$ whoami

Saurabh Dahiya

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# About Me

about_saurabh.sh

saurabh@kali:~$ cat about.txt


Hi, I'm Saurabh Dahiya — a passionate Cybersecurity Enthusiast dedicated to securing digital infrastructure and building resilient networks.


I specialize in Network Security, Linux Administration, and Infrastructure Hardening. My work revolves around designing secure network architectures, configuring enterprise-grade routing & switching solutions, and implementing robust security policies on Red Hat Linux systems.


Currently honing my skills in cybersecurity — from VLANs and tunneling protocols to firewall automation and SELinux policies. I believe in learning by building, and every project here reflects hands-on, real-world problem solving.


saurabh@kali:~$ _

5+

Projects

Networking

Cisco / Routing

Red Hat

Linux Admin

Security

Hardening / Audit

# Skills & Tools

Networking

VLANs / 802.1Q GRE Tunneling OSPF / RIP TCP/IP Subnetting Cisco IOS Packet Tracer

Linux

Red Hat / RHEL CentOS Kali Linux Bash Scripting SELinux Systemd Firewalld

Security

Firewall Config SELinux Policies SSH Hardening Log Auditing Nmap Wireshark IDS / IPS

Tools & Platforms

Git / GitHub VS Code VirtualBox Docker Basics GNS3 Vercel

# Projects

Encapsulation dot1Q

Encapsulation dot1Q

Configured IEEE 802.1Q VLAN trunking across multi-switch topology. Implemented inter-VLAN routing using router-on-a-stick method with sub-interfaces for seamless cross-VLAN communication.

802.1Q VLANs Cisco IOS Trunking
GRE Tunnel

GRE Tunnel

Built a site-to-site GRE (Generic Routing Encapsulation) tunnel connecting two remote networks over a simulated public IP backbone. Configured tunnel interfaces, static routes, and verified end-to-end connectivity.

GRE Tunneling Routing Cisco
Multi-Router Network

Multi-Router Network Connection

Designed and deployed a complex multi-router network topology with OSPF dynamic routing. Ensured full mesh connectivity, configured loopback interfaces, and performed route verification across multiple hops.

OSPF Multi-Router Subnetting Packet Tracer
RHEL Firewall Automation

RHEL Firewall Automation

Developed Bash scripts to automate firewalld zone configuration, service management, and port rules on RHEL 9. Includes automated zone assignment, rich rules, and logging for security audit compliance.

RHEL 9 Firewalld Bash Automation
SELinux Hardening Toolkit

SELinux Hardening Toolkit

Created a comprehensive SELinux hardening toolkit for RHEL servers. Automates context labeling, boolean toggling, custom policy modules, and audit log analysis to enforce mandatory access control.

SELinux RHEL Security Bash

# Contact

contact.sh

saurabh@kali:~$ cat contact_info.json


{
  "name": "Saurabh Dahiya",
  "email": "sddahiya1609@gmail.com",
  "phone": "+91 8295578997",
  "linkedin": "linkedin.com/in/saurabh-dahiya-679370435",
  "github": "github.com/sddahiya"
}

Email

sddahiya1609@gmail.com

Phone

+91 8295578997

LinkedIn

Connect with me

GitHub

View my profile