VPN Routing

Posted on 2004-09-05
Last Modified: 2010-04-12
Hi, i'm trying to understand the whole way a VPN works and make it fit a solution I am trying to implement.
I have a DSL Router that can act as a VPN server with a fixed IP for the internet and a fixed IP for the LAN side ( The Lan connection is then plugged into a Linux box with 2 network cards. One of the network cards has an address on whilst the other has an address of which in turn is plugged into our switched network running on the same range. If I activate the VPN - when a client connects to it - what IP address would I use for the setup, as the VPN configs ask for the 'internal network'. I want my external user to be able to see a server or resources on the range. Would it translate through or does it not work like this?

Many thanks for your time and help.
Question by:nesbituk
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
1 Comment

Accepted Solution

blin2000 earned 125 total points
ID: 11998475
This is routing issue. has an article regarding the ISA routing, but it is the same issue.

Configure Routing to another subnet in ISA for VPN client
Symptom: you create VPN in ISA server and the VPN clients use different IP range from the LAN. For example, the LAN IPs are 10.X.X.X and the VPN client IPs are 192.168.1.X.

Resolution: you need to add routing table entries  pointing to the internal interface of the ISA server for the off subnet network ID. You can add these manually, or use a routing protocol such as RIP or OSPF.

Featured Post

On Demand Webinar - Networking for the Cloud Era

This webinar discusses:
-Common barriers companies experience when moving to the cloud
-How SD-WAN changes the way we look at networks
-Best practices customers should employ moving forward with cloud migration
-What happens behind the scenes of SteelConnect’s one-click button

Question has a verified solution.

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

I've had to do a bit of research to setup my VPN connection so that Clients can access Windows Server 2008 network shares.  I have a Cisco ASA 5510 firewall.  I found an article which was extremely useful: It had a solution if you use ASDM to config…
Juniper VPN devices are a popular alternative to using Cisco products. Last year I needed to set up an international site-to-site VPN over the Internet, but the client had high security requirements -- FIPS 140. What and Why of FIPS 140 Federa…
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…
Suggested Courses

623 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