Cannot ping local systems - but local systems can access internet

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http://www.linuxquestions.org – I have two CentOS 6.4 x86_64 systems. Fairly new installs. They are both connected via ethernet cable to the same wireless router. They can both reach the internet. The IP addresses are being set dynamically. They are and Code: # ping PING ( 56(84) bytes of data. From icmp_seq=2 Destination Host Unreachable From icmp_seq=3 Destination Host Unreachable From icmp_seq=4 Destination Host Unreachable (HowTos)