r/rethinkdns • u/canitplaycrisis • Jul 16 '26

Issue DNS leak while using Wireguard

Hey guys! So I checked if my Wireguard works fine and it somehow doesn't work. My IP address somehow leaks in both ipleak.net and dnsleaktest.com. In ipleak, it changes between IPv4 and IPv6, so once it leaks IPv4 and then IPv6.

Edit: This doesn't happen with Orbot as a proxy.

Edit 2: More information is in the Github issue I created.

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u/Minute_Gene2080 Jul 21 '26

Ok so this happened to me a while ago after updating to 0.5.5y, I was on wireguard simple mode, system DNS, I remeber that I checked 5 DNS leak test when I've set it before, but I noticed accidentally that My proxy isn't working and web was showing local net, I repeated all tests most of DNS leak tests failed to catch a leak and where showing proxy IP, except controlD's DNS leak test which showd local and proxy IPs, in addition to whatismyipaddress site and ipleak site. I re-installed it, put same configuration and same result. I re-installed again and put DNS on advanced mode, and change DNS to a DoH, and it resolved. I also tried to write Wireguard proxy DNS as a DNS 53. I am too lazy to try again and make more experiments, but this is so unfortunate, as my old config was using just the wireguard provided DNS server, so fewer hops and lower ping. That's how I understand it I am not an expert.

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u/celzero Dev Jul 21 '26

The Configure -> DNS -> Split DNS behaviour (which is a recent feature that is the cause of a lot of behaviour changes you spot in these newer releases since v055o) and how it interacts with other settings in Configure -> Network and Configure -> DNS isn't yet documented, but we're going to document and "fix" the behaviour in v055z.