NAT inside VPN Tunnel

Announcements

ATTENTION Customers, All Partners and Employees: The Customer Support Portal (CSP) will be undergoing maintenance and unavailable on Saturday, November 7, 2020, from 11 am to 11 pm PST. Please read our blog for more information.

Reply
Highlighted
L3 Networker

NAT inside VPN Tunnel

I have to create a VPN Tunnel to an untrusted network (business partner).

I found out I will have to advertise all of our subnets to the parner, server nets, user nets, all of them...

I will make some firewall rules to restrict traffic but also ...

Is there a way I can setup the VPN but then NAT INSIDE the VPN so the remote side does not have to see our entire internal network address ranges, just the NAT IPs?

Highlighted
L4 Transporter

Hello,

Yes, you should be able to configure a source nat for all traffic from Trust zone to the VPN zone (i.e. zone where the tunnel terminates), with destination address pointing to your Remote LAN's subnet. This will translate all traffic traversing the tunnel to the remote peer. Make sure the remote end has a route for the "NAT'ed IP's" through the tunnel.

Although not entirely related, you can refer to this document on Configuring IPsec with overlapping networks if needed.

Thanks,

Aditi

Highlighted
L3 Networker

ok thanks,

so, it sounds like,

I do not need to bind any IP address/range to our interface (or tunnel interface), just the NAT rules will do ....

Like what you see?

Show your appreciation!

Click Like if a post is helpful to you or if you just want to show your support.

Click Accept as Solution to acknowledge that the answer to your question has been provided.

The button appears next to the replies on topics you’ve started. The member who gave the solution and all future visitors to this topic will appreciate it!

These simple actions take just seconds of your time, but go a long way in showing appreciation for community members and the Live Community as a whole!

The Live Community thanks you for your participation!