Re: XP Pro does not map Computer Names to Network IP addresses Why?

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Dennis@xxxxxxxxxx wrote:

>I want to block my Son's access to any shared folders but not the printer that
>is on a USB linksys Server.
>
>My Sons laptop has to have a dynamic IP because he has to connect at school
>which has a different set of internal IP's than my router.
>
>As an experiment I set my Laptop to a fixed IP address and on the desktop ZAP I
>deleted all Trusted DHCP zones. I could not delete the trusted network in ZAP
>which was xxx.xxx.1.0/255.255.255.0 for ZAP would not allow.
>
>The laptop still had full access to the desktop's folders.
>
>I blocked xxx.xxx.1.1 to xxx.xxx.1.255 in ZAP but I could still access the
>decktop computers shared files.

In experimenting, I assigned fixed sequencial IP's to the computers that need to
share files. In the router I have the DHCP Server assign the starting IP
addresses outside of my fixed IP range. In ZAP I block all IP's outside this
range. This seemed to block those computers that were outside the fixed IP
range. If I set the subnet to 255.255.255.240 this will limit the total IP's to
15

The problem is that if a hacker was able to determine my fixed IPs and one of or
more of the computers with a fixed IP was not up the hacker would be able to
access the shared files. A lot of if's but possible?

>
>How do you block all IPs except those that you trust?
>
>Thanks.

.

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