Khalif AL Mahmud - DEV Community

Khalif AL Mahmud

Aug 8

Cracking the Code: A Hands-On Journey Through Cryptography, Hash Cracking, and Post-Quantum Security

#cybersecurity #cryptography #hashcat #ethicalhacking

7 min read

Khalif AL Mahmud

Aug 5

What My Own Wi-Fi Traffic Looked Like Under Wireshark (And Why 88% of It Wasn't Even TLS)

#networking #wireshark #cybersecurity

5 min read

Khalif AL Mahmud

Jul 26

Building My First LAN in Cisco Packet Tracer: Connecting 4 PCs Through a Switch

#networking #cisco

5 min read

Khalif AL Mahmud

Jul 17

Linux, Networking, Scripting, and AI: What Every Beginner Pentester Should Know

#linux #networking #scripting

4 min read

Khalif AL Mahmud

Jul 17

How Stuxnet Broke Into an "Offline" Nuclear Facility — Without Ever Touching the Internet

#stuxnet #malware

3 min read

Khalif AL Mahmud

Jul 16

Dark Web vs Dark Net vs TOR — Untangling Three Terms People Use Interchangeably

#cybersecurity #infosec #tor

3 min read

Khalif AL Mahmud

Jul 16

What Is a Watering Hole Attack? (And Why It's Sneakier Than Most Cyber Attacks)

#cybersecurity #infosec

2 min read

Khalif AL Mahmud

Jul 16

Non-Repudiation — Why You Can't Just Say "I Didn't Do That" Anymore

#cybersecurity #nonrepudiation

2 min read

Khalif AL Mahmud

Jul 16

Accountability vs Audit — Knowing Who Did What, and Proving It

#cybersecurity #audit #accountability

2 min read

Khalif AL Mahmud

Jul 16

Authentication vs Authorization — "Who Are You?" vs "What Can You Do?"

#cybersecurity #authentication #authorization #infosec

2 min read

Khalif AL Mahmud

Jul 16

Verification vs Validation — Two Questions Every Secure System Needs to Answer

#cybersecurity #verification #infosec #validation

2 min read

Khalif AL Mahmud

Jul 16

FIPS vs NIST — Two Acronyms You'll Keep Running Into in Cybersecurity

#cybersecurity #nist #fips #compliance

2 min read

Khalif AL Mahmud

Jul 16

What Exactly Is a DMZ, and Why Does Every Serious Network Have One?

#cybersecurity #networking

3 min read

Khalif AL Mahmud

Jul 4

AI in Cybersecurity: Why Artificial Intelligence Is Both Our Strongest Defense and a Growing Threat

#cybersecurity #ai #roe #hacktoberfest

5

7 min read

Khalif AL Mahmud

Jun 30

How Can We Secure Data at Every Stage of the Data Lifecycle?

#datalifecycle #dar #dim #diu

5

2 min read

Khalif AL Mahmud

Jun 30

Is Linux Secure? Is Windows Secure? Which Operating System is More Secure?

#linux #windows #computersecuritysystem

5

2 min read

Khalif AL Mahmud

Jun 26

Malware Unpacking & Anti-Analysis Bypass: A Deep Dive into Real-World Techniques

#malwareanalysis #reverseengineering #cybersecurity #antidebug

13 min read

Khalif AL Mahmud

Jun 26

From Packed Binary to Readable Code: A Hands-On Walkthrough of Unpacking, Shellcode Analysis, and Memory Forensics

#malwareanalysis #cybersecurity

5

18 min read

Khalif AL Mahmud

Jun 26

A Deep Dive into Malware Analysis: Deobfuscation, Shellcode Extraction, and Document Forensics

#malwareanalysis

15 min read

Khalif AL Mahmud

Jun 26

Reverse Engineering a Windows Keylogger with IDA Pro: Assembly-Level Deep Dive

#reverseengineering #malware #assembly #security

7 min read

Khalif AL Mahmud

Jun 26

Reverse Engineering a Live Specimen: A Practical Walkthrough of brbbot.exe (Static, Behavioral, Network, and C2 Analysis)

#malwareanalysis #reverseengineering #cybersecurity #infosec

6 min read

Khalif AL Mahmud

Jun 26

Understanding Malware Analysis: Types, Methodology, and Lab Setup Fundamentals

#malwareanalysis #cybersecurity

5

7 min read

Khalif AL Mahmud

Jun 26

Exploiting Metasploitable2 with Metasploit: VSFTPD, Samba, and More

#cybersecurity #metasploitable2 #linux #eathicalhacking

8 min read

Khalif AL Mahmud

Jun 26

Network Enumeration in Practice: Nmap, enum4linux, snmpwalk, and GUI Tools

#cybersecurity #networking #linux #ethicalhacking

8 min read

Khalif AL Mahmud

Jun 25

I Scanned a Vulnerable VM with Every Nmap Mode — Here Is What Each One Revealed

#nmap #ethicalhacking #networking #penetrationtesting

8 min read

Khalif AL Mahmud

Jun 25

Passive Reconnaissance on google.com — What I Found Using Shodan, WHOIS, and DNS Tools

#infosec #networking #cybersecurity #ethicalhacking

5

10 min read

Khalif AL Mahmud

Jun 25

Before You Hack Anything — How Penetration Testers Define Scope and Rules of Engagement

#cybersecurity #ethicalhacking #penetrationtesting

9 min read

Khalif AL Mahmud

Jun 25

How I Used Wireshark to Dissect a Real TCP Connection — From Handshake to Teardown

#packetanalysis #wireshark #tcp #cybersecurity

1

7 min read

Khalif AL Mahmud

Jun 18

Building a Personal Cybersecurity Lab: Kali Linux + Metasploitable2 on VirtualBox

