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The command sudo lsof -n |grep "st=07" seem to work. To test it, I ran ping as shown below on one terminal to generate ICMP packets arul@cheetah:~$ ping localhost PING localhost (127.0.0.1) 56(84) bytes of data. 64 bytes from localhost (127.0.0.1): icmp_seq=1 ttl=64 time=0.048 ms 64 bytes from localhost (127.0.0.1): icmp_seq=2 ttl=64 time=0.049 ms On ...


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You need to add IP routing for the other networks in the laptops. This is easiest if the 172.20.51.61 machine is also the default router in your network. In this case, you need the following things: Ensure that IP routing is enabled in the router machine. Add firewall rules so that traffic between the two VLAN networks is allowed. Ensure that the two ...


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You have option routers 192.158.66.254; in your configuration, which causes the invalid default route in your client configuration. Comment out this line, and you should be left with the correct default router of 192.168.66.254.


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I think there are 2 different things at play here - The incorrect setting option routers 192.158.66.254; in your DHCP configuration. This would stop external connectivity, but is not actually the cause of your problem. The inability to ping the Windows box from the Linux boxes is most likely due to the TCP stack on the Windows box (or a firewall running ...


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From http://linux-ip.net/html/ether-arp.html: If no ARP cache entry exists for a requested destination IP, the kernel will generate mcast_solicit ARP requests until receiving an answer. During this discovery period, the ARP cache entry will be listed in an incomplete state. If the lookup does not succeed after the specified number of ARP requests, the ARP ...



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