Wireguard VPN traffic blocked by default

[zod076]

Hi, using rdns 0.5.5n on Android 14, with Wireguard set as the proxy, everything seems to be blocked. Nothing gets out. Turning off and deleting the Wireguard profile allows me to browse the web again.

The same Wireguard config when used with the official Wireguard app, everything works. What could be the issue here ?

I have rdns in DNS+Firewall mode(recommended)

[onetimecontributor]

as a matter of fact, Android 14 + rdns + wireguard (proton) works just fine for me.
so it's definitely not a generic issue.
I have set rdns as "always on" in Android's system settings, and my wireguard's profile is in both "lockdown" and "always on"

[zod076]

Anything else I could do to narrow down the issue ?

Like some other settings I missed ?

[zod076]

Ok, got a bit close. It looks like the issue is related to IPv6. My VPN has working IPv6 yet Rethink doesn't use it and after timing out it falls back to IPv4.

I tested this with one of those whatsmyipv6 test sites and only the VPN IPv4 address appears on the test page.

Is Rethink blocking IPv6 when Wireguard proxy is in use ?

[onetimecontributor]

Is Rethink blocking IPv6 when Wireguard proxy is in use ?

sorry, can't test immediately, as I don't have relevant infra atm, though will have it soon

disclaimer: I'm just a regular rdns user

[zod076]

No worries..

But that seems to be what I'm seeing as whatsmyip test sites only shows the VPN's IPv4 address.

[onetimecontributor]

just in case, have you set Configure - Network - Choose IP version to Auto ?

[zod076]

just in case, have you set Configure - Network - Choose IP version to Auto ?

Yep, I think the VPN works but with IPv4. Meaning if the Wireguard Endpoint is IPv4 but the tunnel Addresses and DNS are IPv6 then rdns seems to block it somehow.