Is it safe to forward ports 53,80, and 443 on my firewall so that public users can access thier exchange accounts? This is what I got:
DSL Connection
NAT/Firewall
Router
Various switches
Server1(Domain controller and DNS server)
Server2(Redundant Domain controller/DNS)
Server3(IIS server/MS SQL server)
Server4(MS exchange server/IIS)
Server5(file/backup)
*All servers are running W2k3
The request will be forwarded to the DNS server, then to the Exchange server.
