MikroTik

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

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

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

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

feature request!... something like this:

http://ipwatchd.sourceforge.net/

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

feature request!... something like this:

http://ipwatchd.sourceforge.net/

Something like arpwatch would be more useful, IMO.

feature request!... something like this:

http://ipwatchd.sourceforge.net/

Something like arpwatch would be more useful, IMO.

Yes. Arpwatch is better.

Tool > IP Scan
Search double entry in Address column:


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


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.