Pedro Pehrson

ZTNA Environment Support: Monitoring and supporting the Siemens Global ZTNA infrastructure, utilizing tools like Wireshark, TCPdump, PRTG, and ZDX for troubleshooting network and security issues. Advanced Networking Expertise: Configuring and tshoot PAC files; proficient in LAN, WAN, DHCP, DNS and Zscaler platform management (log analysis, whitelisting/blacklisting, sandboxing, and web filtering). Cloud Connector: Deploying and supporting Zscaler Cloud Connector using AWS , CloudFormation, and Terraform.

Network and Systems Administration: Managed Windows and Linux systems, designed and implemented local networks, site-to-site VPNs, and optimized resource usage. Firewall and Security Configuration: Deployed pfSense firewall, IDS with Snort, reverse proxies and proxies. Virtualization: Citrix XenServer with failover/load balancing and backup using Robocopy + AWS Glacier Cloud Migration: Migration of local servers to AWS Monitoring Tools: Cacti and Grafana

Network Design & VPNs: Designed local networks for 8 offices environments and implemented site-to-site VPNs. VoIP & Communication Systems: Configured Cisco Unified Communications (500 Series SMB) for telephony services, optimizing call routing using the best route (lowest price)+(QoS with low jitter). Security and Monitoring: Deployed pfSense firewalls with IDS (Snort), and utilized Nagios for resource and link monitoring. Softphone Integration: Integrated softphones for remote work.

Penetration Testing & Vulnerability Assessment: Conducted vulnerability analysis, penetration testing, and exploitation of network device vulnerabilities, focusing on outdated firmware and backdoor services. Security Enhancements: Hardened Windows servers, network devices to improve security posture, and documentation of all tests with the best solution. Security Protocol Management: Managed VPNs and perimeter networks, ensuring secure communication protocols across systems.