Free managed app service cert creation/generation failing with below CNAME error:
Error:Failed to create App Service Managed Certificate for hostname Subdomain.rootdomain.com. Click here for more details. Error Details: Properties.CanonicalName is invalid. Current CNAME records of the hostname are Subdomain.someotherdomain.com,subdomain.trafficmanager.net,subdomain.azurewebsites.net
I was able to repro and make it work if my CName mapping is via subdomain to my default *.azurewebsites.net.
However, the issue seems to be appearing when my CName points to another subdomain before the default *.azurewebsites.net as seen in error message below:
Any insights on this issue is appreciated?
You are seeing this behavior as it’s not a supported feature in Azure App Services yet.
While generating managed free certificated azure will run certain checks on domain and looks for a valid CName ie, either pointed to “.azurewebsites.net” or “.trafficmanager.net”
In order to solve this problem please follow below steps in order:
Remove Cname Subdomain.someotherdomain.com (sub.devopsauthor.com), make sure there is only
one Cname which is pointed to either “.azurewebsites.net” or
“.trafficmanager.net”
Now attempt to generate the Certificate and bind it to domain.
If you still want the Subdomain.someotherdomain.com after cert
generation, you can readd the Cname.
Related
The Azure Portal has changed how they issue certificates. I have not been able to figure out how to secure the www of my app service domain name. I was able to apply a new cert to the root domain jasonrsmithmusic.com but not www.jasonrsmithmusic.com with the following error:
Error adding managed certificate: Properties.CanonicalName is invalid.
Current CNAME records of the hostname www.jasonrsmithmusic.com is
jasonrsmithmusic.com
=======================================
Update: Made progress based on an answer below but the cert is still listed as invalid.
I tried to reproduce the same in my environment added www.subdomain successfully.
Note: To map a subdomain www.jasonrsmithmusic.com ensure you should use A record instead of CNAME record like below.
To resolve this issue, you need to add a new custom domain name along with www.jasonrsmithmusic.com I have one previous custom domain name as travwebapp.com I use this custom domain as www.travwebapp.com like below.
And added a service managed certificate.
To know more in detail please check this reference
Map existing custom DNS name - Azure App Service | Microsoft Learn
Add and manage TLS/SSL certificates - Azure App Service | Microsoft Learn
It seems like I have my A CNAME and TXT records correct for my Azure App but My Domain name is still not resolving.
Error:
404 Web Site not found.
You may be seeing this error due to one of the reasons listed below :
Custom domain has not been configured inside Azure. See how to map an existing domain to resolve this.
Client cache is still pointing the domain to old IP address. Clear the cache by running the command ipconfig/flushdns.
Here is my source tutorial:
https://learn.microsoft.com/en-us/azure/dns/dns-web-sites-custom-domain
If you're getting that message, you probably haven't configured the domain as a Custom Domain.
In Portal go to the App > Custom Domain and make sure it's there.
If you do have it added, it's possible the A record is pointing to the wrong IP. You can check if it matches the one in the Custom Domain blade by running the following command in your command line:
nslookup <your domain>
I have build a new webapp on Azure. So i followed that steps:
Add A Record (A/#/52.173.76.33), a CNAME (CNAME/www/saschamannsde.azurewebsites.net) and a TXT (TXT/#/saschamannsde.azurewebsites.net)
Added a custom domain to the webapp (Then it is listed as available host)
Upload the PFX and CER and bind it to my domain.
Azure now shows me, that it is a valid Certificate with my hostname saschamanns.de and issued by Sectigo RSA Domain Validation Secure Server CA (ID 134d36755287a5e0718554ff9c9103d13f331d34).
If i now typing https://saschamanns.de the browser tells me, i have a false cert, issued for shortener.secureserver.net.
Inside the Supportpage of Azure it tells me two problems:
Certificate mismatch detected (
The hostname saschamanns.de is configured to a Certificate with the thumbprint 134d36755287a5e0718554ff9c9103d13f331d34 on this Azure web app. However, the site returned a certificate with thumbprint 22873d8fefeb318394d1b906a5e4657876552d80.) A traceroute gives me:
https://paste.ubuntu.com/p/5427RCBmMF/
And it looks like it routes to the MS Routes.
