CONNECTIVITY ACROSS FIREWALLS

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  1. Important ports for firewall configuration include 25 SMTP, 80 HTTP, 88 Kerberos, 110 POP3, 119 NNTP, 135 RPC, 143 IMAP4, 389 LDAP, 443 HTTP/SSL, 636 LDAP/SSL, 993 IMAP4/SSL, 995 POP3/SSL, and 3268/3269 GC Lookup.

  2. Configure MAPI access across firewalls by setting up a VPN, using SSL-secured IMAP, using OWA on a front-end server located on the DMZ, or if using Outlook 2003, implementing RPC over HTTP.

  3. An ISA server on the DMZ can be used in place of a front-end server. ISA checks for malicious traffic before forwarding to back-end servers.

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    Implementing and Managing Exchange Server 2003 Exam Cram 2 Exam 70-284
    MCSA/MCSE Implementing and Managing Exchange Server 2003 Exam Cram 2 (Exam Cram 70-284)
    ISBN: 0789730987
    EAN: 2147483647
    Year: 2004
    Pages: 171

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