I have a problem with Windows Server 2012, the DHCP distribute the wrong IP address(it distribute the IP address that i already reverse it for the printers ).

Hi

 Did you already create leases for this printers group.(mac leasese),please check it first.,

Also you could configure DHCP policy based assignment for this devices&groups;

Check this article also;

https://technet.microsoft.com/en-us/library/hh831538.aspx

• Proposed as answer by Leo HanMicrosoft contingent staff, Moderator 4 hours 33 minutes ago

thank you for quick response , actually ,i found some one add a router in my network .

so , how can i block any IP or MAC Address through Windows Server 2012.

Hi,

If you have already identified the rogue DHCP server than remove it from the network or let them reconfigure it the way it can't distribute IP addresses within your dhcp ranges. For more information about preventing such scenarios this article is a good start. http://social.technet.microsoft.com/wiki/contents/articles/25660.how-to-prevent-rogue-dhcp-servers-on-your-network.aspx

regards

Jan

Hi

 you can configure mac adress filtering;

check this Distribute DHCP Leases Based on MAC Address

https://technet.microsoft.com/en-us/library/dd759190.aspx

Hi Ammar,

I suppose we should disable the router from offering IP addresses.

To block any mac addresses, we could follow the guide provided by Burak.

Best Regards,

Leo