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CHAPTER 6

Public Folders

By default, the default public folder tree is only accessible via, MAPI, HTTP, and NNTP. Additional custom public folders are not accessible via MAPI.

Virtual Servers

By default, only SMTP and HTTP virtual servers are active. POP3, NNTP and IMAP4 must be manually started.

Front-end/Back-end Arrangement

External Firewall 443 - HTTP/SSL

OWA Front-end Server

Internal    Firewall   IPSec (DES/3DES encryption) (MD5/SHA1 hashing) 53 - DNS (front & DNS) 80 - HTTP (OWA traffic) 88 - Kerebos (front & DC's authentication) 135 - RPC (GC) 389 - LDAP (front & DC's) 1024-65535 (RPC to GC's) 3268 (LDAP to GC's)

Back-end Exchange Servers

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