DNS leak test showing USA cloudflare addresses instead of local NextDNS?
Hi there, I have been using the service for about a week now and have been enjoying the local fast queries and speeds. When I first got my service up and running I had 2 local dns servers powered by nextdns. Now when I am testing for dns leaks I am seeing entries for Cloudflare addresses back to USA - 172.70.37.108
Being in Aus this creates a noticable difference going from <10ms to ~330ms ping response times. Is this a cause of a setting ticked under the performance section in the settings? Again just seeking some clarity about what is causing this. Thanks.
Edit: I have just performed another leak test, no neither NextDNS servers are showing and am getting multiple Cloudflare addresses. I run a PiHole setup and force all traffic through it using the 2x servers provided under my https://my.nextdns.io/ page.
119 replies
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And for https://cmdns.dev.dns-oarc.net, I get a C result (while getting an A without NextDNS enabled).
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On https://browserleaks.com/dns I sometimes also get Google DNS results in addition to the NextDNS one. The example below was with the NextDNS profile running, so it's not just the app I'm seeing this with. Reloading that page 20-30 times will usually trigger it.
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And I can now also see it on https://www.dnsleaktest.com.
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https://ipx.ac/run now also shows those DNS leaks.
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example nextdns leaking to another resolver did not happen with quad9
nextdns leaking to cloudflare https://1drv.ms/v/s!Ao_cI16Qge_xa3J2wGVU4q-EEj4
quad9 no leaking https://1drv.ms/v/s!Ao_cI16Qge_xbLJM4djQP7oyM20
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@Nextdns is there anyone from nextdns looking into this DNs leak issue ? I have similar issues posted in another thread-
https://help.nextdns.io/t/m1h16c3/block-public-dns-like-google-and-other-malware-dns
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I have a theory and I would like to ask everyone what are the main browsers you guys use, I for example use Brave and I noticed that several who are having DNS Leak are doing it for Brave and by the looks of it, Brave, well, it contacts Cloudflare and Google servers from time to time, which may be the cause of the mega leak we're noticing:
If you’re on Linux curl the static1 link. curl --head static1.brave.com, if you want proof of even further telemetry: it lists cloudfare and google, two unnecessary domains, but most importantly telemetry domains.
Source: https://www.reddit.com/r/privacytoolsIO/comments/nvz9tl/brave_is_not_private/
I'm asking this, because I decided to change to another DNS provider (ControlD) and the leak hasn't stopped, like, it's gone down, there are no more dozens of servers, at most, only three (All from Cloudflare), but it still goes on, so I decided it would be good to ask which browser you are using and if the leak problem seems to be worse on some specifics than others, as those who seem to use Firefox aren't getting the same level of leaks as those who auditioned for Brave. So, I think it would be good to do this comparison, as it might not be a NextDNS problem, but a browser issue (Since at least for me, I'm testing another Provider and the problem hasn't stopped, but the leak has decreased a lot).
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Myth0ne said:
So for your paid service is it just the logging and blocking functionalities for infinite queries that are enabled?Yeah. The paid plan gives you unlimited full-service queries. For $2/mo, it's one of the better deals on the internet.
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Same here, I tried using all DNS providers known to me from BlahDNS to Google and in all usual configurations. Tested on multiple websites.
None of them leaked except for NextDNS. Another interesting point to note is that after testing with other DNS providers when I switch to NextDNS, some of servers from the previous tests show up on https://browserleaks.com/dns , such as WoodyNet of Quad9 or Cloudfare, Ashburn (which is very frequent in the results) . However, this is not true for other providers, when switched to say BlahDNS I only see the servers that I saw previous month.
I'll be adding pictures once I redo the tests later since I forgot to take some screenshots.
However, something is wrong NextDNS's side for sure. It maybe a bug given how frequent it is with other users as well.
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Here are my DNS leaks -
[United States of America, AS701 MCI Communications Services Inc. d/b/a Verizon Business]
You use 20 DNS servers:
2a00:1450:400c:c08::110
[Belgium, AS15169 Google LLC]
2a00:1450:400c:c0d::101
[Belgium, AS15169 Google LLC]
2a0b:4342:1a32:f:5054:ff:fe48:d17f
[United States of America, AS35487 Misaka Network Inc.]
2a00:1450:400c:c00::104
[Belgium, AS15169 Google LLC]
2a00:1450:400c:c0d::107
[Belgium, AS15169 Google LLC]
2a00:1450:400c:c08::105
[Belgium, AS15169 Google LLC]
2a00:1450:400c:c00::107
[Belgium, AS15169 Google LLC]
2a00:1450:400c:c01::108
[Belgium, AS15169 Google LLC]
2a00:1450:400c:c1b::105
[Belgium, AS15169 Google LLC]
2a00:1450:400c:c00::105
[Belgium, AS15169 Google LLC]
2a00:1450:400c:c0a::107
[Belgium, AS15169 Google LLC]
2a00:1450:400c:c1b::10c
[Belgium, AS15169 Google LLC]
2a00:1450:400c:c0a::109
[Belgium, AS15169 Google LLC]
74.125.47.11
[Belgium, AS15169 Google LLC]
74.125.47.130
[Belgium, AS15169 Google LLC]
74.125.47.155
[Belgium, AS15169 Google LLC]
74.125.73.70
[Belgium, AS15169 Google LLC]
74.125.73.77
[Belgium, AS15169 Google LLC]
74.125.73.82
[Belgium, AS15169 Google LLC]
199.119.65.94
[United States of America, AS57695 Misaka Network Inc.]
Content aside
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