port to send mail
out, are there are any specific mechanisms as to which port is selected?
This will no doubt be dependant on the O/S, but is it really a random
numbe
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