Issue with Pi-hole, Unbound, and VPN: Ad-blocking not working with certain client settings

Help
1

I've set up List item a server using Pi-hole and Unbound for ad-blocking, combined with a VPN server (all running on AWS in Japan). I'm experiencing some unusual behavior with different client configurations:

  1. When "Allowed IPs" is set to "10.218.170.1/32" on the client:
  • VPN works
  • Region shows as Canada (despite the server being in Japan)
  • Ad-blocking seems to function correctly
  1. When "Allowed IPs" is changed to "0.0.0.0/0" on the client:
  • VPN works
  • Region correctly shows as Japan
  • Ad-blocking stops working

I'm confused about why changing the "Allowed IPs" setting affects both the perceived region and the ad-blocking functionality.

Questions:

  1. Why does the region appear as Canada with the more restrictive IP setting?
  2. Why does ad-blocking stop working when I use "0.0.0.0/0" as the Allowed IPs?
  3. How can I configure the client to use the correct region (Japan) while ensuring that ad-blocking remains functional?

Any insights or suggestions on how to troubleshoot this issue would be greatly appreciated. Thank you!

2

This is related to the VPN software you are using, rather than Pi-hole.

You should consult forums specialising in your chosen VPN software.

3

Sorry, I will ask the VPN forum.