Subdomain randomly stops resolving

Website, Application, Performance DNS & Network
1

What is the name of the domain?

git.nyeki.dev

What is the issue you’re encountering

DNS queries (for a wildcard subdomain) resolve for some minutes, then stop resolving without anything changed. If I add a specific override for that subdomain, then it starts resolving again for a while, then stops resolving again. I tried using third-party tools to check that it wasn’t my local machine the only one having issues, but no resolvers (1.1.1.1, 8.8.8.8) resolve to that specific subdomain. If i add an intentional typo to the subdomain (e.g. gitt.nyeki.dev), it resolves properly.

What feature, service or problem is this related to?

DNS not responding/updating

2

The third party tools I tried using were}

dig git.nyeki.dev @1.1.1.1
dig git.nyeki.dev @8.8.8.8

and nslookup.io. The domain should return a CNAME record, but it returns nothing. I also checked the CF status page and it says that theres an ongoing maintenance at my server’s location’s CF datacenter, but I’d doubt that’s the issue since it doesn’t resolve anywhere. I’m not using CF’s DNS proxying.

3

The wildcard subdomain is *.nyeki.dev and it’s got a CNAME record to another domain, with automatic TTL and no CF proxy, as previously said.

4

We’ve had a similar problem in the EU region where our service no longer recieves requests from our DNS at a couple points in the day. I’ve raised a support ticket to see if CF can investigate

5

Works for me from wherever I try:

dig git.nyeki.dev @1.1.1.1 +short
moan.dev.

dig git.nyeki.dev @8.8.8.8 +short
moan.dev.

dig git.nyeki.dev +short
moan.dev.

I’ve refreshed the record every 20 seconds for ~half an hour now and didn’t encounter any problems.

Could you let me know the next time you encounter these problems?

6

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