IP address passthrough

Unanswered Question
Jun 8th, 2010

Hi all. I have a customer with a 5510 ASA and they only have one public ip address. They need to terminate the annex M adsl on a 877ISR. Does anyone have a sample configuration that will allow me to pass the ip address from the 877 onto the ASA? All ideas would be greatly appreciated.

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Federico Coto F... Tue, 06/08/2010 - 07:22

Hi,

One solution is to configure a static NAT on the 871.

ip nat inside source static x.x.x.x y.y.y.y

interface e1 --> inside

ip nat inside

interface e0 --> outside

ip nat outside

So, all the traffic received on the router on public IP y.y.y.y will be sent to the private IP of the ASA x.x.x.x (for example to terminate VPNs)

Federico.

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