Possible Duplicate:
Can’t use ping in Ubuntu

I'm not sure this question is relevant in this forum, but I really need your helps. I'm using Ubuntu 9.04, and when I do a ping to any ip or host, what I got were always 100% packet loss. This is terrible, since I cannot do many things in my textbook. Please help me to fix this problem. Thank you very much

  • 1
    What happens if you ping yourself? – gbarry Aug 12 '09 at 16:29
  • +1 to gbarry Are you sure that you are connected to a network... and if so is it dhcp? did you get an ip address? – TimK Aug 12 '09 at 16:42
  • 4
    Duplicate of superuser.com/questions/21859/cant-use-ping-in-ubuntu – Isxek Aug 12 '09 at 18:18
  • This needs to be deleted, the other question has many of the answers needed. – Troggy Aug 12 '09 at 19:42

Have you tried turning off your iptables firewall? It might be...over eager.


It's possible you have a bad network card and/or a bad patch cable. Was it working before and has now suddenly stopped?