Azure VM ICMP

Question

Hello,

I need to check if our VM is having internet connection or not by running script to monitor status icmp reply to 8.8.8.8 for example. This iscript is running well on onprem vm but not on azure vm due in azure vm we can't do the icmp.

So it's possible to setup azure vm can do icmp to the internet?

Answer 1

Hi @Handian Sudianto ,

using ICMP in an Azure VM should be possible.

As an alternative you can use the PowerShell cmdlet Test-NetConnection for testing.

ping 8.8.8.8

if ((Test-NetConnection -ComputerName 8.8.8.8 -Port 53).TcpTestSucceeded){
Write-Host "Internet connection is working (tested Google DNS successfully)"}

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Regards

Andreas Baumgarten

Answer 2

@Handian Sudianto ,

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 know if you could make outbound ICMP Pings from an Azure VM.

This is possible, provided you are "not" using Default outbound access.

• For more information, see : When is default outbound access provided?
• See : Default outbound access constraints
• 

While there are different explicit outbound connectivity methods, only Standard Public IP can support outbound ICMP Pings.

i.e.,

• Associate a Standard public IP to any of the virtual machine's network interfaces (if there are multiple network interfaces, having a single NIC with a standard public IP prevents default outbound access for the virtual machine).

Not Supported (even if they are explicit outbound connectivity):

• Note that a NAT gateway would not work.
  • For Ping traffic, NAT Gateway is not ideal and not supported.
  • See : NAT Gateway constraint
  • 
• Azure Load Balancer Usage considerations
  • 

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

Thanks,

Kapil

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