+ Post New Thread
Page 1 of 2 12 LastLast
Results 1 to 15 of 17
Wireless Networks Thread, IP Conflict in Technical; If I'm getting an IP conflict on the our PDC, which has a static address, are we in trouble? The ...
  1. #1
    sippo's Avatar
    Join Date
    May 2008
    Location
    Swindon, Wiltshire
    Posts
    1,633
    Thank Post
    126
    Thanked 170 Times in 123 Posts
    Rep Power
    93

    Exclamation IP Conflict

    If I'm getting an IP conflict on the our PDC, which has a static address, are we in trouble? The dhcp is in a completely different scope. So there is no hell in ways chance dhcp could pick up the same address.

    The only way of getting it is someone giving a pc a static address. Do you think someones playing/hacking?!


  2. #2
    ozzy's Avatar
    Join Date
    Oct 2007
    Posts
    260
    Thank Post
    39
    Thanked 39 Times in 36 Posts
    Rep Power
    21
    is the ip address of the server in the same range as default ip addresses of stuff from d-link or netgear ect(192.168.0.0), have someone plugged a wireless access point or the likes into your network.
    just a thought

  3. #3
    danrhodes's Avatar
    Join Date
    Sep 2008
    Location
    Wath Upon Dearne
    Posts
    1,513
    Thank Post
    157
    Thanked 181 Times in 150 Posts
    Rep Power
    67

    Cool IP's

    Hi,

    I don't think that you have anything to worry about, IP conflicts can be common issues if you do not keep accurate records of your static IP addresses.

    Usually these issues are caused by such things as an old printer being plugged into the network that was previously using that static IP.

    Another issues I have come accross before is Network Photocopiers, have you had your Resources Photosopier Support team out lately, if so they will have probably added it to the network for your Resources Technician to be able to print over the network, and being such helpfull guys they don's always ask for a reserved IP and just pick one that they think can't possible be used, and its always the case that because its a low range they use that its 9 / 10 times a PDC or SDC?

    Try using Tracert to resolve the Hostname of the devices so that you can track down what the other device is, a neat little tool for this would be Agilent Network analyzer Standard Edition, you have to register for it but its free and its very good.

    Let me know if you don't get this issue sorted soon and Ill dig out some more ideas for you to try.

    Dan

  4. #4

    Join Date
    Apr 2007
    Location
    Christchurch
    Posts
    418
    Thank Post
    41
    Thanked 64 Times in 62 Posts
    Rep Power
    25

    IP conflict

    Hi ... The easiest way to sort this out is to down the server and run an IP scanner from a workstation. Hopefully it will pickup the IP that is the same as the server and with luck give you a pc name/number ..

    Good Luck

    Brian
    Projector Lamps
    Save money by changing the bulb only.

  5. #5
    mullet_man's Avatar
    Join Date
    Oct 2005
    Location
    Oldham
    Posts
    726
    Thank Post
    34
    Thanked 46 Times in 45 Posts
    Rep Power
    26
    Yep just double check wireless's etc, but would suspect a teacher has been doing some home networking and messed about the IP settings on the laptop or something.

    Look for the teacher who suddenly can't access the internet/sims etc, and has no idea why.

  6. #6
    sippo's Avatar
    Join Date
    May 2008
    Location
    Swindon, Wiltshire
    Posts
    1,633
    Thank Post
    126
    Thanked 170 Times in 123 Posts
    Rep Power
    93
    Thanks for the info guys. We have actually had photocopier people in but I gave them an IP. It all seems ok now, I'm going to restart the PDC at break to make sure.

  7. #7
    sippo's Avatar
    Join Date
    May 2008
    Location
    Swindon, Wiltshire
    Posts
    1,633
    Thank Post
    126
    Thanked 170 Times in 123 Posts
    Rep Power
    93
    WTF?!!

    'We're sorry...
    ... but your query looks similar to automated requests from a computer virus or spy ware application. To protect our users, we can't process your request right now.

    We'll restore your access as quickly as possible, so try again soon. In the meantime, if you suspect that your computer or network has been infected, you might want to run a virus checker or spy ware remover to make sure that your systems are free of viruses and other spurious software.

    If you're continually receiving this error, you may be able to resolve the problem by deleting your Google cookie and revisiting Google. For browser-specific instructions, please consult your browser's online support centre.

    We apologise for the inconvenience and hope we'll see you again on Google'

    I can't see any viruses anywhere!!

  8. #8
    sippo's Avatar
    Join Date
    May 2008
    Location
    Swindon, Wiltshire
    Posts
    1,633
    Thank Post
    126
    Thanked 170 Times in 123 Posts
    Rep Power
    93
    Phew panic over!!

