pinging from knoppix to xp

[Harry Kuhman]

I am able to ping from my XP SP2 laptop to the other Knoppix PC and also to the router(RP614v2) which is inbetween.
I connect to knoppix via putty. I am trying ping to my XP from there. No response.

First confirm that Knoppix can ping your router (192.168.xxx.1)

I assume there can be firewalls in XP, in router and also in Knoppix.

Yup, this is the common problem, particularly if you installed SP2, enabled the firewall in XP prior to SP2, or installed a 3rd party firewall. So check it's setting to enable the ping (and whatever other traffic you want to do) or disable it. I usually set up my firewalls to pass anything from "trusted" addresses. (In my case I set the range 192.168.0.0 to 192.168.255.255 as trusted. I do this because I like to test different routers that may be at 192.196.0.1, 192.168.1.1, 192.168.2.1 or elsewhere. This range is safe and will work for almost all users, but some people may prefer to set a smaller trusted range). Oh, and I never trust the Microsoft firewall. Use something better (like Kerio) rather than the MS disaster.