Transfer WAN IP address to ethernet device

[federico_tv]

I'll try to explain it better :

I'm using  a 877 router to connect to DSL ISP

Dialer interface obtains a static ip address after ISP authentication

Then all ports and protocols are forwarded to a LAN firewall to make this last figure as it was a public interface, but it's not really so, as traffic is anyway natted by 877

Is it possible in some way to assign the public IP address to the firewall NIC and use 877 to be a transparent dialer modem (unnumbered ethernet or something like) ??

Thank you

[Richard Bradfield]

I dont think so, as the ISP negotiates  the IP address from the ppp credentials.

[federico_tv]

I was supposing so.....

Yes, cisco would negotiate IP addres with ISP (anyway it is a static one) , once achieved, I thougth there was some mechanisn to bridge it transparently to firewall ethernet......