Weird result while testing DNS-Over-TLS configuration

[NoobestNoob]

Used this method to configure DNS-Over-TLS /etc/config/dhcp looks like this.

However, while restarting dnsmasq I get this.

# /etc/init.d/dnsmasq restart
udhcpc: started, v1.28.4
udhcpc: sending discover
udhcpc: no lease, failing

I failed to undersatnd above error but still I dared and tested DNS

1.1.1.1/help and dnsleaktest result looks good I guess

Now the weird part,

I also tested DNS on https://cmdns.dev.dns-oarc.net/

Firefox result : Imgur

Chrome result : Imgur

Firefox and Chrome with tutorial result : Imgur

OpenWRT 18.06 Adblock 3.6-5.2

I tested these multiple times to be sure getting the same result.

Call me silly but something is weird.

[vgaetera]

cat /etc/resolv.conf

And what is 192.168.31.1?

[NoobestNoob]

# cat /etc/resolv.conf
# Interface wan
nameserver 127.0.0.1

what is 192.168.31.1 ?

My routers IP

[vgaetera]

@NoobestNoob

nameserver 127.0.0.1

It doesn't work well with Adblock, you should use split DNS mode and restart Stubby:
https://openwrt.org/docs/guide-user/base-system/dhcp_configuration#upstream_dns_provider

/etc/init.d/stubby restart

@NoobestNoob

My routers IP

If your router and DHCP server is the same device, then you don't need to push this IP as the DHCP option.

Note that some browsers have pre-configured DNS over HTTPS, or pre-installed Tor plugins, or the like.
When those features are not disabled specifically, the test results are unreliable.

Also your DNS leak test shows 2 different countries which may be an incorrect GeoIP match or not.
So, it may affect the test result because the replies from those servers may be different.

[NoobestNoob]

@vgaetera

don't need to push this IP as the DHCP option.

Can you tell me from where do I remove and replace it with what?

Also I used to have pihole so I've added

config domain

shall I remove it?

I've read people are using with adblock without any issues

[vgaetera]

@NoobestNoob

I've read people are using with adblock without any issues

It works fine in split DNS mode.
Otherwise Adblock fails to download the blocklists and/or Stubby fails to start upon system startup.
There's a race condition between these services.

@NoobestNoob

Also I used to have pihole

So, you don't have it anymore?
What role does it perform if you still have it?

@NoobestNoob

Can you tell me from where do I remove and replace it with what?

uci -q delete dhcp.lan.dhcp_option
uci commit dhcp
service dnsmasq restart

And reconnect the LAN clients to apply the changes.

[NoobestNoob]

@vgaetera

So, you don't have it anymore?
What role does it perform if you still have it?

Currently nothing. I'm still figuring out something new to do with rpi.