Problems with VPN

Posted on 2017-04-18
Last Modified: 2017-04-18

I have set up an L2TP VPN connection for my office. This is working flawlessly from all networks I've tried from except for my home network. The only reason I can think of is that the public IP of my home and office network are in the same subnet.


Home network

Office network

I know that equal internal nets can cause problems but I have not heard about public IP interference like this.

Do you have any ideas?
Question by:Fredrik Lövgren
  • 2
LVL 12

Expert Comment

by:Natty Greg
Please post your home and office configuration

Author Comment

by:Fredrik Lövgren
This is not peer2peer and the configuration is working fine from other networks so I'm not sure what configurations you are refering to.
LVL 29

Accepted Solution

Predrag Jovic earned 500 total points
Having public IP addresses for home anf office in the same subnet is problem!
If IP addresses are really in the same subnet devices will try to ARP to resolve MAC address, but you need to route packets.
Having the IP addresses in the office and home in the same IP address range sounds impossible. :)

Author Closing Comment

by:Fredrik Lövgren
Thank you, I guess I'm out of luck then since my ISP won't assign me static IP or refresh DHCP.

Featured Post

Now Available: Firebox Cloud for AWS and FireboxV

Firebox Cloud brings the protection of WatchGuard’s leading Firebox UTM appliances to public cloud environments. It enables organizations to extend their security perimeter to protect business-critical assets in Amazon Web Services (AWS).

Join & Write a Comment

Suggested Solutions

Meet the world's only “Transparent Cloud™” from Superb Internet Corporation. Now, you can experience firsthand a cloud platform that consistently outperforms Amazon Web Services (AWS), IBM’s Softlayer, and Microsoft’s Azure when it comes to CPU and …
If you're not part of the solution, you're part of the problem.   Tips on how to secure IoT devices, even the dumbest ones, so they can't be used as part of a DDoS botnet.  Use PRTG Network Monitor as one of the building blocks, to detect unusual…
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…

713 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