[newbie] ping doesn't ping

[aortiz]

I've tried to connect mywindows 95 and mandrake 7.1 but i don't get a
response from neither computer.  What I mean is that I am able to ping
each macine to its own IP address ( i can even ping web site from each
machine) but when trying to ping the other machine in my LAN it does not
work.  I check all connections, cables,  configurations and everything
it's fine according to the instructions. what can be impeding these two
machines to talk to each other?