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Settting up Reverse DNS for email authenticity

Lokesh Yogi 0 Reputation points
2024-02-12T11:28:28.43+00:00

IP for my website is 4.224.72.70 & it is live at dev.eximpedia.app I followed the following steps to host the reverse DNS zone

  1. I created a reverse DNS zone with name 72.224.4.in-addr.arpa
  2. now i set thr PTR record with following details
    a. Name - 70
    b. record type - PTR
    c. FQDN - dev.eximpedia.app
  3. now i am verifying it whether rDNS is setup or not with "nslookup 4.224.72.70" cmd
    but it is still not reflecting the name of domain.
    tell me what could i have done wrong ?
Azure DNS
Azure DNS
An Azure service that enables hosting Domain Name System (DNS) domains in Azure.
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  1. KapilAnanth-MSFT 36,396 Reputation points Microsoft Employee
    2024-02-12T13:18:27.7+00:00

    @Lokesh Yogi

    Welcome to the Microsoft Q&A Platform. Thank you for reaching out & I hope you are doing well.

    I understand that you would like to configure reverse DNS lookup for your site "dev.eximpedia.app".

    I am afraid the above approach is incorrect.

    • The steps you specified only works if you are the owner of the IP addresses in the range 4.224.72.x
    • However, these IPs are Azure Owned (atleast, a portion of them) and hence you cannot specify the Reverse DNS Zones for them.
    • Instead, you have to configure the Public IP so that the internal Platform
      • Checks if the DNS name "dev.eximpedia.app" resolves to the IP "4.224.72.70" or not
      • If this succeeds, Azure will internally add the reverse lookup.

    To make this work, you must :

    • I see that the IP "4.224.72.70" is an Azure Public IP
    • Also, resolution of dev.eximpedia.app to 4.224.72.70 works.
    • In this case, you must follow the document : Reverse DNS for public IP address resources.
    • You should do this via Powershell
    $pip = Get-AzPublicIpAddress -Name "<NameOfYourPip>" -ResourceGroupName "
$pip.DnsSettings = New-Object -TypeName "Microsoft.Azure.Commands.Network.Models.PSPublicIpAddressDnsSettings"
$pip.DnsSettings.DomainNameLabel = "
$pip.DnsSettings.ReverseFqdn = "
Set-AzPublicIpAddress -PublicIpAddress $pip

    Kindly let us know if this helps or you need further assistance on this issue.

    Thanks,

    Kapil

    Please don’t forget to close the thread by clicking "Accept the answer" wherever the information provided helps you, as this can be beneficial to other community members.

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