RE: External clients & firewall not in a domain

  • From: "Mike Liddekee" <mliddekee@xxxxxxxxx>
  • To: "[ExchangeList]" <exchangelist@xxxxxxxxxxxxx>
  • Date: Fri, 5 Sep 2003 08:02:50 -0500

The only way for outlook to log in from the outside (even though you
already have the ip open) is to have several ports open at that address.
However opening those ports blindly to the internet == BAD.  Repeat
after me... "I will not open up my network to hackers"

 

Since you're using Exch2K, You would have really two options:  1) VPN
and 2) OWA.  Of course I guess you could do dial-up RAS but does anybody
actually still use that stuff?  :-)

 

We use a combination of VPN & OWA here at our facility and have a number
of users who travel frequently with laptops.  Do you have any type of
firewall in place besides the ISA server?

 

 

Regards,

Mike Liddekee

Network Engineer

 

Humco Holding Group, Inc.

7400 Alumax Dr. 

Texarkana, TX  75501

Ph:  (903) 831-7808 ext 697

 

-----Original Message-----
From: Varga Pavol [mailto:pavol.varga@xxxxxxxxxxx] 
Sent: Friday, September 05, 2003 1:11 AM
To: [ExchangeList]
Subject: [exchangelist] RE: External clients & firewall not in a domain

 

http://www.MSExchange.org/

    Hello Tom,

    we use M$Outlook 2000, and we want access ours mailboxes for
e-mailing.

    Regards!

    Pavol.

 

    

-----Original Message-----
From: Thomas W Shinder [mailto:tshinder@xxxxxxxxxxxxxxxxxx] 
Sent: Thursday, September 04, 2003 9:44 PM
To: [ExchangeList]
Subject: [exchangelist] RE: External clients & firewall not in a domain

http://www.MSExchange.org/

Hi Varga,

 

What services do you want to access from the external Outlook client?
What version of Outlook are you using?

 

Thanks!

Tom

 

 

Thomas W Shinder

 <http://www.isaserver.org/shinder> www.isaserver.org/shinder 

ISA Server and Beyond: http://tinyurl.com/1jq1

Configuring ISA Server:  <http://tinyurl.com/1llp>
http://tinyurl.com/1llp

 

-----Original Message-----
From: Varga Pavol [mailto:pavol.varga@xxxxxxxxxxx] 
Sent: Thursday, September 04, 2003 2:29 PM
To: [ExchangeList]
Subject: [exchangelist] External clients & firewall not in a domain

http://www.MSExchange.org/



        
        Hi all, 
        please, how to configure firewall (which is not in domain) and
Exchange 2k Server (with internal IP) to allow external client access to
their mailboxes?

        
        I have already set: 
        Exchange 2k Server 
        - Active Directory\Users\Properties\Dial-in\Remote Access
Permission (Dial-in or VPN)\Allow access & No Callback

        ISA Server (firewall & proxy server, not in a domain) 
        - Access Policy: 
                Mail wizard rule SMTP, SMTPs 
                outgoing smtp, pop3, imap4 
                ssh, imcp, dns 
                + IP Packet filters VPN (PPTP, L2TP), DHCP, DNS, ICMP 

        I was trying also to configure Outlook account with external IP
of firewall = Outlook could not logon. 
        Is VPN configuring both client and servers only way to resolve
it? And how? 

        Thank for any advice. 

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Network Security Library: http://www.secinf.net/
Windows 2000/NT Fax Solutions: http://www.ntfaxfaq.com
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