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karo84
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Detect Ip conflict with ROS

Wed Aug 05, 2009 1:38 pm

Hi!
How To Detect and log the mac address of the bad host, which has the same IP with MT ROS. ?
Please Help Me, It's urgent.

Thanks
Regards
Karapet
 
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mrz
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Re: Detect Ip conflict with ROS

Wed Aug 05, 2009 1:40 pm

You can connect windows machine somewhere in your network, if there is IP conflict windows will tell you :).

I don't know any methods how you can do it with RouterOS
 
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karo84
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Re: Detect Ip conflict with ROS

Wed Aug 05, 2009 1:52 pm

When using Cisco it logs duplicated Ip Address.
But I want To have some method To log the Duplicated Ip with ROS.
 
atari800xl
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Re: Detect Ip conflict with ROS

Sun Jan 03, 2010 2:48 pm

You can connect windows machine somewhere in your network, if there is IP conflict windows will tell you :).

I don't know any methods how you can do it with RouterOS
Hello,will Windows tells,which IP adress is in conflict ?
thank you for answer
 
guille4
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Re: Detect Ip conflict with ROS

Sun Jan 03, 2010 4:36 pm

feature request!... something like this:

http://ipwatchd.sourceforge.net/

:D
 
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butche
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Re: Detect Ip conflict with ROS

Sun Jan 03, 2010 9:46 pm

Hi!
How To Detect and log the mac address of the bad host, which has the same IP with MT ROS. ?
Please Help Me, It's urgent.
If you have a CURRENT problem, do this:
  • Pick an available IP address in the range that has a suspect/known duplicate
  • Assign the above IP address to the interface on the MT that faces that network
  • Remove or disable the IP address on the device that is SUPPOSED to have that IP
  • Do: "/ip arp remove [find]" on the Mikrotik(it is not NECESSARY, but helpful sometimes)
  • Attempt to ping the IP that is duplicated. IT WON'T MATTER IF IT RESPONDS
  • If the IP is truly duplicated, you will find the MAC address of the offending device in the ARP table (even if it did not respond to the ping)
  • Restore the IP on the device that is supposed to own that address
--
Butch Evans
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butche
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Re: Detect Ip conflict with ROS

Sun Jan 03, 2010 9:47 pm

feature request!... something like this:

http://ipwatchd.sourceforge.net/
Something like arpwatch would be more useful, IMO.
--
Butch Evans
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Mikrotik Certified Consultant
BLOG: blog.butchevans.com
http://store.wispgear.net/
 
guille4
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Re: Detect Ip conflict with ROS

Mon Jan 04, 2010 4:40 am

feature request!... something like this:

http://ipwatchd.sourceforge.net/
Something like arpwatch would be more useful, IMO.
Yes. Arpwatch is better.
 
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SiB
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Re: Detect Ip conflict with ROS

Wed Sep 12, 2018 5:24 pm

Tool > IP Scan
Search double entry in Address column:
Image

Tool > Ping
Arping give you a double MAC in seq number:
Image

You can do a testing via scripts and that way detect a conflict automatical.
My way is add a script into DHCP Server who check every new lease and alarm me via e-mail.
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