Skip to content
View gerarddiaz01's full-sized avatar

Block or report gerarddiaz01

Block user

Prevent this user from interacting with your repositories and sending you notifications. Learn more about blocking users.

You must be logged in to block users.

Content in all repositories owned by your account will be closed.
Maximum 250 characters. Please don’t include any personal information such as legal names or email addresses. Markdown is supported. This note will only be visible to you.
Report abuse

Contact GitHub support about this user’s behavior. Learn more about reporting abuse.

Report abuse
gerarddiaz01/README.md

Github banner

Gerard Diaz Gibert | Networking & Infrastructure

Cisco CCNA • Networks • Systems • Cybersecurity

LinkedIn Email


My Approach: Learn by Building

I am a CCNA-certified junior candidate developing practical skills in networking, systems administration, infrastructure operations, and cybersecurity.

My portfolio documents hands-on work in isolated virtualized labs: network configuration, firewall policies, Windows and Linux systems, Active Directory, traffic analysis, security hardening, and incident investigation.

I focus on understanding how systems communicate, troubleshooting issues methodically, documenting evidence, and validating changes. These projects demonstrate practical lab experience, not professional production-environment experience.

I am currently looking for a junior opportunity in Network Operations (NOC), network support, or IT infrastructure in Toulouse, France.


Technical Portfolio

Hands-on projects documenting network infrastructure, systems administration, security configuration, troubleshooting, and defensive security. Each repository contains practical work, technical evidence, or investigation notes from my labs.

Projects & Certifications What you'll find there (proven skills)
Iron4Software Project (Purple Team)
(Architecture, Red Team Audit & SOC Blue Team Defense)
• Build: deployed a vulnerable-by-design lab (Proxmox, pfSense, AD, Ubuntu).
• Red Team: executed the Cyber Kill Chain (webshell RCE, pivot, SMB brute force, ransomware).
• Blue Team (SIEM): post-incident investigation in Splunk (threat hunting, Event Logs 4624/4625).
• Hardening: flaw remediation, strict GPO, and securing the Splunk log pipeline (TLS between forwarders and indexer).
Stormshield CSNA (Certified)
(Certified Stormshield Network Administrator)
• Initial deployment: SNS appliance setup, network segmentation.
• Filtering & NAT: security policy creation and address translation.
• Hardening: securing the administration plane (SSH, WebUI).
• Monitoring: log management and tuning for the SOC.
SOC Analyst Training (Main Repo)
(Full documentation of my path)
• Windows Forensics: suspicious process analysis, Event Viewer, Sysmon.
• Linux Hardening: permissions (chmod/chown), log analysis (grep/awk).
• Network Analysis: manual protocol interaction (Telnet, FTP, HTTP), packet analysis.
• PowerShell/Bash: scripting for security task automation.

Technical Skills

Networking & Infrastructure

  • Networking: TCP/IP, IPv4, subnetting, routing, switching, DNS, DHCP, HTTP/S, SMB, SSH, RDP.
  • Network security: Cisco CCNA, Stormshield SNS, pfSense, firewall policies, filtering, NAT, network segmentation.
  • Systems: Windows 11, Windows Server 2019, Active Directory, Group Policy, Linux (Ubuntu, Kali).
  • Network troubleshooting: Wireshark, tcpdump, Nmap, packet analysis, connectivity investigation.

Monitoring & Cybersecurity

  • SIEM and log analysis: Splunk (SPL, Universal Forwarders), Elastic/Kibana, Wazuh.
  • Endpoint and logs: Sysmon, Windows Event Viewer, Linux authentication logs.
  • Security methodology: MITRE ATT&CK, Cyber Kill Chain, Sigma, OWASP Top 10.

Scripting

  • Python, Bash, PowerShell, SQL.

Additional Strengths

  • Communication: Several years of experience coordinating teams, managing priorities, and resolving problems in demanding operational environments.
  • Languages: Spanish and Catalan (native), French and English (C2), Italian (B1).
  • Approach: Methodical troubleshooting, clear documentation, and a willingness to investigate problems through to a verified resolution.

Open to junior opportunities in Network Operations (NOC), Network Support, and IT Infrastructure in Toulouse, France.

Pinned Loading

  1. SOC-Analyst-Cybersecurity-Training SOC-Analyst-Cybersecurity-Training Public

    Portfolio Analyste SOC : Fiches techniques, règles de détection, scripts d'automatisation et rapports de projets issus de ma formation en cybersécurité.

    2

  2. Stormshield-Network-Security-Labs Stormshield-Network-Security-Labs Public

    Déploiement, durcissement et administration d'infrastructures de sécurité avec Stormshield SNS. Laboratoires pratiques de certification CSNA (Filtrage, NAT, VPN, Logs SOC).

    2