Is it possible to ping 8.8.8.8 without a public IP associated with an Azure VM?

Question

I am currently working with two Azure VMs (one running Linux and the other running Windows) that are located in the same virtual network. While I can access the internet from both machines (browsing, running sudo apt update, and using curl), I'm facing issues with ICMP pings.

Current Situation:

• VMs: Both VMs are in the same Azure virtual network.
• Internet Access: Internet access is available; I can browse and run updates.
• Ping: I can ping other machines within the same virtual network, but I'm unable to ping external addresses like 8.8.8.8 or google.com.

Firewall Settings:

• The firewall is disabled on both VMs.
• I have added inbound rules for ICMP on both VMs.

Understanding:

From my research, I understand that:

• Outbound ICMP Pings are possible only when the VM has a dedicated public IP associated with its NIC.
• Neither NAT Gateway nor Load Balancer outbound rules can help with this issue.
• The suggested workaround is to use TCP Ping (like Telnet or Test-NetConnection) instead of ICMP Ping.

Questions:

1. Is it possible to enable ICMP pinging to external IPs (like 8.8.8.8) from an Azure VM without a public IP?
2. Are there any additional configurations or settings I should consider to achieve this?

Any guidance or suggestions would be greatly appreciated!

Answer 1

@Niket Kumar Singh ,

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

Your observation is correct.

Outbound ICMP Pings are possible only when the VM has a dedicated public IP associated with its NIC.

To address your queries,

1. Is it possible to enable ICMP pinging to external IPs (like 8.8.8.8) from an Azure VM without a public IP?
   1. No, it's not possible
   2. You should have a dedicated Public IP Attached to it
2. Are there any additional configurations or settings I should consider to achieve this?
   1. Should you require this, please assign a Public IP to the VM's NIC

Hope this clarifies.

Thanks,

Kapil

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