Web Server and Reverse Proxy on one Machine??

[blakey2]

Hello All,

I am about to upgrade my mail server to exchange 2k3. I would like an apache based reverse proxy server in the DMZ to connect/secure to my mail server running OWA on IIS (behind firewall).

Additionally we host 4 small static webpages.

Need to redesign network, and I wanted to install apache on *nix and use it as our webserver, located in the DMZ.

OWA does not work on Apache web server as apparently it requires some specific IIS *.dll


Pic of scenario I would like to achieve:

    INTERNET
       |
       |
      WAN
       |
   +----------+               +----------------------+
   | Firewall |--DMZ----------| Apache Web Server    |
   +----------+               | Apache Reverse Proxy |
       |                      +----------------------+
      LAN
       |
       |
   +-------------------------------+
   | Exchange 2k3 Mail Server      |
   | IIS Outlook Web Access (OWA)  |
   +-------------------------------+

QUESTION 1: Can I implement reverse proxy and web server functionality using apache on the single machine located in the DMZ. OR do I need two seperate machines to achieve this?

QUESTION 2: Is this a resource hungry scenario? - Web pages are small, static and do not sustain many hits (accounting firm ) - What would I be able to get away with in terms of minimum hardware (PC) specs.

Opinions/thoughts suggestions are welcome.

Thanks in advance - Chris.