Azure DNS

How to make a domain managed on Azure DNS point to your OtterRoute node.

What to create

In the OtterRoute panel the domain shows you the records to create. In essence:

Type	Name	Value
A	cdn (or the chosen subdomain)	the public IPv4 of the node (or of your proxy)
AAAA	same	the IPv6, if you use it
CNAME	cdn	a name that already points to the node (subdomains only, never the apex)

Steps

1. Portal → DNS zones → your zone → Record sets → Add.
2. Name, type A/AAAA/CNAME, TTL, IP address.
3. Save.

Things to watch

• Apex: DNS does not allow a CNAME on the apex. Azure offers Alias records, but towards Azure resources (public IP, Traffic Manager, CDN, Front Door, another record in the zone). Towards an external node use an A record with its IP.
• If the node has a Standard-type Azure public IP, an A/AAAA record of alias type follows it when the IP changes.
• To create alias records the Microsoft.Network resource provider must be registered.

Verifying

dig +short cdn.example.com
curl -i http://cdn.example.com/.well-known/otterroute/check

Then press Recheck in the panel: verification runs exactly these two tests (DNS, then HTTP on port 80 with the node's proof). See Domains and DNS and Troubleshooting.

Official sources — verified on 2026-09-26

• Alias records in Azure DNS

The sheet summarizes the provider's documentation on the date shown; details may change. It has not been tested live with a real account.