  9. #9
    sippo's Avatar
    Join Date
    May 2008
    Location
    Swindon, Wiltshire
    Posts
    1,633
    Thank Post
    126
    Thanked 170 Times in 123 Posts
    Rep Power
    93
    Still having this issue but on three servers. Its not dhcp as the scope is different for client PC's. Ran IP scanner cannot find the addresses with the same IP.

    It only occurs for about 5 to 10 minutes then it goes. But in that time we have users moaning. It only happens once every 3 weeks or so.

    Someone playing silly beggars?

  10. #10

    FN-GM's Avatar
    Join Date
    Jun 2007
    Location
    UK
    Posts
    15,393
    Thank Post
    797
    Thanked 1,588 Times in 1,391 Posts
    Blog Entries
    10
    Rep Power
    427
    Quote Originally Posted by sippo View Post
    WTF?!!

    'We're sorry...
    ... but your query looks similar to automated requests from a computer virus or spy ware application. To protect our users, we can't process your request right now.

    We'll restore your access as quickly as possible, so try again soon. In the meantime, if you suspect that your computer or network has been infected, you might want to run a virus checker or spy ware remover to make sure that your systems are free of viruses and other spurious software.

    If you're continually receiving this error, you may be able to resolve the problem by deleting your Google cookie and revisiting Google. For browser-specific instructions, please consult your browser's online support centre.

    We apologise for the inconvenience and hope we'll see you again on Google'

    I can't see any viruses anywhere!!
    Who said that?

  11. #11

    Michael's Avatar
    Join Date
    Dec 2005
    Location
    Birmingham
    Posts
    8,941
    Thank Post
    232
    Thanked 1,510 Times in 1,206 Posts
    Rep Power
    328
    Who said that?
    I believe that's a Google message if Google believe too many requests are coming from the same IP.

    @sippo - If for example you are using a class C network - 192.168.x.x it would be a very bad idea to set your servers with more commonly used IPs, (such as 192.168.1.1) as you're pretty much guaranteed any access point or router will by default use the first available address.

    The fact it happens every three weeks; it would appear to be something someone is switching on. Unless you happen to have workstations not used for three weeks at a time? Possible but unlikely. I would say it is a router, access point or a machine someone is bringing into school.

  12. #12

    Join Date
    Jan 2006
    Location
    Surburbia
    Posts
    2,178
    Thank Post
    74
    Thanked 307 Times in 243 Posts
    Rep Power
    114
    IP address conflicts create TCPIP 4199 events in the event log and those contain the MAC address of the offending device (you can lookup the first few octets in the OUI to find the manufacturer).

    May or may not help you find the device, but this is *the* place to start.

  13. #13

    Join Date
    May 2009
    Location
    Sheffield
    Posts
    34
    Thank Post
    0
    Thanked 6 Times in 6 Posts
    Rep Power
    14
    Once you have the MAC address then if you've got managed switches just ask them which port it is on and trace it that way. There's a few ways to get the MAC, either check the event log as it in the post above or do an arping - if you are using Windows a program called Hardping will do it although I think it's only a 30 day trial for free, if you're using *nix it will usually be installed by default. There's probably an arping binary about somewhere for Win.

  14. #14

    Join Date
    Jan 2006
    Location
    Surburbia
    Posts
    2,178
    Thank Post
    74
    Thanked 307 Times in 243 Posts
    Rep Power
    114
    Event log is easier, but eek! Do people really manage to sell these things? If you want a free util there's the brilliant "arpscan" attached to a post in the download forum

    [Wrote that something like 8-9 years ago - update it every year or so with new vendor assignments]

  15. #15

    Join Date
    May 2009
    Location
    Sheffield
    Posts
    34
    Thank Post
    0
    Thanked 6 Times in 6 Posts
    Rep Power
    14
    Madness ain't it It's simple to write, or alternatively just use Linux...... I couldn't use Windows in my job, I'd go mental! (and be firing cygwin up every few minutes).

SHARE:
+ Post New Thread
Page 1 of 2 12 LastLast

Similar Threads

  1. Conflict: Denied Ops
    By FatBoy in forum Gaming
    Replies: 5
    Last Post: 20th February 2008, 01:58 PM
  2. IP Conflict
    By Grommit in forum Windows
    Replies: 34
    Last Post: 4th November 2007, 10:26 AM
  3. SuccessMaker Application Conflict
    By Midget in forum Educational Software
    Replies: 11
    Last Post: 4th January 2007, 08:22 PM
  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
  •