I am using xp ICS to share connection. Server has a shared folder and all clients access the server. Now want I want to do is to make sure that none of the clients can even connect to anyway to counter arp flooding, dos attacks etc.I want them to continue using server shared folder but to disable all types on intra access between other clients without installing 3d party firewall.

I have already enables xp's firewall with no exception checked but it still leaves many holes open.
One solution that came to my mind was using fake arp batch file on all clients but its a pain to load it everytime pc starts.