Skills

Skills organized by real technical use, not by buzzwords.

The skill page is intentionally grouped by families. Each group connects to projects or field exposure: network design, service setup, troubleshooting, security visibility, telecom labs, and reusable documentation.

5 focus points

Networking and infrastructure

Designing, configuring and explaining network environments with segmentation, routing, redundancy and service access in mind.

  • VLANs, trunking and STP for segmented switching labs
  • OSPF, EIGRP and routing logic in GNS3 / Cisco-style environments
  • HSRP and redundancy thinking for service continuity
  • ACLs, network filtering and traffic path validation
5 focus points

Systems and services

Practical work around Linux/Windows environments, services, containers and dependencies that must be reproducible and understandable.

  • Linux command line, service checks, logs and configuration files
  • Windows Server and Active Directory concepts used in infrastructure projects
  • Docker and Docker Compose for lab deployment and reproducibility
  • PostgreSQL / MySQL exposure through IAM, ChatApp and service-oriented projects
5 focus points

Cybersecurity and monitoring

Security practice focused on visibility, validation and evidence rather than vague claims.

  • Wireshark captures used to compare clear-text and encrypted traffic
  • Caldera/Sandcat and MITRE ATT&CK-oriented lab work
  • ELK / log analysis direction for blue-team evidence
  • SSL/TLS certificates and invalid-certificate test scenarios
5 focus points

Telecom, SDR and private 5G

Telecom-oriented experimentation connecting radio, signal paths, private-network labs and technical reporting.

  • OpenAirInterface private 5G lab direction with Core + gNodeB + UE logic
  • RFSim, SDR-related configuration paths and attachment/session troubleshooting
  • USRP / SDR exposure through private 5G and telecom labs
  • NOAA SDR reception workflow with SDR++, SatDump, Gpredict and signal constraints
5 focus points

Development and automation

Small development and scripting work used to support labs, interfaces, tools and project structure.

  • Java socket application with SSL/TLS and MySQL persistence
  • Python/Bash scripting mindset for repeatable technical steps
  • Basic web/interface work through portfolio, Flask/PHP-style project exposure and personal products
  • Git/GitHub workflow for publishing and organizing project work
5 focus points

Support, documentation and communication

A recurring strength: turning technical work into something understandable, testable and reusable.

  • Step-by-step technical documentation with commands and screenshots
  • Troubleshooting notes that separate observations from assumptions
  • Evidence-oriented project reports and validation sections
  • Clear handoff logic for teammates, tutors and future reviewers

Honest skill positioning

This page does not claim mastery of everything. It shows the areas I have practiced, the tools I can explain, and the subjects I am actively strengthening through projects.

See these skills applied

The projects page shows the concrete environments where these skills appear: network infrastructure, SSL/TLS chat, SDR NOAA, Caldera/ELK, IAM and private 5G.

Crafted in France. © 2026 Kopethan ARUDSHELVAN (Kopy).