One project lost connection to domain due to DNS record not found (even when it exists).

tribariPRO

a year ago

Hello,

one of my project services lost its connected domain in public network settings. The domain is maintained via Cloudflare, a subdomain entry which is used by the service is created, the required CNAME record exists since months. Everything was working fine until now, today Railway lost the connection and says that the CNAME record has not been found yet.
I don´t know what happened because I haven´t changed anything. Do you have any advice? Is it maybe an issue on Railway?

Thanks in advance.

Regards,
Marco

Solved

6 Replies

tribariPRO

a year ago

2ab109ed-eb41-4a32-a7c9-f2bcac695992


a year ago

Interesting, do you mind sharing some screenshots of the services public networking and your DNS settings in cloudflare?


tribariPRO

a year ago

Attached you will see the settings at the service and a copy of the DNS setting in Cloudflare.

1227643814852821000
1227643815092031500
1227643815658258700


a year ago

does the domain work?


tribariPRO

a year ago

yes sure, was the first thing I´ve checked.


a year ago

very odd, can you remove the domain from the service and add it right back, but don't touch anything in cloudflare


tribariPRO

a year ago

I will try


tribariPRO

a year ago

but it will mean that I will have to update the CNAME entry at Cloudflare, because the record value has changed on Railway side then.


a year ago

you would not need to, that value is completely random and only serves as a means for cloudflare to resolve an IP address


tribariPRO

a year ago

this hasnt changed anything except that I should update the CNAME to the new value now. 😉


a year ago

it will tell you to do that, but you don't strictly need to


a year ago

what is this MIT proxy? and how does it differ from what that button normally says?


tribariPRO

a year ago

It´s "with proxy enabled" at cloudflare settings.


tribariPRO

a year ago

Have tried disabling, but hasnt changed anything as well. Or maybe I am not patient enough.


a year ago

Right but why does it say MIT proxy, I haven't seen the MIT part of that ever


tribariPRO

a year ago

Cloudflare uses that proxy to route it threw their firewall if proxy is enabled I guess.


a year ago

I get that but yours says "MiT Proxy" mine just say "Proxied"


tribariPRO

a year ago

Ahh, yeah its just because of the language… in german it says "mit proxy" which is in english language "proxied" i guess.


a year ago

okay that makes sense, sorry for the confusion


tribariPRO

a year ago

no worries, sometimes its a bit confusing with different languages.


a year ago

would you happen to have any other records on that subdomain?


tribariPRO

a year ago

Ok, maybe I have found the issue. If its the reason then it wasn´t a problem at your side. Seems like the NS settings have changed. Currently figuring out why it happened.
Since I am sure that this was the reason I would suggest that I will write again once I have any results from it.


tribariPRO

a year ago

It was the reason. Sorry for the inconvenience!

The post can be closed now. Seems like the original host (IONOS) has changed the NS settings to default and so Cloudflare wasn´t responsible for the domain anymore.


Status changed to Solved railway[bot] about 1 year ago


a year ago

Ah that is incredibly odd, thank you for letting me know the root cause, now I'll have some additional insights into this issue if someone ever opens a similar issue in the future!


tribariPRO

a year ago

Something I never would´ve thought on my own - needed our discussion to let me have a view on it.

Thank you for your help and patience.


bobro-krabHOBBY

a year ago

Got same problem right now with one of my services. I'll check if my domain registar is working, mb namecheap changed something too.

Looks suspicious, because i've got problem at the same time as tribari.

And more suspicious thing is i have 2 domains from them, both of them has CNAME to railway and one is still working, while another is not


a year ago

happy to help


a year ago

That is very odd as well.


bobro-krabHOBBY

a year ago

For now i think it's just a coincedence. One of this domains is just not resolving, while other is ok. I guess i'll write to namecheap's support


a year ago

Let me know how that goes!


bobro-krabHOBBY

a year ago

No news.
I'll try again in an hour and will keep you updated


bobro-krabHOBBY

a year ago

Still no resolve for one address. I beleive we can close this topic, problem is not on railway side. Thanks anyway :)