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got a domain that resolves withcloudflare but not nextdns, isnt filtering issue, domain is not dnssec.

Try this hostname.

gitlab-01.atx.netgate.com

In my nextdns log, it shows as the lookup, but the logging isnt that useful for debugging purposes as it doesnt really show the result of the query.  Just confirms it is not filtered or relayed.

Result from nextdns forwarder.

Non-authoritative answer:
*** Can't find gitlab-01.atx.netgate.com: No answer

Result from cloudflare dns forwarder.

Non-authoritative answer:
Name: gitlab-01.atx.netgate.com
Address: 172.27.25.39

2 replies

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    • Dace_Wills
    • 13 days ago
    • Reported - view

    The issue arises because NextDNS cannot resolve gitlab-01.atx.netgate.com, while Cloudflare DNS successfully returns 172.27.25.39. This IP Website belongs to the private IP range (RFC 1918), which is non-routable on the public internet. NextDNS may block or ignore queries that return private IPs to prevent potential DNS misconfigurations or leaks, whereas Cloudflare DNS resolves it without such restrictions. To troubleshoot, check the authoritative nameserver for the domain using tools like dig or nslookup, and ensure there is no misconfiguration. If this domain is part of an internal/private network, ensure NextDNS settings allow private IP resolution where necessary.

    • R_P_M
    • 13 days ago
    • Reported - view

    I'm not seeing any issue with that domain, in my location. What PoP are you connected to with your nextdns setup? (check with visiting https://ping.nextdns.io)

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