<Off Topic> redirecting a port in cisco 1604 using NAT
Dana J. Dawson
dana at INTERPRISE.COM
Fri Feb 11 13:05:41 EST 2000
Cliff Friedel wrote:
>
> Hi all. Realize that this is a little off topic, but since there are a
> fair number of cisco admins on the list I figured I would ask. I was
> wondering if there was a way to redirect a port on the BRI interface of
> a 1604, to a machine on a private network. I am running NAT for the
> outbound traffic if that is a concern. The reason I want to do this is so
> I can allow telnet traffic into a machine while still keeping the machine
> behind NAT. If you can guide me to a resource (I have looked on cisco's
> site to no avail) it would be greatly appreciated. Thanks.
>
> Cliff Friedel
>
> VPN is sponsored by SecurityFocus.COM
Try this command:
ip nat inside source static tcp 10.1.1.1 23 A.B.C.D 23
where "10.1.1.1" is the private address of the host you want to allow telnet
access to (this is a dangerous thing, by the way), and "A.B.C.D" is the
registered address being routed to your 1604. Assuming you have a version of
IOS with full NAT support, and that you have a permanently assigned IP address
from your ISP, this should do the trick. If you're getting only a dynamic
address from your ISP, then there's no syntax in IOS to do what you want to do
(at least not yet). Bummer.
HTH
Dana
--
Dana J. Dawson dana at interprise.com
Distinguished Principal Engineer CCIE #1937
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