Private to Private NAT over VPN

Posted on 2008-10-10
Medium Priority
Last Modified: 2012-05-05
I have a vendor requesting to form a VPN where all traffic from me over the VPN NATs to a single private address.  How do I have a NAT statement to map all inside addresses to a single private network address only over the VPN and for the VPN local network will I use the NATed address or still the local network address.  I have a 192.168 network and they are wanting me to NAT to 10.129 address for use of the VPN.   So they are wanting all network activity to appear to come from a single 10.129 address.
Question by:dublincityschools
  • 2
  • 2
LVL 79

Accepted Solution

lrmoore earned 1000 total points
ID: 22696078
Actually, it's pretty easy.
create a conditional nat acl, ie.
 access-list conditional_nat permit ip 192.168.x.x <their network>

apply conditional_nat
 global (outside) 12 10.129.x.x
 nat (inside) 12 access-list conditional_nat

Now, use the natted IP in the crypto match acl
 access-list outside_cryptomap_12 pemit ip host 10.129.x.x <their network>

Apply this crypto map acl to the crypto map peer.

Author Comment

ID: 22706375
I figured that out this weekend but I am glad to get confirmation from someone with more knowledge.  We send all traffic to them as 10.129.~.29 but they also want all traffic sent back to us as 10.129.~.30.  Will I have to do any configuration on my end for this or just expand the network subnet originally entered in the access-list?

They also want to set it up where every printer they print to is static NAT to a 10.129 address.  I know I will have to put the static nat entry in and also expand the access-list subnet.  Is there anything else?
LVL 79

Expert Comment

ID: 22708712
Check out this guide
They should nat their end, but if they wont, You might have to do something like
nat (outside) 10 <their subnet>
 global (inside) 10 10.129.x.30


Author Comment

ID: 22711377
That is the link I found this weekend that helped me.  Thank you for your help.

Featured Post

Free Tool: Site Down Detector

Helpful to verify reports of your own downtime, or to double check a downed website you are trying to access.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

I found an issue or “bug” in the SonicOS platform (the firmware controlling SonicWALL security appliances) that has to do with renaming Default Service Objects, which then causes a portion of the system to become uncontrollable and unstable. BACK…
Will you be ready when the clock on GDPR compliance runs out? Is GDPR even something you need to worry about? Find out more about the upcoming regulation changes and download our comprehensive GDPR checklist today !
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
When cloud platforms entered the scene, users and companies jumped on board to take advantage of the many benefits, like the ability to work and connect with company information from various locations. What many didn't foresee was the increased risk…

621 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question