Microsoft Azure Set rDNS

To set rDNS for an IP, first make it static. Then use Azure CLI

boby@hon-pc-01:~$ az network public-ip update --resource-group serverok --name ok-vmPublicIP --reverse-fqdn azure-rdns.serverok.in --dns-name  ok-vm
{
  "dnsSettings": {
    "domainNameLabel": "ok-vm",
    "fqdn": "ok-vm.southeastasia.cloudapp.azure.com",
    "reverseFqdn": "azure-rdns.serverok.in"
  },
  "etag": "W/\"1046148c-e501-49e0-a673-942b75dd71ad\"",
  "id": "/subscriptions/7adb2f54-bc45-4d4d-a5ec-321ca213d39d/resourceGroups/serverok/providers/Microsoft.Network/publicIPAddresses/ok-vmPublicIP",
  "idleTimeoutInMinutes": 4,
  "ipAddress": "52.187.107.150",
  "ipConfiguration": {
    "etag": null,
    "id": "/subscriptions/7adb2f54-bc45-4d4d-a5ec-321ca213d39d/resourceGroups/serverok/providers/Microsoft.Network/networkInterfaces/ok-vmVMNic/ipConfigurations/ipconfigok-vm",
    "name": null,
    "privateIpAddress": null,
    "privateIpAllocationMethod": null,
    "provisioningState": null,
    "publicIpAddress": null,
    "resourceGroup": "serverok",
    "subnet": null
  },
  "ipTags": [],
  "location": "southeastasia",
  "name": "ok-vmPublicIP",
  "provisioningState": "Succeeded",
  "publicIpAddressVersion": "IPv4",
  "publicIpAllocationMethod": "Static",
  "resourceGroup": "serverok",
  "resourceGuid": "93193015-45df-4408-9c49-19148f9556e5",
  "sku": {
    "name": "Basic"
  },
  "tags": {},
  "type": "Microsoft.Network/publicIPAddresses",
  "zones": null
}
boby@hon-pc-01:~$ 

–resource-group serverok

Is the resource group name.

–name ok-vmPublicIP

ok-vmPublicIP is name of my public IP. You can see it in Azure console.

–reverse-fqdn azure-rdns.serverok.in

azure-rdns.serverok.in is the reverse DNS i need. I pointed A record for this domain to Azure IP address.

–dns-name ok-vm

ok-vm is name of my VM.