Microsoft Azure KYC Verification How to Connect to Azure VM via SSH

Azure Account / 2026-05-20 13:42:54

Introduction: The Great SSH Quest

Connecting to an Azure VM via SSH is one of those tasks that feels simple right up until it isn’t. You click a few things in the Azure portal, paste a command, and then—surprise—you get an error message that reads like it was written by a haunted printer. Don’t worry. This guide is here to help you connect calmly, correctly, and with minimal interpretive damage to your keyboard.

We’ll cover everything you need to establish an SSH connection to an Azure Virtual Machine: prerequisites, Azure-side setup, the client-side steps, and the most common troubleshooting scenarios. By the end, you’ll be able to connect reliably and explain what you did to at least one other human being (and maybe to your future self, who will also need it).

Microsoft Azure KYC Verification Before You Start: What “SSH into Azure VM” Actually Means

SSH (Secure Shell) is a protocol that lets you connect securely to a remote machine over the network. In Azure’s case, you typically connect to a VM using:

The VM’s public IP address (or DNS name),
Microsoft Azure KYC Verification A Linux-compatible username (commonly azureuser or something you configured),
An SSH private key that matches the VM’s configured public key,
Network access that allows inbound SSH traffic (usually port 22).

If any of those four elements are mismatched, SSH will respond with the networking equivalent of shrugging and walking away.

Prerequisites Checklist (So You Don’t Start a Fire)

Let’s make sure you have what you need. Gather these items before launching into commands:

Access to the Azure portal for your subscription/resource group.
Your VM details: resource group, VM name, and region.
SSH client: Linux/macOS usually already has it; Windows users may need to use OpenSSH or a tool like PuTTY.
SSH keys: a private key file (like id_rsa), and ideally you remember the key you used when creating the VM.
VM username (the username configured on the VM, e.g., azureuser).
Network path: either the VM has a public IP and port 22 is reachable, or you’re connecting through a private network approach (like a bastion/jump host).

Also, if your VM is brand new, give it a moment. Azure sometimes needs a few minutes to fully provision services—especially if you just created the machine and expected it to be instantly available like a fast-food milkshake.

Azure-Side Setup: Make Sure SSH Traffic Can Reach the VM

Even if your SSH command is perfect, Azure will still block you if the network rules don’t allow inbound connections to port 22. There are two common setups:

Option A: VM with a Public IP (Direct SSH)

This is the most straightforward approach. Your VM’s network interface must expose a public IP, and inbound security rules must allow TCP traffic on port 22.

Option B: Private VM (SSH via Bastion or Jump Host)

If your VM doesn’t have a public IP, you’ll typically need a bastion host or VPN/jump host. This article focuses on the direct SSH method and includes guidance for diagnosing the common “port unreachable” problems. If you’re using a bastion, the SSH mechanics might still apply once you reach the target network, but the connection path is different.

Step 1: Find the VM’s Public IP or DNS Name

To connect, you need the address of the VM. In the Azure portal:

Go to Virtual machines.
Select your VM.
Look for the Public IP address (or a blade that shows networking details).

Write down the public IP (like 52.170.x.x). If you see a DNS name, you can also use that. Either way, make sure it matches the VM you’re trying to access—Azure loves being helpful by hosting multiple similar things that all look correct until you pick the wrong one.

Step 2: Confirm the VM’s OS Type (Linux vs Windows)

SSH is for Linux/Unix systems. If your VM is Windows, you’ll typically use RDP instead of SSH (unless you intentionally configured OpenSSH on Windows, in which case… you’re living dangerously and should still be able to SSH).

In the portal, confirm the VM’s OS. Most people doing this guide for “SSH into Azure VM” are using a Linux image.

Step 3: Get the Correct Username

Your SSH command includes a username. During VM creation, Azure typically asks you to provide a username such as:

azureuser (common default in many templates),
Your custom username you chose.

If you’re unsure, check the VM configuration or the creation settings. Using the wrong username is a classic source of “Permission denied (publickey)” or similar headaches.

