That's an easy explaination. And you won't be able to fix it.
When Outlook connects to the Exchange server, it registers its local IP
address as the destination for new mail notifications.
The Cisco 3000 series (formerly Altiga) clients install a network shim
(deterministic network enhancer) that hooks the lower end of the IP stack,
and intercepts packets destined for the networks specified in the
concentrator. The client side IP stack doesn't know of the IP address
assigned to your tunnel. The MS PPTP client, on the other hand, changes your
local IP address to be the one assigned as part of the tunnel, so Outlook
sees the tunnel address and registers that to Exchange for notifications.
Roger
------------------------------------------------------
Roger D. Seielstad - MCSE MCT
Senior Network Administrator
Peregrine Systems
Atlanta, GA
http://www.peregrine.com
> -----Original Message-----
> From: Kevin Derby [mailto:[EMAIL PROTECTED]]
> Sent: Tuesday, August 14, 2001 11:59 PM
> To: Exchange Discussions
> Subject: Re: New mail notification port(s)
>
>
> Um, no.
>
> There's no new mail notify over our Cisco VPN system, but we
> have another
> legacy system that allows those packets through. I'm trying
> to do research
> so my network guys have something to work with.
>
> Kevin
>
> ----- Original Message -----
> From: "missy koslosky" <[EMAIL PROTECTED]>
> To: "Exchange Discussions" <[EMAIL PROTECTED]>
> Sent: Tuesday, August 14, 2001 7:31 PM
> Subject: Re: New mail notification port(s)
>
>
> > Lemme guess... You work for an ASP, or a company that
> wants to at least
> > host some Exchange services...
> >
> > It's completely random, from what MS has said in the past.
> And there's no
> > way to un-randomize it, and it can't be changed.
> Apparently the three
> lines
> > (whatever) of code that control this were too hard to
> rewrite for E2K
> too...
> >
> > Missy
> > ----- Original Message -----
> > From: "Kevin Derby" <[EMAIL PROTECTED]>
> > To: "Exchange Discussions" <[EMAIL PROTECTED]>
> > Sent: Tuesday, August 14, 2001 7:24 PM
> > Subject: New mail notification port(s)
> >
> >
> > Does anyone know the theory behind the randomization of new mail
> > notification ports? I understand that it can be anywhere
> between 1024 and
> > 65k. Is that one for each client, picked randomly from
> what's unused, or
> is
> > there something else to it?
> >
> > Kevin
> >
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