Other computers cannot ping my computer

[ashok Kumar]

Try traceroute to your machine from other machines and see the path it
follows,

/bin/traceroute  <your IP>

Also, try

/usr/sbin/tcpdump -n          (add -i <interface> also to listen to a
particular interface )

on your machine while the other machine ping to your machine.  You will see
repetitive messages like the following in your machine when ping works.

14:14:37.116336 IP 192.168.5.1 > 192.168.5.3: icmp 64: echo request seq 5
14:14:37.116473 IP 192.168.5.3 > 192.168.5.1: icmp 64: echo reply seq 5

try whether you get any hints from the output, especially from the IP
address.

--
regards,
Ashok.