Firewall Wizards mailing list archives
RE: PIX -> ISA -> OWA Configuration
From: "Ben Nagy" <ben () iagu net>
Date: Tue, 3 May 2005 14:54:11 +0200
Post order fixed, response inline. </whips out dusty cluestick...>
-----Original Message-----
[Jason Gomes] [...]
What is the preferred placement for a OWA front-end server given these two possible network configurations and why? 1) [Internet] <==> [PIX Firewall] <==> [ISA Proxy] <==> [PIX Firewall] <==> [OWA] <==> [Internal Net w/Exchange Svr] 2) [Internet] <==> [PIX Firewall] <==> [ISA Proxy] <==> [OWA] <==> [PIX Firewall] <==> [Internal Net w/Exchange Svr]
[Paul Melson at least has courage of his convictions]
#1, definitely.
Wow, this may be the first time I recall disagreeing with you, Paul... [Sanford Reed hides behind Microsoft documentation ;]
Per MS (Using Microsoft Exchange 2000 Front-End Servers.pdf - available from MS TechNet) it is configuration 1).
Once again proving that while MS have made a lot of progress in security some of their authors still have no idea what they are doing. The problem is that people get too excited about their architecture diagrams. I always internally parse these diagrams as: [spaghetti] --> [hackable box] --> [pot of gold] In 1) there are no controls at all between the hackable box and the pot of gold. In 2) there is. Once you simplify things the choice becomes obvious. But hey, you could throw another firewall into 2) if you want. And maybe an IPS as well. A red one, even. Cheers, ben (reliving the glory days of "grumpy old man" responses) _______________________________________________ firewall-wizards mailing list firewall-wizards () honor icsalabs com http://honor.icsalabs.com/mailman/listinfo/firewall-wizards
Current thread:
- PIX -> ISA -> OWA Configuration Jason Gomes (May 02)
- RE: PIX -> ISA -> OWA Configuration Sanford Reed (May 02)
- RE: PIX -> ISA -> OWA Configuration Ben Nagy (May 03)
- RE: PIX -> ISA -> OWA Configuration Sanford Reed (May 05)
- RE: PIX -> ISA -> OWA Configuration Ben Nagy (May 05)
- RE: PIX -> ISA -> OWA Configuration Sanford Reed (May 05)
- RE: PIX -> ISA -> OWA Configuration Ben Nagy (May 03)
- RE: PIX -> ISA -> OWA Configuration Mark Tinberg (May 05)
- RE: PIX -> ISA -> OWA Configuration Sanford Reed (May 02)
- <Possible follow-ups>
- Re: PIX -> ISA -> OWA Configuration Jason Gomes (May 03)
- RE: PIX -> ISA -> OWA Configuration Paul Melson (May 03)
- Re: PIX -> ISA -> OWA Configuration Kevin (May 05)
- Re: PIX -> ISA -> OWA Configuration Jason Gomes (May 05)
- RE: PIX -> ISA -> OWA Configuration Paul Melson (May 03)