Summary
How to verify if Reverse DNS is working properly?
Question
How to verify if Reverse DNS is working properly for App Portal?
Answer
Open log files under logs\UserLog folder.
These entries indicate Reverse DNS failed to get machine name.
IP Address 172.21.108.33 is a VALID IPv4 Address Page_Load 2015/05/18 13:10:09 1 (0x0001)
Discovery Method is DNS. Querying DNS to get Machine Name from IP 172.21.108.33 Page_Load 2015/05/18 13:10:09 1 (0x0001)
Could not retrieve Machine Name from DNS for IP 172.21.108.33 Page_Load 2015/05/18 13:10:10 1 (0x0001)
These entries indicate Reverse DNS works well.
IP Address 192.168.0.30 is a VALID IPv4 Address Page_Load 6/22/2015 2:49:23 PM 1 (0x0001)
Discovery Method is DNS. Querying DNS to get Machine Name from IP 192.168.0.30 Page_Load 6/22/2015 2:49:23 PM 1 (0x0001)
DNS returned Machine Name as SCCM2012 for IP 192.168.0.30 Page_Load 6/22/2015 2:49:23 PM 1 (0x0001)
App Portal called .NET APIs for getting machine name from IP address similar to following Powershell script. Run below
Powershell script to isolate the root cause to see if the issue is caused by App Portal or others.==
$ComputerIPAddress = ?192.168.0.30?
[System.Net.Dns]::GetHostEntry($ComputerIPAddress).HostName
==
