Re: Remote Mail Users

[Patrick Belliotti <pbelliot () radium ncsc mil>]

Doesn't Exchange offer a POP3 option (and is that what you mean by
acting as an SMTP post office)?  I know we had that up and running where
I used to work.  I believe we were using Exchange 5?  Not sure.

Anyway, if it does, that solves the problem, right?  

With SmartGate (from V-ONE--I am quite familiar with this product, as
that's the place I used to work), the gateway still listens on the same
exact ports whether it's for POP3 or SMTP.  The change is at the client
side--the client will have two SmartGate rules, one for reading one for
sending, both talking to sgate=tcp/2023 on the SmartGate server.

So you'll have the same Exchange box acting both as your internal SMTP
mail server and POP3 server, both of which are available via a secure
SmartGate connection.

Hope this helps.

Greg Taylor wrote:
> Hi,
>
> Can I please submit a problem which has had me confused for weeks?
>
> I have an internal network of mail users using MS exchange with an exchange
> server.  The SMTP connector of this goes via a Gauntlet firewall to the Internet
> (or at least will do when we have completed configuration!)
>
> I also have a community of remote users who need to send mail by attachments to
> the main server.  The intention (for strong security reasons) is for them to use
> Smartgate providing encrytion of the link.  They will also only be allowed SMTP
> via the firewall.
>
> THE PROBLEM - Exchange server can accept SMTP mail but cannot operate as an SMTP
> post-office.  I DO NOT WANT to open any further ports in the firewall.  I have
> had suggested a POP3 server within the firewall with that connected to the SMTP
> connector of exchange but that means that any user who could be both on the
> internal network and who could work from home on a laptop would be a user on two
> main systems.  How do I ensure that whichever system they log in they get the
> same mail?  At the worst case I could accept a system where the mail is sent to
> both but can this even be improved on?
>
> Horrible picture follows:
>
> Internet ----> Firewall ----> POP3 server -----> Exchange Server ----> user
>                   |
>               Shiva Modem stack
>                   |
>              Remote laptop user.
>
> The firewall permits only ports 25 and 80.
>
> The preference would be to have the remote users also using exchange client set
> to dialup networking although I beleive(?) exchange is not POP3 compliant.
>
> Any ideas please?  I am completely stuck over this one!   :-(
>
> Greg
>
> Greg Taylor MBCS, FIAP                             gtaylor () ntyne demon co uk
> Open Systems Programme Leader
> North Tyneside Council

-- 
  |  Patrick Belliotti
  |  Computer Scientist
  |  
  |  Content of this is all my idea, and
  |  not necessarily accurate or factual.