Problem with Windows firewall

[cubus]

Windows XP, Home ed, SP2. Small LAN, 4 PCs. There are also few other LANs
connected to same router(ISP). We need isolate our LAN from oustside
connections, include this another LANs. Windows firewall is enabled, I
configured all firewalls for 'Custom List' IP addresses:
'File and Printer Sharing' > Edit > [TCP139,TCP445,UDP137,UDP138] > Change
scope > set in 'Custom list' window local IP of our pcs, like this:
192.168.0.22,192.168.0.23,etc

After a some time I found, that someone still can print documents in our
printer from outside LAN! Also, I tried to exclude one local IP of our
computers from 'Custom list' window, for experiment, and still can
print/share from computer that nevertheless I still could print from the PC
which has no permissible IP number.
I found also, that system change IP addresses i have set in 'Custom list'
window from 192.168.0.22 to 192.168.0.22/255.255.255.255 Why?

 

[Mark L. Ferguson]

The only tool available in Home Edition for controlling the default setting of 'simple file sharing' is the CACLS command line
utility.

162786 - Undocumented CACLS Group Permissions Capabilities: http://support.microsoft.com/default.aspx?scid=kb;en-us;Q162786

 

[Mark L. Ferguson]

I forgot to mention in my previous post, that booting to safe mode(f8 on restart), and using the default "Administrator" account,
lets you rightclick an object, and use the Sharing and Security tabs to set Permissions.