I was unable to ping to (our firewall) Netware 5 or (our one nameserver ) BSD 3.2 with ping from RH6.2 or RH7.0. The ping on RH6.0 still works fine. Could it be a setup problem ( - all seems to be right)?
On both RH6.2 and RH7.0 their respective ping versions (from i386 machines) would not respond from those remote servers (one might be a solaris), whereas the older ping version on the newer RH does respond well.
What happens if you disable reverse DNS by doing "ping -n ..."?
Disabling DNS reverse with -n resolved my problem. Sorry! or should I say thanks!