private dns setting of android
Probably. If that setting is enabled, Android (including Graphene) defaults to 8.8.8.8 if the higher-priority DNS servers (manual or received from DHCP) don't support DNS-over-TLS or DNS-over-HTTPS.
this post was submitted on 23 Oct 2025
23 points (100.0% liked)
Selfhosted
61674 readers
138 users here now
A place to share alternatives to popular online services that can be self-hosted without giving up privacy or locking you into a service you don't control.
Rules:
-
Be civil.
-
No spam.
-
Posts are to be related to self-hosting.
-
Don't duplicate the full text of your blog or readme if you're providing a link.
-
Submission headline should match the article title.
-
No trolling.
-
Promotion posts require active participation, with an account that is at least 30 days old. F/LOSS without a paywall has exceptions, with requirements. See the rules link for details. Tags [CBH] or [AIP] are required, see the links in Rule 8 for details.
-
AI-related discussions and AI-involved promotional posts have additional requirements for tagging, as noted in Rule 7 and the AI & Promotional Post Expanded Rules post, and find example disclosures here.
Resources:
- selfh.st Newsletter and index of selfhosted software and apps
- awesome-selfhosted software
- awesome-sysadmin resources
- Self-Hosted Podcast from Jupiter Broadcasting
Any issues on the community? Report it using the report flag.
Questions? DM the mods!
founded 3 years ago
MODERATORS
I disabled private dns and it seemed to work yesterday, but today i can not connect to my services again. Any other ideas on how to pin down the issue?
Install Termux, then use either the dig or nslookup command to query the DNS name, and check which DNS server is queried. If it's the private server's address, you might be having connectivity issues. If it's 100.100.100.100, the resolver is still trying to query Tailscale's MagicDNS.
doesn't termux always default to 1.1.1.1?
edit: https://old.reddit.com/r/pihole/comments/iivdgq/psa_termux_on_android_does_not_use_system_dns/ maybe its 8.8.8.8, don't have my phone so can't check rn
Yes no matter if it works or not, it always returns the tailscale ip I configured with cloudflare, saying it is using 8.8.8.8 as the dns server.
Right... my mistake, I guess I had SSH config entries in Termux and never questioned whether SSH was using those or DNS.
Still, try to find some way to check which server is being queried. It might reveal connectivity problems with the local DNS server.
I kinda had a similar problem. Never found the root cause, but what did the trick for me was to put an OpenWRT Router between the default ISP router and my home network.
As I said, I never figured out, why Android did not respect the DHCP settings of the default router, but here we are. Maybe it was some DNS shenanigans by the ISP's config, maybe it was a wrong DNS/DHCP configs from my side, maybe it was IPv6 shenanigans. Those are the culprits I would investigate from your side.
I configured Adguard now as the ipv6 dns server in the fritzbox as well. For now it seems to work, under settings > network & internet > network details for my home network it shows the right dns addresses now. Thanks!