this post was submitted on 30 Oct 2023
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[WireGuard] Do I have to use my own DNS on a VPS in order to avoid DNS-leaks? (lemmy.world)
submitted 1 year ago* (last edited 1 year ago) by salvador@lemmy.world to c/programming@programming.dev
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I connect to a WireGuard installed on my VPS. Then I go to a random VPN service marketing page on which I'll discover that my DNS leaks. And which is correct because I've specified DNS = 1.1.1.1 in [Interface] for all the Peers.

In order to avoid DNS leakadge, do I have to a) run DNS server on the a VPS -- along with WireGuard, and b) use this one and only it, instead of 1.1.1.1?

But if so, how will this possibly work?

[Peer]
PublicKey = [....;....]
PresharedKey = [......]
Endpoint = wg.my_domain123.com:51820

In order to resolve Endpoint of my VPS to begin with, other DNS server will have to be used -- by IP. But there'll be none because I'll use a DNS on my VPS instead of 1.1.1.1. In other words, it'll be a circular dependency.

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[โ€“] salvador@lemmy.world -5 points 1 year ago* (last edited 1 year ago) (1 children)

You've assumed that my VPS has a DNS server installed on it. Why?

[โ€“] towerful@programming.dev 2 points 1 year ago* (last edited 1 year ago)

Use the IP address of your vps instead of a domain name for the wireguard config.

Edit:
Just to make this absolutely clear and remove all doubt.
If wireguard is trying to connect using a domain name, the domain name will need to be resolved, which will likely require initial DNS queries to establish the IP address behind the domain name.

If you configure wireguard to connect directly to the IP address of the VPS, there is no need for a DNS lookup.

So no, I'm not assuming your VPS is running a DNS.
Wind your neck in before you embarrass yourself.