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New Member

VPN between 2 cisco 1841 behind NAT Device

Hello,

i have to configure 2 Routers 1841 for an IPSEC VPN. My Problem is, that on the Path between the Router is a NAT Device.

On the HUB Router i can see the NAT IP Address but the Router expects the Source IP from the Spoke.

Can anybody tell me what is the Problem?

Thanks in advance

Lorenz

4 REPLIES
Silver

Re: VPN between 2 cisco 1841 behind NAT Device

Can you create a static NAT on your NAT device for your spoke VPN router and then use the NATed address on your peer IPSEC/ISAKMP statements on your HUB router.

Rgds

Paddy

New Member

Re: VPN between 2 cisco 1841 behind NAT Device

the NAT Device is an ISP Device this mean that i haven't any access on this device.

Regards

Lorenz

Silver

Re: VPN between 2 cisco 1841 behind NAT Device

Is it a static NAT tho'. Can you ping your peer router by using the NAT address you are seeing when the packets hit you?

New Member

Re: VPN between 2 cisco 1841 behind NAT Device

It is not possible, because the router setup a tunnel

if traffic go out. The NAT IP is always the same one, but i do not know,if it remains so.

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