Vanadium stopped being able to resolve IP when used along with RethinkDNS

macnar

Hello, I'm using RethinkDNS and it's been a few weeks that when I open Vanadium, I get a "server IP address could not be found" error, which is solved by deactivating RethinkDNS. I wondered about a bug in Rethink, but other browsers and apps are still working fine. I tried setting a different DNS in Vanadium's parameters and disabling the secure DNS option but this failed to solve the issue. The app has is "allowed" in Rethink with no particular additional blocking option (indeed, it was working normally before suddenly showing this error). Any idea of what could cause that ?

ignoramous

rdns dev here

macnar I get a "server IP address could not be found" error, which is solved by deactivating RethinkDNS.

If you don't mind, which domains do you regularly see this for? Is there a pattern?

Also, search for the respective domain names (that don't load in Vanadium) in Configure -> DNS. From the entries that filter out, look for the ones resolved by the app in question (here, Vanadium). Then, tap on these entries and a bottomsheet with more information about the DNS query/answer should come up (the upstream resolver used, time to live, query type, list of answers etc). The footer of this bottomsheet will contain error messages, if any. The center of this bottomsheet will contain error title (send fail, client error, transport error, query error etc), if any.

If everything looks alright, filter for the same domain name in Configure -> Network and look for entries attributed to the app ("Vanadium"). See if you spot any firewall specific blocking by tapping on these entries which should, like above, bring up a bottomsheet with more details about the connection (like "DNS Bypassed", "Device Locked" etc which are settings that apply to all apps and change-able from Configure -> Firewall -> Universal firewall rules).

All firewall/domain/IP rule related blocks (of both queries and connections) appear with a red-coloured left-hand side border in both Configure -> DNS & Configure -> Network.

macnar The app has is "allowed" in Rethink with no particular additional blocking option

You can consider turning off all Configure -> Firewall -> Universal (global) firewall rules (if you have enabled any) to see if connectivity for the apps (or at leas, Vanadium) get restored.
You can also go to Configure -> Apps -> Vanadium and tap on "Allow for 15mins" to see if that gets rid of blocks (if so, a tell-tale sign that some firewall / IP / domain rule is getting in the way of you and the domain you're trying to visit in Vanadium).
Additionally, turn off any "experimental" setting in Configure -> DNS and Configure -> Network and see if it helps?

macnar

It's always when I finally ask that everything suddenly work again. Idk if there was an update or something but it just works. Thanks for your answer and also for this very useful app !