Marvel Level-3 Report

30 / 10 / 2025

Task 1: Terraform

Terraform is an Infrastructure as Code(IaC) tool, it lets us mange infrastructure using Configuration files rather then using Graphic UI on several platforms. This task was to create,manage and destroy infrastructure in AWS using Terraform.By creating terraform files using HCL and running them using CLI, i was able to create and delete infrastructure in AWS.

Task 2: SSH

SSH- Secure Shell is used to connect to a server over the network.It is safe method to connect to an external server on the local device. This task was to create a server and use ssh to find all th key files concerned with that server. Then copy all the files from there to a new server. I searched for all private keys,public keys and authorized keys in the first server and stored them in a file, then I ssh into other server and transferred the file into that.

Task 3: Hashing

Hashing is a method of converting an input(int or string of char) into another string of values obtained using a Hash function. It prevents easy hacking of confidential infomation becoz a hashed string cannot be reversed into orginal data. In this task I used the hashlib python library to hash the passwords, the hashed passwords are stored with usernames in a dictionary.During login, the password verification is easily done by applying the same hash function to the input in password field. I have used SHA-256 hash function.

Task 4: Jenkins

Jenkins is a tool that automates the repetitive processes in software development. In this task, I created and automated a simple Rock–Paper–Scissors game using Jenkins. The Java program reads the user’s choice from an input.txt file, generates a random computer choice, compares the two, and displays the result. Using a Jenkins pipeline, the program is automated. It is complied using javac and executed with java.

Task 5: Docker

Docker is a tool that helps you run applications in small, isolated environments called containers. A container is like a small, isolated box that holds everything an application needs to run like its code, libraries, settings, and dependencies. Container image as a single package that contains everything needed to run a process. In this task, by following the resourced guide:

• Installed docker
• Ran container
• Cloned and developed a project from Github(TODO APP)
• Built a repository. Built and pushed a container image.

Task 6: NMap

In this task, I explored how Nmap (Network Mapper) works for network discovery.I scanned a host to check for open posts, running services and operating systems. nmap scanme.nmap.org - to find open ports and services. nmap -sV scanme.nmap.org - to detct services nmap -A scanme.nmap.org -oN results.txt - to scan and save results to a file.

Task 7: Wireshark

Wireshark is a Network packet analyzer tool. In this task , I was able to learn how this tool works. Firstly I captured the live network (Wi-Fi) in which I was able to see the all those live packets across protocols liake TCP,IPv4 etc. I also applied filter like Retransmissions and duplicate acknowledgement. I also viewed Statistics options like Protocol hierarcy and I/O Graphs.This task helped me understand Wi-Fi packet capture, protocol layers, and network troubleshooting.

Task 8: AWS Lambda

In this task I deployed the Chat app using AWS Lambda, the Function as a service by Amazon web services. The backend code was deployed as the Lambda function For HTTP request handling I created a Websocket gateway under AWS API Gateway services. Whenever a user sends a chat message, the Lambda function is activated by AWS Gateway, which processes the request and stores then in AWS DynamoDB tables created.This task was to use of AWS services to run Event-driven cloud architecture which helps deploy applictions without managing servers.

Task 9: Dockerize

In this task I Dockerized the web app created earlier. I created a dockerfile in my web app folder itself , which helps in creating a an Image.It shall copy the backend files, installs dependencies,etc. An image stores all these backend requirements. Then I created an image called mongo to integrate the MongoDB database. Finally I created a Bridge network to help communicate between containers.

Task 10: WebScraping and Automation

This task was to use selenium to automatically browse through a flight booking website called Expedia. Selenium is browser automation tool which is able to open the web page , enter the source and destination cities and dates in the respective input spaces and also clicks buttons. I also installed suitable CromeDriver which helps python code open chrome browsers. As selenium was blocked to open expedia directly through normal chromedriver , i had to use an undetected chromedriver. I had to include wait condition in the selenium code so as to allow the automatic loading of Expedia, a dynamic website. Finally for sending an email with the obtained price details, I used the python's SMTP. But an automatic email sending using code is blocked for safety purposes so I had to get the App password from my gmail.