DNS resolution error detected (As per the current DNS settings, URL saschamanns.de resolves to 184.168.131.241. The web app on Azure however is configured to listen on 52.173.76.33.)
But i have already set the IP to 52.173.76.33. The other IP comes from my Domain Manager GoDaddy.
Maybe anyone can help to identify the problem?
From the Dig web interface , saschamanns.de is also pointing to 184.168.131.241 . What is this 184.168.131.241 ip ?
saschamanns.de. 599 IN A 184.168.131.241
saschamanns.de. 599 IN A 52.173.76.33
If you browse the web app , certificate ( Thumbprint : 22873d8fefeb318394d1b906a5e4657876552d80) showing in browser is issued to shortener.secureserver.net .
Certificate which is binded to web app is not issued to saschamanns.de
Can you try bind the certificate again to web app by removing the existing one. Hopefully that should resolve the issue.
I also just ran into the same issue. Basically, the reason why I got the certificate mismatch error was according to the Forwarding Feature of GoDaddy.
If you use the forwarding feature - it will add a locked "A record" entry to the domain pointing to ip.secureserver.net which in my case was 184.168.131.241.
However tanner west explains the forwarding issue in a gist article.
In a nutshell, don´t use the forwarding feature and edit the DNS forwarding manually.
This is the feature I am talking about.
Azure uses SSL across their webapps and has a cert for *.azurewebsites.net. We have been trying to setup subdomains that point to our webapp but we keep receiving security errors or redirect errors. So for example, we set an A record that points from subdomain.ourcompany.com to the assigned IP. Then we set a CNAME record for awverify.subdomain to awverify.webappname.azurewebsites.net.
When you try and access the site, we get a "too many redirects" error. I don't know if it's relevant but both ourcompany.com and www.ourcompany.com are not hosted on Azure and their A records point somewhere else.
Any idea why we're getting this error? Note that if we drop the A record and instead create a CNAME record from subdomain.ourcompany.com to webappname.azurewebsites.net, then we receive a SSL certificate error saying that the site isn't trustworthy. I tried to get around this using cloudflare but to no avail.
Any thoughts on why this is happening?
Please see this article to properly configure custom domains:
https://azure.microsoft.com/en-us/documentation/articles/web-sites-custom-domain-name/
The end result is that you will have the following in your Azure Web App:
And the following on the DNS registrar side:
Note that 23.99.65.65 is the VIP of the stamp in which my Azure Web App is hosted, and is displayed at the bottom of the Custom domains and SSL page. It should also be displayed when you resolve (your website name).azurewebsites.net via digwebinterface.com.
Once that is complete, you will have the domain correctly configured and the next step is to purchase a certificate for your site. Once you have purchase the certificate, you can configure it using the following guide:
https://azure.microsoft.com/en-us/documentation/articles/web-sites-configure-ssl-certificate/
Note: the reason you are getting an SSL error now is probably because you're using the default SSL cert, which is issued to *.azurewebsites.net. Since this doesn't match your custom domain name, it's going to be an error, although https://(your-site-name).azurewebsites.net should be okay.
For the last two days I've been unable to create a CNAME from my domain to my blob storage account. I've registered the domain and added a CNAME that points to verify.azure.com on my DNS settings, but whenever I validate it (even after waiting a few hours), it never seems to validate... the error I get the Azure portal is "An unexpected error occurred while validating the domain name. Try again later."
Are there some issues going on?
verify.azure.com will only authenticate that you have the proper key to your domain however you would need another alias to set the proper CNAME configuration. Based on what you have written above you are pointing your host to verify.azure.com, however have you setup your storage subdomain alias to your storage name as well? If you have setup both the entries correctly, and still see the problem, at your domain registrar level there are some logs available which you can request for further troubleshooting.
Get more info here and here.