[+] recon
Network Scanning
Host discovery, port sweeps, service banners, and surface-area mapping in controlled labs.
nmap · masscan · arp-scan
SECURE_SHELL // PORTFOLIO
Break it. Defend it. Document it.
Cybersecurity trainee learning how systems are attacked — and how to harden them. Vulnerability assessment, service enumeration, packet analysis, and case-study documentation, all in safe, authorized lab environments.
[ RED TEAM ] Offensive Recon
[ BLUE TEAM ] Defensive Posture
$ whoami md_jubayer_islam $ cat ./profile.json { "alias": "cyber_trainee", "location": "Dhaka, BD", "focus": "VA, recon, packet_analysis", "toolkit": ["nmap", "hydra", "wireshark", "metasploit"], "status": "available_for_internship" } $ sudo ./engage --safe-mode [+] authorized lab environment loaded [+] ethics_check ............ PASS [+] documentation_layer ..... ACTIVE $ _
8+
Security Tools
3+
Lab Projects
5+
Security Areas
100%
Authorized Practice
// security_skills
What I'm practicing.
Hands-on lab work, not theory dumps.
[+] enum
Service Enumeration
Version fingerprinting and understanding how outdated services expose real risk.
nmap -sV · enum4linux
[+] auth
Password Security
Credential strength, authentication testing concepts, and prevention with rate limiting & MFA.
hydra · john · hashcat
[+] traffic
Packet Analysis
Reading protocol-level traffic, spotting suspicious patterns, and tracing handshakes.
wireshark · tcpdump · tshark
[+] va
Vulnerability Assessment
Scanning, triaging findings, and recommending mitigations with clear severity context.
nessus · openvas · nikto
[+] docs
Security Documentation
Turning lab work into case studies: objective → process → findings → remediation.
markdown · screenshots · timelines
// toolkit
$ which <tool>
nmap
hydra
wireshark
metasploit
nessus
openvas
nikto
vmware
kali linux
linux cli
burp suite
john the ripper
// kill_chain
How my cybersecurity journey is growing.
From curiosity to documented case studies — step by step.
01
Curiosity
How do systems get owned, and how do defenders stay ahead? That question started everything.
→
02
Virtual Labs
Built isolated VMware environments with attacker + target machines. No prod systems, ever.
→
03
Security Tools
Hands-on practice with nmap, hydra, wireshark, nessus/openvas, metasploit, and nikto.
→
04
Documentation
Practical lab work, written up as case studies with findings, mitigations, and lessons learned.
// case_studies
Cybersecurity projects.
Lab-based, authorized, and fully documented.
● ACTIVE
Hydra Password Auditing Lab
Controlled lab on weak credential risk, authentication testing concepts, and defensive best practices for password security.
$ open case-study →
★ FEATURED
ProFTPD Exploitation Lab
End-to-end case study: service enumeration, vulnerable FTP analysis, controlled exploitation concepts, and mitigation.
$ open case-study →
… QUEUED
DVWA Web Security Lab
Upcoming case study for web application security testing, OWASP-style vulnerability classes, and remediation notes.
$ status pending →