Step 4: Ensure SSH Port 22 Is Allowed

Now the network part. Azure security is built on Network Security Groups (NSGs). If your NSG blocks inbound port 22, SSH will fail even if your keys are perfect.

Where the NSG Rules Live

Microsoft Azure KYC Verification In the VM page, find Networking.
Look for the Network security group associated with the VM’s network interface or subnet.
Open that NSG and check inbound rules.

What the Rule Should Look Like

You generally want an inbound rule similar to:

Protocol: TCP
Port: 22
Source: either your IP address (best) or Internet (least restrictive)
Action: Allow

Security tip with a wink: if you temporarily open to the whole Internet just to test, remember to tighten it afterward. Azure won’t stop you from leaving the door wide open, but your future self might write an angry blog post about it.

Step 5: Use the Correct SSH Key Pair

SSH authentication usually uses public key cryptography. That means:

The VM must have your public key installed.
Your local machine must have the matching private key file.

If you created the VM with a specific key pair, you must use the matching private key locally. If you generated a new key after the VM was created, that new key won’t magically work unless you also updated the VM’s authorized keys.

Step 6: Connect from Linux or macOS (The “Works 80% of the Time” Method)

On macOS and Linux, OpenSSH is typically installed. The basic command is:

ssh username@vm_public_ip

If you need to specify your private key file:

ssh -i /path/to/private-key username@vm_public_ip

If your key file is named something like id_rsa and it’s in your default ~/.ssh directory, you may not need -i.

Example

Let’s say:

Username: azureuser
Public IP: 52.170.10.20
Private key: ~/.ssh/id_rsa

Your command might be:

ssh -i ~/.ssh/id_rsa [email protected]

First-Time Connection: Host Key Prompt

On the first SSH connection to a given host, you may see something like:

“The authenticity of host ‘…’ can’t be established”
Fingerprint information
Prompt: “Are you sure you want to continue connecting?”

This is normal. If you trust you’re connecting to the correct VM, type yes. SSH uses host keys to help prevent man-in-the-middle attacks. If you keep seeing this prompt every time, you may be connecting to a different IP or your known_hosts is getting reset.

Step 7: Connect from Windows (PowerShell / OpenSSH / PuTTY)

Windows has a few paths to SSH. Let’s cover the most common ones.

Method 1: PowerShell with OpenSSH

Microsoft Azure KYC Verification Check whether OpenSSH client is available. In PowerShell, run:

ssh -V

If that prints a version, you’re good.

Then use:

ssh -i C:\path\to\private-key azureuser@vm_public_ip

Common snag: private key permissions and file formats. Windows can be picky about key file handling, especially if the key has a passphrase or if you copied it incorrectly.

Method 2: PuTTY (PSCP and Friends Not Required)

PuTTY is a popular Windows SSH client. To use it:

Open PuTTY.
Enter the VM public IP in the “Host Name” field.
Set the port to 22.
Go to “Connection - SSH - Auth”.
Specify your private key file (PuTTY may require PPK format).

If your key is in OpenSSH format (.pem or id_rsa), you may need to convert it to PuTTY’s PPK format using PuTTYgen.

Step 8: If SSH Doesn’t Work, Here’s Your Troubleshooting Playbook

Now for the part nobody enjoys: troubleshooting. The good news is that most SSH failures fall into a few predictable categories. The bad news is that SSH errors are notoriously cryptic, like a fortune cookie that only says “no.”

Problem 1: “Connection timed out”

This usually means network traffic to port 22 isn’t reaching the VM. Common causes:

Microsoft Azure KYC Verification NSG inbound rule doesn’t allow TCP 22.
Firewall or security appliance in between (less common for direct public IP).
You’re using the wrong IP address.
The VM is stopped or not fully provisioned.

What to do:

Confirm the VM is in a Running state.
Check NSG inbound rules for port 22.
Verify you’re using the VM’s correct public IP.
Temporarily test from a different network to rule out local firewall issues.

Problem 2: “No route to host”

This implies routing/network reachability problems. Usually:

Wrong IP.
Public IP isn’t assigned.
Your ISP/network blocks outbound traffic to the target.

What to do:

Re-check the public IP in Azure portal.
Confirm the NIC has the public IP association.
Try again from another network (like a phone hotspot) if possible.

Problem 3: “Connection refused”

If you get “Connection refused,” the network path exists, but the VM (or service) isn’t accepting connections on port 22. Common causes:

The SSH daemon (sshd) isn’t running.
SSH is configured to listen on a different port.
The OS image or configuration doesn’t include SSH server.

What to do:

If you can access the VM console (Azure Serial Console or other tooling), check whether sshd is running.
Confirm that port 22 is open at the OS level too (cloud firewalls usually handle this, but misconfig happens).

Once you’re inside, you might check:

sudo systemctl status ssh (Ubuntu/Debian commonly uses “ssh” service)
sudo systemctl status sshd (some distros use “sshd”)
Microsoft Azure KYC Verification sudo ss -tulpn | grep :22 to see what’s listening on port 22

If you need to restart it:

sudo systemctl restart ssh or sudo systemctl restart sshd

Problem 4: “Permission denied (publickey)”

This is the big one. It usually means you connected successfully, but your SSH key isn’t accepted by the VM.

Common causes:

You’re using the wrong private key file.
The VM doesn’t have your public key installed.
The username is incorrect.
Key file permissions are too open on your local machine.

What to do:

Make sure you’re using the correct key with -i.
Confirm the username is correct.
Check local key permissions on Linux/macOS:

chmod 600 /path/to/private-key

If SSH still refuses, the VM likely doesn’t have your public key in the right place.

Problem 5: “Authentication refused: bad ownership or modes”

This error usually indicates your .ssh directory or files on your local machine (or on the VM) have incorrect permissions.

On the VM, common expected permissions are:

~/.ssh: 700
~/.ssh/authorized_keys: 600

And on your local key, SSH typically wants:

Private key: 600

If you get this error on the VM side, you’ll need console access to fix permissions (or correct the configuration using Azure tools).

Problem 6: “Host key verification failed”

This usually means SSH sees a different host key than the one recorded in your `known_hosts` file. Causes include:

The VM was rebuilt/replaced.
The public IP changed.
You’re connecting to the wrong host.

What to do:

Verify you’re connecting to the correct IP/VM.
Microsoft Azure KYC Verification Remove the old host key entry from ~/.ssh/known_hosts (carefully).

On Linux/macOS you can remove a specific entry using something like:

ssh-keygen -R 52.170.10.20

Then reconnect to accept the new fingerprint.

Problem 7: “SSH handshake failed”

This is a “something negotiated incorrectly” category. Common causes:

Older SSH clients and newer server configurations (or vice versa).
Security policy differences (cipher/MAC mismatch).

What to do:

Try a newer SSH client version.
Microsoft Azure KYC Verification Use verbose logging: ssh -vvv to see details about the handshake. SSH will basically tell you which algorithm it didn’t like.

Useful Command Variations (When You Need More Clues)

If things aren’t working, don’t just stare at the error like it owes you money. Use SSH’s verbosity.

Verbose Mode

ssh -vvv username@vm_public_ip

This provides step-by-step details. It’s noisy, but it’s also like turning on “developer mode” for SSH.

Test Connectivity to Port 22

On Linux/macOS:

Use nc (netcat) if available: nc -vz vm_public_ip 22
Use telnet if you have it (less recommended): telnet vm_public_ip 22

On Windows PowerShell, you can try:

Test-NetConnection -ComputerName vm_public_ip -Port 22

If the port isn’t reachable, focus on networking (NSG, public IP, route, firewall). If the port is reachable but authentication fails, focus on keys and usernames.

Connecting with the Azure VM Serial Console (When SSH Is Down)

Sometimes you can’t SSH in yet because the network or SSH service isn’t configured. Azure provides ways to access a VM console for troubleshooting in many setups.

In practice, you would:

Open the VM’s console capabilities in the portal (depending on the VM setup).
Log in locally (as a console user) and check sshd status and configuration.

