Azure Cloud Services Reverse DNS

reverse Domain name resolution, in contrast to the usual forward domain resolution, provides IP address to the corresponding domain name. IP Reverse resolution is primarily applied to mail servers to block spam, especially in foreign countries.

most spammers use dynamically assigned or unregistered domain names. IP address to send spam to evade tracking, using the domain name reverse resolution, you can greatly reduce the number of spam.

How to Windows Azure provided to the user reverse DNS Parse it?

through Azure Powershell can do, Azure Powershell you can go to the following address to download:

official website of the China Region: http://www.windowsazure.cn/downloads/

GitHub : https://github.com/Azure/azure-powershell/releases

"one" setting Azure the domain name to do RDNS

# Set RDNs

$servicename = "Winmailserver" # Cloud service name

$rDNSFQDN = "winmailserver.chinacloudapp.cn." # reverse dns

Set-azureservice-servicename$servicename-reversednsfqdn $rDNSFQDN # associating reverse DNS

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# Checksum Fetch

$servicename = "Winmailserver" # Cloud service name

Get-azureservice-servicename$servicename | Select reversednsfqdn # get reverse DNS

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# Delete RDNS

$servicename = "Winmailserver" # Cloud service name

Set-azureservice-servicename$servicename-reversednsfqdn "" # Remove reverse DNS, set the value to null

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"Two" set non- Azure the domain name to do RDNS

The prerequisites are: Www.heyutan.club have to do a CName or A record the resources in your subscription account.

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# Set RDNs

$servicename = "Winmailserver"

$rDNSFQDN = "Www.heyutan.club."

Set-azureservice-servicename $servicename-reversednsfqdn $rDNSFQDN

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"Three" precautions

( 1 ) after the domain name with a full period of English $rDNSFQDN = "winmailserver.chinacloudapp.cn."

Otherwise the error is as follows:

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(2)Azurewithin the subscriptionDNSname doRDNS, there are no restrictions:Azure VIP 42.159.x.x/139.x.x.x---->subscription to any cloud service under theDNSnamexxxx.chinacloudapp.cn

However, when you want to do a custom domain name RDNS when, for example AZUREVIP 139.219.13.239 ----> Custom domain name Mail.heyutan.club , there are prerequisites, the following conditions can be satisfied:

• mail.heyutan.club must be able to parse to (that is, cname dns name xxxx. chinacloudapp.cn

• Mail.heyutan.club must be able to parse (i.e. A record) with any one of the subscriptions Reserved IP or any deployment (cloud service) VIP

Otherwise the error is as follows:

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( 3 ) The test is valid for use CMD

nslookup-q=ptr 139.219. 13.239

nslookup-q=ptr 139.219. 13.239 203.196.0.6

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( 4 ) Official reference documentation: A nnouncing Reverse DNS for azure Cloud Services Microsoft Azure Blog

http://azure.microsoft.com/blog/2014/07/21/announcing-reverse-dns-for-azure-cloud-services/

This article is from the "[email protected]" blog, please be sure to keep this source http://winhe.blog.51cto.com/7547741/1734180

Azure Cloud Services Reverse DNS