External clients & firewall not in a domain

From: "Varga Pavol" <pavol.varga@xxxxxxxxxxx>
To: <exchangelist@xxxxxxxxxxxxx>
Date: Thu, 4 Sep 2003 21:29:13 +0200

        
        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.

External clients & firewall not in a domain

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