Getting "Packet filtered" when try to ping a host.

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http://www.linuxquestions.org – Hello Everyone. I am facing some kind of issues when I am trying to ping a specific host from my Red Hat machine.If I ping a some different subnet, it works just fine. Let say I have 3 hosts-A,B,C. Ex:-From host A to B:- ping PING ( 56(84) bytes of data. From icmp_seq=1 Packet filtered From icmp_seq=2 Packet filtered From icmp_seq=3 Packet filtered From the same client A to C, ping works just fine:- ping PING ( 56(84) bytes of data. 64 bytes from icmp_s (HowTos)