(I'm a bit of a novice in small business server administration, so excuse any oversimplifications or general ignorance...)
I have SBS 2003 running on my Domain Controller. I have an external hw firewall (sonicwall) between my DSL modem and my server, with my server connected to a switch to the patch panel to my clients...
We are a small company (less than 10 workstations) and I have been researching and debating installing ISA server on my SBS 2003 server. I must admit because of some warnings regarding memory usage, interuption of email and internet service,...I'm leaning against it.
Anyway, when I try and configure the SBS 2003 Firewall on the server, it gives me the error (paraphrasing) - "cannot start windows firewall because another program or service may be using ipnat.sys
Research has led me to several answers - including "Firewall should not be running on a DC"
my questions are-
1) should the windows firewall be able to run on my server?
2) should I run it on my server, being it is the DC?
3) should I install the ISA, and use it in place of the windows firewall?
4) what would happen to the clients using xp pro sp2, with regard to the firewall they are using and the ISA?
Thanks for your help.