DHCP Spoofing Cisco Router

[smartnet]

Hi All, I have ask a lot experts how to make a "DHCP Spoofing on a Cisco router". Speetouch can do that, but nobody does now how to make this on an Cisco Router. Goal must be "Send public ip-adres to Cisco Firewall". I hope somebody have complete this, and can post the configuration. I use a PPPoA ISP line.

Thanks,

[#2]

I haven't seen configuration on Cisco Routers for DHCP spoofing. But they can be configured to prevent DHCP spoofing in a network . Check the URL http://www.cisco.com/en/US/docs/ios/12_2t/12_2t15/feature/guide/ftdsiaa.html for more ifnormation.