+ Post New Thread
Results 1 to 6 of 6
Wireless Networks Thread, IP Conflict in Technical; Hiya - Ok here is the scenario. It appears a laptop has returned at the start of this term having ...
  1. #1

    Join Date
    Jul 2009
    Posts
    30
    Thank Post
    0
    Thanked 4 Times in 3 Posts
    Rep Power
    11

    IP Conflict

    Hiya -

    Ok here is the scenario. It appears a laptop has returned at the start of this term having had a static IP address manually configured (presumably an enthusiastic family member setting it up on a home network), which just so happens to be one of our servers IP address and is therefore causing havoc.

    I appreciate steps should be in place to prevent such a scenario, namely even the local administrator should be locked from changing IP setting to anything other than DHCP, but in the short term, does anyone have any suggestions of actively finding the culprits hostname perhaps?

    I have tried temporarily changing the server IP to something else to let the rogue machine take the IP address and then seeing if I can ping/browse/poke/port scan it etc. but pesky local client firewall is blocking any thing like that.

    Short of mass email saying "If you have a IP address conflict" message please come and see me to everyone I am a bit stumped.

    Any ideas?

    Thanks in advance.

    Andrew

  2. #2

    Michael's Avatar
    Join Date
    Dec 2005
    Location
    Birmingham
    Posts
    9,241
    Thank Post
    239
    Thanked 1,567 Times in 1,249 Posts
    Rep Power
    339
    So are you using a Class C type network i.e 192.168.1.1 for example? What IP has the server been allocated? If it is the first, second or third IP personally I would change this immediately to avoid problems.

  3. #3
    leco's Avatar
    Join Date
    Nov 2006
    Location
    West Yorkshire
    Posts
    2,026
    Thank Post
    595
    Thanked 125 Times in 119 Posts
    Rep Power
    41
    This might help?

  4. #4

    Join Date
    Aug 2005
    Location
    London
    Posts
    3,154
    Thank Post
    114
    Thanked 527 Times in 450 Posts
    Blog Entries
    2
    Rep Power
    123
    eventvwr on the server should give you the MAC address of the machine causing the problem. Do you have a database of MAC addresses? If so, you can then find the machine from that. If not, do you have managed switches which can give you their arp tables - that will let you find the switch port?

  5. #5

    Join Date
    Jul 2009
    Posts
    30
    Thank Post
    0
    Thanked 4 Times in 3 Posts
    Rep Power
    11
    Quote Originally Posted by Michael View Post
    So are you using a Class C type network i.e 192.168.1.1 for example? What IP has the server been allocated? If it is the first, second or third IP personally I would change this immediately to avoid problems.
    Thanks for this, as mentioned, I fully intend to put bits and pieces in place (MAC address logging etc) and change the IP schema's in the future but only just started here, so have inherited a rather..hobbyist setup network. Unfortunately, to make this schema change would require downtime and all clients restarted (DHCP environment) so not really a "short term" option.

  6. #6
    Mr.Ben's Avatar
    Join Date
    Jan 2008
    Location
    A Pirate Ship
    Posts
    941
    Thank Post
    182
    Thanked 157 Times in 126 Posts
    Blog Entries
    2
    Rep Power
    65
    Set the lease time that the clients can hold a DHCP address down to a couple of days, then over a weekend all of the clients will need a refresh, even better, use a scheduled batch script to shut them all down on a Friday. Then you have got a few hours to make the changes and test them.

SHARE:
+ Post New Thread

Similar Threads

  1. IP Conflict
    By sippo in forum Wireless Networks
    Replies: 16
    Last Post: 7th May 2009, 09:22 PM
  2. Conflict of Policies?
    By Andie in forum Virtual Learning Platforms
    Replies: 9
    Last Post: 17th December 2008, 04:08 PM
  3. IP Conflict
    By Grommit in forum Windows
    Replies: 34
    Last Post: 4th November 2007, 10:26 AM
  4. ip conflict everywhere!
    By browolf in forum Windows
    Replies: 5
    Last Post: 26th September 2006, 02:31 PM
  5. IP Conflict
    By MManjra in forum Wireless Networks
    Replies: 8
    Last Post: 10th September 2006, 12:35 PM

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •