Accessing a remote subnet through a VPN and a Point to Point

Posted on 2009-03-30
Last Modified: 2012-05-06
I am trying to get one subnet to reach another subnet through a VPN and Point to Point.  Is this possible?

Subnet A 10.71.x.x--->CiscoRouter--->PointToPoint--->CiscoRouter---->LAN Switch/SubnetB 10.70.x.x-->CiscoASA---->VPNTunnel----CiscoASA---->Subnet C 10.72.x.x

I cannot ping or see anything from Subnet A to C and the reverse.

Subnet A has a Point to Point to the main site Subnet B.
Subnet B the main site has a cisco ASA VPN Tunnel to Subnet C which has the same ASA on its side.
Can Subnet A and C be made to see eachother?  If so how?

What do I need to do in the ASAs to allow these remote traffic through?  

Note the point to point router in the main site subnet B, goes into a LAN switch.  The router does not go directly into the ASA.  If that makes a difference.

Thanks for the help.
Question by:skilzygw

Accepted Solution

biscuit3 earned 500 total points
ID: 24023378
you have to tell the ASA at Subnet A and Subnet C there is another IP Subnet at each location.

Subnet A
access-list 100 permit ip 10.71.x.x 10.70.x.x
access-list 100 permit ip 10.71.x.x 10.72.x.x

Featured Post

PRTG Network Monitor: Intuitive Network Monitoring

Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

I've written this article to illustrate how we can implement a Dynamic Multipoint VPN (DMVPN) with both hub and spokes having a dynamically assigned non-broadcast multiple-access (NBMA) network IP (public IP). Here is the basic setup of DMVPN Pha…
Shadow IT is coming out of the shadows as more businesses are choosing cloud-based applications. It is now a multi-cloud world for most organizations. Simultaneously, most businesses have yet to consolidate with one cloud provider or define an offic…
After creating this article (, 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…
Windows 10 is mostly good. However the one thing that annoys me is how many clicks you have to do to dial a VPN connection. You have to go to settings from the start menu, (2 clicks), Network and Internet (1 click), Click VPN (another click) then fi…

776 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