How to change an Azure VM RDP public port number

Tonight I decided to connect to my Microsoft Windows Azure environment from a hotel to test a few things.  When I tried to connect via RDP I was unable to successfully connect. 

  • I signed into my Azure account.
  • I chose my VM.
  • I clicked connect.

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  • I chose to open the RDP file.

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  • I clicked connect at the security warning.

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  • It hung for a while at connecting to.

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  • Eventually I got the typical remote desktop can’t connect to the remote computer for one of these reasons error.  

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  • This was odd as the VM is on and I had internet access.  I decided to look at the endpoints.  I noticed the public endpoint for RDP was an Azure typical high random public port number.  I wondered if there was something at this hotel that was blocking outbound access on that high port number. 

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  • I decided to edit the RDP public port number by clicking edit.

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  • I changed the port number to something lower(from 55220 to 20309).

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  • Azure updating.

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  • Azure updated.

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  • Now the public RDP port number was a little lower. 

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  • I went through the same steps to RDP to my Azure VM.
  • Connect

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  • Open the RDP file.

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  • Connect anyway in the security warning box.

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  • It tried to connect on that lower port number.

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  • It worked!

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Sometimes you can’t control or even know about the environment you’re at but it’s always nice to know you can change some things in Azure to get around it. 

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