Certificate Alt Names
As of a month or so (been on vacation) I've been getting notifications on Uptime Kuma with the following;
Down 2025-08-28 00:41:21 Hostname/IP does not match certificate's altnames: Host: rvs_ch.com. is not in the cert's altnames: DNS:c_w.com, DNS:www.c_w.com
The Host is my correct domain, the altnames domain is absolutely not mine. What is happening here?
I also see errors like; getaddrinfo EAI_AGAIN rvs_ch.com
I'm on the free tier of cloudflare. Whenever this error pops up the domain is still reachable like normal.
I kind of just want to know why this is popping up and if there's anything I can do on my side to get rid of this.
5 Replies
It's probably because it's unproxied and your origin is serving the cert, but can't check because
rvs_ch.com is not a real domain, afaik underscores aren't even allowed in actual domain namesApologies @Chaika , I wasn't sure if sharing domain names was allowed or not. The domain rvsfinishingtouch.com is hosted locally on my own server through a Cloudflare tunnel. The domain it's showing in the error is cashnow.com
hmm, loads fine for me
I think something might be MITMing your connection. cashnow.com does not even use Cloudflare at all, no reason for CF to have their cert
EAI_AGAIN is DNS Timeout
You could try switching on DNS over HTTPS in your browser https://developers.cloudflare.com/1.1.1.1/encryption/dns-over-https/encrypted-dns-browsers/ (don't have to pick Cloudflare as the provider, could pick Google or anyone other provider), and then go from there
OK Thanks. i will look into this