I have bought a domain name with OVH. The frontend is hosted on Netlify and use your DNS. Basically, I’ve deleted the two DNS servers provided by OVH and replaced them by your 4 DNS servers:
The website is working, with a correct TLS certificate. So far so good.
The website is communicating with a server hosted on Heroku. It works fine. However, I need to use a subdomain instead of heroku’s default url in order to be able to send cookies to Safari browsers (sameOrigin: none is not accepted by this browser).
www.hello.heroku.app should be
Ok. So I’ve added a CNAME entry to my DNS ZONE with OVH, that points to Heroku’s DNS target. Unfortunately, this CNAME is never propagated. In my DNS ZONE, I have this warning:
It seems OVH DNS ZONE’s entries can’t exist without using their default DNS entries. How can I fix this? Should I delete the DNS records in Netlify and use a different strategy?
Please note I’m a complete noob with devops. I’ve asked the question to OVH support. They answered “Netlify handles your DNS. You must modify the zone with them”.