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Thread: Ping Problems ubuntu 12.04

  1. #1
    Join Date
    Aug 2013
    Beans
    3

    Ping Problems ubuntu 12.04

    Hi People

    I hope someone can help here.
    I installed Ubuntu 12.04 Server fresh install. It is connected to a local network 192.168.33.0/24.
    I assigned a static IP:
    auto lo
    iface lo inet loopback
    auto eth0
    iface eth0 inet static
    address 192.168.33.250
    netmask 255.255.255.0
    network 192.168.33.0
    broadcast 192.168.33.255
    gateway 192.168.33.1
    dns-search XXX.co.za
    dns-nameservers 192.168.33.1 41.xxx.xxx.xxx
    When I ping a local PC within my network using the IP, I receive a normal responce:
    ping 192.168.33.150
    PING 192.168.33.150 (192.168.33.150) 56(84) bytes of data.
    64 bytes from 192.168.33.150: icmp_req=1 ttl=128 time=0.679 ms
    64 bytes from 192.168.33.150: icmp_req=2 ttl=128 time=0.623 ms
    64 bytes from 192.168.33.150: icmp_req=3 ttl=128 time=0.489 ms
    But when I ping the same PC using the computer name "Martin-Ltp", it seems as if my ping heads out into the open www, and replies with a different IP:
    ping Martin-Ltp
    PING Martin-Ltp.iplan.co.za (196.41.3.18) 56(84) bytes of data.
    64 bytes from saXXXXX.xxxx.co.za (196.41.xxx.xxx): icmp_req=1 ttl=52 time=11.5 ms
    64 bytes from saXXXXX.xxxx.co.za (196.41.xxx.xxx): icmp_req=2 ttl=52 time=13.9 ms
    64 bytes from saXXXXX.xxxx.co.za (196.41.xxx.xxx): icmp_req=3 ttl=52 time=12.2 ms
    What an i missing?
    How do I fix this???

    Thanks!

  2. #2
    Join Date
    Mar 2006
    Location
    Arlington VA USA
    Beans
    428
    Distro
    Xubuntu 14.04 Trusty Tahr

    Re: Ping Problems ubuntu 12.04

    You can add this line to the /etc/hosts file:

    192.168.33.150 Martin-Ltp

  3. #3
    Join Date
    Aug 2013
    Beans
    3

    Re: Ping Problems ubuntu 12.04

    Thanks for the reply.
    Yes it is possible to fix it that way but my problem is this.
    I use Cacti to monitor the network and I need to monitor some laptops that has more than one network interface. Thus breaking my monitoring every time they change from LAN to Wireless. Some of these machines will also leave the office and head back to the office a month later, causing an IP change on the DHCP server due to the IP release.
    Now I can go and setup Static IP's on the Firewall, but please, that's a last last last resort.
    Could the problem be on my Firewall Server (Endian)?

  4. #4
    Join Date
    Aug 2013
    Beans
    3

    Re: Ping Problems ubuntu 12.04

    \
    Last edited by martin24; August 28th, 2013 at 03:23 PM.

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