#cybersecurity #linux #virtualbox #metasploitable2

5

5 min read

Khalif AL Mahmud

Jun 13

Python Cryptography Basics: Building ASCII & Alphabet Tables from Scratch

#python #cryptography

5

5 min read

Khalif AL Mahmud

Jun 13

Lab Task 14 - How I Built a Real-Time Admin Login Attack Detector Using Snort3 and Apache on Ubuntu

#networking #snort #linux #ubuntu

6

7

6 min read

Khalif AL Mahmud

Jun 13

Lab Task 13 - How I Built a Network Intrusion Detection System with Snort 3 on Ubuntu — and Caught Every Scan

#snort #ids #nmap #cybersecurity

5

8 min read

Khalif AL Mahmud

Jun 13

Lab 12 - Telnet and SSH ( I Captured My Own Password in Wireshark — Here's What Telnet Taught Me About Network Security )

#networking #cybersecurity #ssh #telnet

5

10 min read

Khalif AL Mahmud

Jun 13

Lab Task 11 – Monitoring HTTP Traffic with Httpry on Kali Linux — Passive Capture, Live Monitoring & CLF Conversion

#httpry #kalilinux #livemonitoring #passivecapture

5

7 min read

Khalif AL Mahmud

Jun 13

Lab Task 10 -Packet Capture on Kali Linux: Daemonlogger Setup, Traffic Generation & Wireshark Analysis

#wireshark #kalilinux #networking #packetcapture

5

7 min read

Khalif AL Mahmud

Jun 12

Lab 9 - Building a Cisco ASA Firewall Lab in GNS3: Inside, DMZ, and Outside Zones with Extended ACLs

#firewall #gns3 #networking #ciscoasa

5

9 min read

Khalif AL Mahmud

Jun 12

Lab Task 8 - How I Built a Multi-VLAN Network with Inter-VLAN Routing in GNS3 Using a Layer 3 Switch

#networking #gns3 #vlan #layer3switch

5

7 min read

Khalif AL Mahmud

Jun 11

Lab Task 7 - How I Used Wireshark to Capture ICMP and DHCP Traffic in a GNS3 Network

#wireshark #dhcp #gns3 #networking

5

7 min read

Khalif AL Mahmud

Jun 11

Lab Task 6 - How I Built a Multi-Router DHCP Network in GNS3 with RIP Routing

#networking #gns3 #dhcp #rip

5

7 min read

Khalif AL Mahmud

Jun 11

Lab Task 5 - Subnetting in GNS3: Building a Multi-Subnet Network with OSPF Routing from Scratch

#networking #subnetting #gns3 #ospf

5

8 min read

Khalif AL Mahmud

Jun 11

Lab Task 4 - How I Built a Multi-Router Network Using RIP and OSPF Dynamic Routing in GNS3

#networking #rip #dynamicrouting #gns3

5

8 min read

Khalif AL Mahmud

Jun 11

Lab Task 3 - Static Routing with Backup Links: How Routers Automatically Recover from Failures

#networking #cisco #gns3 #staticrouting

5

9 min read

Khalif AL Mahmud

Jun 11

Lab Task 2 - How I Built a Multi-Router Static Routing Network from Scratch Using GNS-3

#networking #gns3 #staticrouting

5

7 min read

Khalif AL Mahmud

Jun 10

Lab Task 1 - How I Connected Two Isolated Networks Using Static Routing in GNS3

#networking #gns3 #cisco

5

4 min read

Khalif AL Mahmud

Jan 19 '25

Step-by-Step Guide to Building a Robust CI/CD Pipeline for Java Projects on AWS Linux with Git, Jenkins, Maven, & Tomcat

#devops #aws #cicd #jenkins

8

11 min read

Khalif AL Mahmud

Jan 14 '25

Integrating Maven with Jenkins: A Step-by-Step Guide

#devops #jenkins

5

3 min read

Khalif AL Mahmud

Jan 12 '25

Can’t access username or password, forgot these credentials after installing Jenkins

#devops #jenkins

6

3 min read

Khalif AL Mahmud

Jan 11 '25

Streamlining CI/CD: A Complete Guide to Installing Jenkins on AWS EC2

#devops #jenkins #aws

8

3 min read

Khalif AL Mahmud

Jan 9 '25

Resolving SSH Authentication Errors on Mac: Using a .pem File

#devops #pem

5

2 min read

Khalif AL Mahmud

Jan 2 '25

An Introduction to DevOps Build Tools for Different Programming Languages

#devops #buildtools

6

1 min read

Khalif AL Mahmud

Nov 8 '24

Essential JavaScript Array Methods Every Developer Should Know

#javascript

5

3 min read

Khalif AL Mahmud

Oct 27 '24

Show the Last Commit of a GitHub Repository in Terminal Prompt

#terminal #github

5

2 min read

Khalif AL Mahmud

Oct 22 '24

Simplifying Data Fetching in React with Axios and React Query in Next.js

#axios #nextjs

7

3 min read

Khalif AL Mahmud

Oct 22 '24

A Comprehensive Guide with XHR, Fetch API, Axios and jQuery AJAX

#xhr #axios #jquery #ajax

6

5 min read

Khalif AL Mahmud

Oct 22 '24

Setting Up Node.js and Yarn on Debian-based Distributions

#node #npm #debian

5

2 min read

Khalif AL Mahmud

Oct 22 '24

Shopify vs. WordPress: Key Features and Functionalities

#shopify #wordpress

5

2

3 min read

Khalif AL Mahmud

Oct 22 '24

Set Up Local Shopify Theme Development with GitHub Integration

#shopify #github

6

1

3 min read

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