Forem: NITIN B

"🏃‍♂️" Command in Windows

NITIN B — Wed, 28 May 2025 06:31:03 +0000

Recently, I was wondering how the RUN in windows works, and i discovered how we can use it by customizing.

HOW ?

So lets see how it runs,

Actually run is a shortcut for running applications or services.
When we type the command or the keyword for the application the os will look into the system variables and finds the path where system32 is located (c:\windows\system32\) and finds the application and if it exists it runs the application. The system32 basically holds all the commands that can be used in the command prompt and the shortcut to run application.

Customized run

1. By using a executable file:
We have a sample.bat. This is a batch file containing,

@echo off
echo Hello, %USERNAME%!
echo This is a test script.

This sample.bat file which is stored in c:\user\desktop\scriptsor in any other folder you like. This path of the file should be pasted in the system variables PATH (Settings > about pc > advanced system settings > environment variables > system variables) by creating a new path paste the file location (c:\user\desktop\scripts)

This can be done with any executable files and not just batch files.

2.By using a shortcut:
We can run our customized command for applications by creating a shortcut in the system32 folder.

We can take the text.bat as a shortcut.
We can create a shortcut by right click > new > shortcut and find the file that you need to create a shortcut.

Now store the shortcut in the system32 folder (c:\windows\system32\).

After executing any of these methods you can now able to run the customized run by using the shortcut name or the file name.

"How the Internet Really Works — From Your ISP to Submarine Cables"🛜🕸️

NITIN B — Fri, 02 May 2025 10:07:36 +0000

List of topics:

Internet
How does internet works ?
ISP
Submarine cables
Flow of data

Internet

It is a group of network that communicate with each other in order to share data between them. They are interconnected with each other via physical cables. They are laid across the globe.

How does internet work ?

User must have an ip address in order to exist in a network.
Users pay ISP to get access to data across the globe. When a user requests for a data, it sends request to isp and the isp will redirect to the data centers.

ISP

ISP - Internet Service Provider
They are the provider of internet. They provide access to the internet via which people share data and request for data.

Note :Many people think that internet is something they provide, no!!. They only provide access to the internet. We people use ISP as a medium to access the data across the globe.

Submarine Cables:

Data from the servers are accessed by the people in the world using submarine cables. These cables are laid between different countries. Visit https://www.submarinecablemap.com to have a detailed view of the cables laid.
They are well protected from getting damaged, consisting of many layers of protection.

Flow of data:

ISP : Act as medium
User : Access the data

User don't have access to the data in the server until they have an IP.
In order to access the data from the server the user pays the ISP to access the data.
The ISP provide the data in return, to the user.

ISP's provide a specific amount of data to be transferred
For example, 1gb internet package means we can send or receive data of 1gb.

AWS Shield: Enhancing Cloud Security

NITIN B — Mon, 31 Mar 2025 17:28:50 +0000

In today’s digital age, where online threats are becoming more sophisticated and pervasive, ensuring the security of your cloud infrastructure is more crucial than ever. For businesses relying on AWS (Amazon Web Services), AWS Shield stands as a critical tool to protect against Distributed Denial-of-Service (DDoS) attacks and maintain the availability of your applications.

In this blog post, we'll explore what AWS Shield is, its types, and how it works to safeguard your AWS environment.

What is AWS Shield?
AWS Shield is a managed Distributed Denial-of-Service (DDoS) protection service offered by Amazon Web Services. It is designed to protect your AWS resources from external threats that attempt to overwhelm your application or services, such as DDoS attacks. These attacks are aimed at flooding a target with malicious traffic, rendering the service unavailable to legitimate users.

DDoS attacks can be highly disruptive, leading to downtime, data breaches, and reputational damage. AWS Shield provides advanced detection and mitigation capabilities to safeguard against these attacks, ensuring your business-critical applications remain secure and operational.

Types of AWS Shield
AWS Shield comes in two versions, each offering different levels of protection:

1. AWS Shield Standard
AWS Shield Standard is automatically included at no additional cost with all AWS services, providing fundamental protection against common and smaller-scale DDoS attacks. It uses a variety of detection techniques to identify and mitigate threats in real time, ensuring the availability of AWS services such as EC2, Elastic Load Balancer (ELB), and CloudFront.

Key features of AWS Shield Standard:

Protection against most common DDoS attacks.
24/7 access to the AWS DDoS Response Team (DRT) for emergencies.
Global threat intelligence to provide automatic and adaptive protection.
Protection across multiple layers of the AWS infrastructure.

While AWS Shield Standard provides robust protection, it is ideal for smaller-scale businesses or applications that don’t expect to face complex or large-scale DDoS attacks.

2. AWS Shield Advanced
AWS Shield Advanced takes protection to the next level with more sophisticated features and added support. This premium service offers enhanced DDoS detection, automatic mitigation of larger and more complex attacks, and additional support for application layer protections.

Key features of AWS Shield Advanced:

24/7 access to the DDoS Response Team (DRT): AWS experts provide round-the-clock assistance in the event of a large-scale attack.
Protection for non-AWS resources: Shield Advanced protects not only AWS services but also non-AWS resources like on-premise data centers.
Cost Protection: In case of a DDoS attack, Shield Advanced includes cost protection that covers the extra costs incurred due to the attack.
Advanced attack diagnostics and reporting: Provides detailed visibility into attack trends and specific attack vectors.
Web Application Firewall (WAF) Integration: Shield Advanced can integrate seamlessly with AWS WAF to further secure your web applications from vulnerabilities and threats.

AWS Shield Advanced is designed for large enterprises or businesses with high-risk applications that require comprehensive and proactive DDoS protection. The service provides robust security for applications with complex security needs.

AWS 3Tier Architecture

NITIN B — Mon, 31 Mar 2025 17:24:01 +0000

Create role for EC2:

Creating VPC:
VPC is created to have a virtual private cloud which is used to keep our cloud network separate from other cloud networks.

Creating Subnets:
Since the 3tier atchitecture has 3 sunets in 2 AZs so we need to create 6 subnets. In each AZ we need to create 2 private subnet and one public subnet.

Creating Internet Gateway:
In order to have communication with the internet we must have an internet gateway.

Creating NAT gateways:
NAT gateway is created in public subnets and it helps the private subnet to connect with the internet.

Creating Route Tables:
Route tables are tables that define the route between services.
This helps the data in a specified path.
Create Route tables and edit the routes accordingly and associate the subnets.

Creating security groups:

Creating subnet group for database:

creating database:

Creating EC2 instances:
Creating connection with DB:

Inserting data in the database:

Creating a bucket and uploading objects:

Downloading the s3 objects in the machine

Creating an Image

Creating a target group:

Creating internal load balancer:

Launch template creation:

Creating a Auto scaling group:

Creating a WebTier instance:

Uploading the files and accessing:
After creating webtier instance now we are accessing the web tier in the server

Creating target group for Internet facing load balancer

Creating a Internet facing load balancer

Creating launch template for WebTier

Creating Auto Scaling group for Webtier

AWS 101 Workshop

NITIN B — Mon, 31 Mar 2025 17:19:01 +0000

Creating VPC:

Creating security groups:

Role creation for EC2:

Web server creation:
Creating a web server in the private subnet.

Creating target group for load balancer

Creation of load balancer:

Creating a bucket and uploading

Creating Auto scaling group
Inorder to create auto scaling group we must create machine image and create a template.

Creating launch template:

created auto scaling group :

Output: