Azure Network Watcher is an azure cloud service that combines all the tools in one central tool to diagnose the health of the Azure network. With tools for monitoring, diagnosing, viewing metrics, and logging in, Azure virtual networks can be enabled and disabled. Azure Network Watch has been created to repair network health cloud infrastructure and to monitor virtual machines (VMs), virtual networks, load balancers, app gateways, etc. Network Watch PaaS does not monitor and maintain web analytics.

What is Microsoft Azure Network Watcher :

Azure network watcher has tools that are divided into two categories as Monitoring tools and Diagnostic tools. These tools are used to monitor and diagnose issues in network watchers by providing a centralized hub to identify problems.

Network wat tools use the following three tools to perform monitoring tasks:

 Topology Tool: It creates a graphical image of the Azure virtual network that contains the resources used, the interconnectedness, and the relationships. So the topology tool can be used to visualize and understand the infrastructure so that new users can easily solve the problem.

 Connection Monitor Tool: It is used to check the health of the connection between two celestial bodies. If necessary, users can check if the two VMs communicate with each other. It can capture changes to the network configuration or NSG rules and look for any failures or changes. If a failure/problem occurs, then it explains why it happened and how it can be fixed. 

Network Performance Monitor:  It monitors the endpoint-to-end connection of resources and enables you to track or alert system latency. This gives users a centralized view of the network.

There are six diagnostics tools in Network Watcher as below:

 IP Flow Verify Tool:  It identifies whether a particular packet is approved or rejected in a virtual machine. If packers are denied in NSG, the tools give you the name of that group. 

Next Hop Tool: Utilizing this, clients can decide how a bundle will get from one VM to some other. Utilizing source organization, source IP address, and objective VM IP instrument decides the parcel's objective and can be utilized to analyze the wrong directing tables. 

Effective Security Tool:  It shows all the successful NSG rules which are to be applied to the organization interface. NSG channels the sky blue organizations in light of source and objective. 

Packet Capture Tool: It is utilized to record every one of the bundles got and sent from the VM, and you can then audit the organization traffic or analyze inconsistencies.

 Connection Troubleshoot Tool: It is used to test the TCP connection between the source and destination virtual machines and using FQDN, a URI or IP address user can specify the destination VM. 

VPN troubleshoot Tool: This instrument can determine issues to have virtual organization passage associations by running diagnostics on a virtual organization that returns wellbeing analysis. 

Here we will perceive how to analyze the Virtual Machine Network involving the Network watcher in Azure utilizing the Azure entryway: 

 Users must have a valid username and password.

Clients ought to have Azure Subscription to Diagnose assets utilizing Network Watcher. 

Given below are the steps using Azure Portal:  

 Step 1: Log in to Azure Portal using the following URL:

https://portal.azure.com/learn.docs.microsoft.com

 Step 2: From the Azure entryway landing page, select the +Create an asset.

 Step 3:  In the Azure Marketplace, select the Compute and then click on either Window Server 2016 Datacenter or Ubuntu Server.

 Step 4: Here, we have selected Ubuntu Server 108.04 and redirected the user to the Virtual Machine Creation page.

 Step 5:  Enter the Virtual Machine subtleties to arrange the essential boundaries like Subscription Name, VM name, Size, Region, Availability Option according to your memberships and prerequisite, and snap on the Review + Create.

Given below is the test network communication: 

Step 1: In the Azure Portal search box, enter Network Watcher and when it shows up in the outcome area, select something similar.

 Step 2:  Here, in the organization watchers, click on the drop-down rundown of the area segment and select the locale where you have made the VM.

 Step 3: Enable Network watcher in that specific region.

Given below shows the use of the IP flow verify tool: 

Step 1: Once Network Watch is enabled, select IP Stream to verify from the Network Diagnostic Tools section.

 Step 2: Select the subscription, resource group, VM name, protocol and enter the remote IP address to check its IP connection and click check:

After Some time, it will return an outcome that entrance is permitted due to the security rule as Allowed Internet Outbound.

 Step 3: You can take a stab at adding a few other Remote IPs and Check the association; it will return default Outbound Deny All due to the security rule. 

Step 4:  When the watcher is empowered, the client can choose from the Monitoring apparatus utilizing which the client can screen. Under the Monitoring area, every one of the apparatuses is recorded.

 Users can also use other diagnostic tools from the diagnostic department to diagnose resources. 

To investigate the availability issues in the single Virtual Machine organization, the client can utilize the IP Flow confirm devices to distinguish the issue as the client can determine remote and nearby ports. This device will likewise give the arrangement.

Network Watcher mechanizes the organization by observing and catching the parcel. Consequently, without signing into the VM, the screen and determination are robotized. 

Using the flow logs, you can get insight into your network traffic.

VPN availability issues analysis is simple as Network Watcher analyzes the VPN entryway and network issues. 

Taking everything into account, intricacies to analyze or screen the assets physically or from the specific locale are taken out utilizing the Network Watcher. As it is as of now incorporated into the Azure administrations, clients simply need to pay for what they are utilizing.

 Learn how to use Azure Network Watcher. Quick start, tutorials, and more show you how to gain insight into your Azure Virtual Network with tools like packet capture and NSG flows logs.

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