quoted from Troubleshooting Windows Server2003 SP1 Issues
Can't enable windows Firewall on a RRAS server - Windows firewall cannot run because another program or service is running that might use the network address translation component (Ipnat.sys)
Situation: one of our clients could not get the windows Firewall to work. Whenever they tried to start the Windows Firewall, they received the following message: "Windows firewall cannot run because another program or service is running that might use the network address translation component (Ipnat.sys).
What they tried:
They event tried to stop the RRAS but got the same result. They finally make it work by disabling the RRAS.
Recommendation: It is not recommended to use Windows Firewall on a RRAS server. If you use the server as a router, you should enable NAT; if you use the server as VPN, you should have another firewall.
Related Topics
Don't run Windows Firewall on RRAS
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Hello,
i have a Windows Server 2003 SP1 - Standard Edition.
I want to use the Windows Firewall but every time i start it (Control
Panel/Service) I get this message:
"Windows Firewall cannot start because another program or service is running
that might use the network address translation component (Ipnat.sys)"
I'm using RRAS for VPN calls.
Thank you all
