VPN tunnels problem

Posted on 2008-10-20
Last Modified: 2013-12-14
I'm trying to connect 2 fortigate units thru a VPN tunnel and one is located after a Linksys WAG54GS which provides the internet connection.
The configuration of the linksys is the following:
NAT mode is enabled
RIP is disabled
DMZ is enabled fo the IP address of the Fortigate.

internet is working on the internal LAN but the VPN won't go up...
Do you have any idea on how to configure the linksys?




Question by:jeebee75
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
  • 3
  • 2

Expert Comment

ID: 22756713
no that wont work you have to make the Linksys WAG54GS as half bridge mode  so that fortigate will get the public ip.

 If the WAG54GS supports multiple public ips then you have to assign another public ip and map that to the internal ip of the fortigate. Set the vpn on that public ips

Expert Comment

ID: 22756807
looks like your linksys  router don't support multiple public ips so try the half bridge mode .  you will loose the ability to use the wireless. In fact your linkys will work as just a modem to your   fortigate but then very easy to manage.

Author Comment

ID: 22756855
how do you set the half bridge mode?

Accepted Solution

din101 earned 500 total points
ID: 22756958
It's call bridge mode in your router user guide page 9 (have a look at the end of the page 9)

you can get the user guide here 

Author Comment

ID: 22757042
the problem is that my FG is not able to create PPPOA connection (only PPPOE).
And so it won't be possible for me to work wihout NAT and DMZ.
It used to work with the DMZ and I don't know why it's not working anymore...


Featured Post

Create the perfect environment for any meeting

You might have a modern environment with all sorts of high-tech equipment, but what makes it worthwhile is how you seamlessly bring together the presentation with audio, video and lighting. The ATEN Control System provides integrated control and system automation.

Question has a verified solution.

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

OpenVPN is a great open source VPN server that is capable of providing quick and easy VPN access to your network on the cheap.  By default the software is configured to allow open access to your network.  But what if you want to restrict users to on…
If you use NetMotion Mobility on your PC and plan to upgrade to Windows 10, it may not work unless you take these steps.
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…

717 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