Comments on: How to Build a Fast VPN Server with WireGuard on Debian 13

By: hamsterchat

hamsterchat — Tue, 02 Jun 2026 23:38:28 +0000

In reply to Ravi Saive. Thank you for your support. The error disappeared when I installed iptables.

By: Ravi Saive

Ravi Saive — Mon, 01 Jun 2026 04:51:43 +0000

In reply to hamsterchat. @Ardiya, Yes, the guide should work on Debian 12 as well, since WireGuard support is included in the Debian 12 kernel and the setup steps are largely identical. The error you're seeing usually indicates a problem in the /etc/wireguard/wg0.conf configuration file rather than a compatibility issue. I'd recommend checking the output of:

sudo systemctl status wg-quick@wg0
sudo journalctl -xeu wg-quick@wg0.service

Some common causes include: syntax errors in wg0.conf, missing or incorrect private/public keys, invalid IP address or CIDR notation, incorrect file permissions or a port conflict with another service. If you can share the relevant output from the commands above (excluding any private keys), I'd be happy to help troubleshoot further.

By: hamsterchat

hamsterchat — Sat, 30 May 2026 17:50:36 +0000

Thanks for the tutorial. Is this guide valid for Debian 12 as well? I'm getting an error when I try to start the WireGuard server using:

sudo systemctl start wg-quick@wg0

It returns:

Job for wg-quick@wg0.service failed because the control process exited with error code.
See "systemctl status wg-quick@wg0.service" and "journalctl -xeu wg-quick@wg0.service" for details.

Has anyone encountered this issue on Debian 12, or is there an additional step required?

By: Michael

Michael — Tue, 18 Apr 2017 08:50:28 +0000

In reply to Vmh.

@vmh use baserange/112 instead of baserange/64 for your config.

By: Vmh

Vmh — Tue, 18 Apr 2017 01:23:16 +0000

In reply to Michael.

@Michael – you are actually correct. Once I sorted out what was going on: I was looking at the wrong thing – that was actually a loopback IP address. I was assigned a block of IP addresses (from ::f000-f00f).

These are verifiable. The problem is that in any of the articles I have read on configuring IPv6 VPN’s, it requires (or strongly recommends) a /64 block. It appears that Digital Ocean is assigning me a /112 block of which I need one address for the server itself.

This won’t work from what I understand. My dilemma is that I cannot find anything that addresses this on Digital Ocean. It seems extreme to open a ticket for this – I am a little astonished that no one seems to have the same problem … almost like I am missing something very obvious.