[c-nsp] Tunnel from a Cisco behind NAT

Kris Amy Kris.Amy at EIP.net.au
Sun Jan 4 22:37:52 EST 2009


Hi Folks,

I got this working with DMVPN.

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Kind Regards,
Kris Amy
Enterprise IP
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Email:    kris.amy at eip.net.au


-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Jorge Evangelista
Sent: Monday, 5 January 2009 10:23 AM
To: cisco_nsp
Subject: Re: [c-nsp] Tunnel from a Cisco behind NAT

You could forward PPTP protocol to router Cisco. What kind of router Cisco
do you have? What is IOS version?



On Sun, Jan 4, 2009 at 7:12 PM, Brett Looney <brett at looney.id.au> wrote:

> > I have a Cisco device that is behind a NAT router already and I am
> > wishing to make a tunnel to another router which is live.
>
> I have done this with IPSEC. If the NAT is not static (i.e. you can't
> initiate a session to the router behind the NAT) then you can only bring up
> the tunnel from that router but it does work...
>
> The only caveat is that some NAT devices don't NAT IPSEC correctly but I
> haven't found any like that for a few years now. Plus, you can enable NAT-T
> and that helps in most cases.
>
> B.
>
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