SMTP forwarding sends email directly to the Windows SBS/Exchange server, but what are the security implications if the Internet Security and Acceleration (ISA) server is not configured? Is the Asymmetric Digital Subscriber Line's (ADSL) built-in firewall secure enough for this solution, or should I configure the ISA server with a second network interface card (NIC)? I am trying to keep the configuration simple, but secure. Any recommendations would be greatly appreciated.
I recommend one of the two following options:
- Add a second NIC to Windows SBS and configure ISA Server as a firewall in addition to a proxy.
- Invest in a firewall appliance such as a SonicWall TZ180. Configure the appliance for your network and disable the firewall feature on the DSL modem.
If you choose the ISA Server option, you can use the Windows SBS wizard to configure ISA Server to permit inbound email and/or other services.
Do you have comments on this Ask the Expert Q&A? Let us know.
Ask an Exchange Server question in our forum.
Dig deeper on ISA Server and Firewalls for Microsoft Exchange Server
Related Q&A from Bradley Dinerman
Find out how you can avoid DNS issues related to a Exchange 2003 server only collecting email from specific POP3 domains.continue reading
Are you having trouble with duplicate appointments in your Microsoft Outlook 2003 calendar? Learn what may cause this to happen.continue reading
Learn the best way to configure the default recipient policy in an Exchange 2003 test environment.continue reading
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.