128 bit PPTP Encryption and NAT
Pete Davis
pete at ETHER.NET
Tue Aug 1 16:46:45 EDT 2000
You can use PPTP sessions from behind a NAT (PAT) device as long as it supports
GRE PAT, which most devices do not. Many small devices do have this support
and Linux does with a special patch from John Hardin. You will only be able
to use 1 PPTP session at a time from behind this NAT device to a specific
central site Concentrator at a time.
Regards,
pete
On Mon, Jul 31, 2000 at 05:59:27PM -0700, Michael Medwid wrote:
> Should there be any incompatibility between 128 bit PPTP encryption
> and users behind a NATted environment? My Altiga (Cisco 3030) seems to kick
> off the tunnels if they were originated from a NATted environment. Cisco
> TAC didn't have too much to say on the whole thing other than "uh yeah that
> won't work." Thanks for any insight.
>
> -Michael
>
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---
Pete Davis - Product Manager <psd at cisco.com> (508) 541-7300 x6154
Cisco Systems, Inc. - 124 Grove Street Suite 205 Franklin, MA 02038
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