Windows/Linux network

[Randy Donohoe]

This is probably a Windows issue, so be forewarned. I have DSL coming
into a single-port modem. A Cat 5 patch cable connects it to a Linksys 5
port switch. A Windows XP box acts as the server using Internet
Connection Sharing. Downline is two more XP boxes and a Mandrake 8.2
box. The problem is I can pull any URL on the XP server box and the
Mandrake box, but can only pull some URL's on the other two XP boxes. I
can ping or trace route any URL on these two, put can't pull the page
with  Explorer. So far all the ones I can't pull seem to have some type
of security features. It isn't a DNS caching issue, done checked that.
Could it be anything on the Mandrake box? I know it seems kind of far
fetched, but I'm running out of options.
Thanks,
Randy Donohoe