This is especially helpful when SSH isn’t running. It’s basically the “I can’t reach the front door, so I’m using the back window to check the Wi-Fi router” approach.

Updating or Adding SSH Keys (If You Used the Wrong Key Pair)

If you created a VM with one key pair and now you have a different private key, you’ll need the VM to trust the new public key. The most common method is to install the correct public key into the VM’s user account.

At a high level, you:

Get your public key (for example, from your local private key’s corresponding public key).
Ensure it’s placed into the target user’s ~/.ssh/authorized_keys.
Set permissions correctly on ~/.ssh and authorized_keys.

Because this varies depending on how the VM is set up (and whether you can access it via console), treat this as a conceptual overview. If you tell me your current error message and whether you created the VM with SSH keys or passwords, I can tailor the exact approach.

Security Best Practices (So You Don’t Accidentally Host an Open House)

It’s tempting to get SSH working by opening port 22 to all IPs and calling it a day. That approach works… until it doesn’t, and then you spend your weekend reading logs while trying to figure out why the world is suddenly very interested in your VM.

Here are practical best practices:

Restrict inbound port 22 to your office/home IP (or VPN subnet) rather than the entire Internet.
Disable password authentication if your VM supports it and you rely on keys.
Use strong keys (modern RSA sizes or Ed25519).
Keep SSH updated by applying OS security patches.
Use non-root logins and elevate with sudo when needed.

If you want, you can also enable features like fail2ban, but start with the basics: reachable network + correct keys + correct permissions.

Common “Gotchas” People Run Into (The Stuff That Haunts Forums)

Here’s a quick list of classic issues, in no particular order. If you recognize yourself in any of these, congratulations: you’re normal.

Using the wrong IP: You connected to a different VM in the same resource group.
Forgetting -i: Your key file isn’t the default key that SSH tries.
Wrong username: Key belongs to a different user account on the VM.
Bad NSG rule: Port 22 is blocked or scoped incorrectly.
SSH service not running: You created a minimal image without SSH server.
Local key permissions wrong: SSH refuses to use the key because it’s too permissive locally.
VM not running: You’re connecting to a stopped instance.

A Simple End-to-End Example (No Theater, Just Steps)

Microsoft Azure KYC Verification Let’s say you want to connect to a Linux Azure VM via SSH.

In Azure portal, open your VM and note the Public IP.
Confirm the VM is Running.
In NSG inbound rules, ensure port 22 is allowed from your IP.
Identify your SSH username (example: azureuser).
Use your matching private key locally.
Run: ssh -i ~/.ssh/id_rsa [email protected]
If prompted about host authenticity, type yes (once).

If all goes well, you’ll land in a shell prompt and start doing whatever you came to do—install packages, deploy apps, or just poke around like an explorer who definitely shouldn’t be allowed near production.

When You Should Consider Azure Bastion or Other Approaches

If you’re working in an environment where security rules are strict or public IP access isn’t desired, you may want alternatives:

Azure Bastion (web-based SSH/RDP without exposing public SSH directly)
VPN or ExpressRoute to access private networks
Jump host / bastion VM inside the network

This article focused on the direct SSH workflow because it’s the most commonly requested. But if your organization has compliance requirements, you’ll likely need a different pattern. That’s not a problem; it’s just a different route to the same destination: a shell prompt and a job that finishes.

Conclusion: You Can Now SSH Into Your Azure VM Like a Pro

Connecting to an Azure VM via SSH is mostly about three things: reachability, identity, and trust. Reachability means port 22 is actually open and routable. Identity means you’re using the correct username. Trust means your private key matches the public key installed on the VM (and the permissions aren’t sabotaging you).

If it fails, don’t panic. Start by confirming networking (timeouts and refusals), then authentication (permission denied), then host key issues. Use verbose logging and simple port checks to narrow down the cause quickly.

Now go forth and connect—may your keys match, your NSG rules be sane, and your SSH errors be brief, polite, and easy to interpret. If you share your exact error message and your OS/client (Windows/macOS/Linux), I can help you pinpoint the exact cause in a couple of steps.