Freelancer profile translated to English.
Back to original languageAbout Juan Luis
In my career as a System and Network Administrator, I have specialized in infrastructures for SMEs:firewalls, VPN, servers, virtualization, and corporate email.I work daily withSophos/OPNsense, Proxmox/VMware, and Linux/Windows environments**, designing and maintaining **secure, stable, and documentednetworks.
Services I perform most frequently:
• Configuration, hardening, and auditing of firewalls (**Sophos, OPNsense**; experience with **Fortigate/Mikrotik**)
• VPN design and deployment (**IPSec, SSL VPN, site-to-site, and remote access**)
• Administration ofLinux/Windowsservers and network services (**AD, DNS, DHCP**)
• Virtualization with **Proxmox/VMware**, consolidation, and performance improvement
• Monitoring and alerts withZabbix +automation (**PowerShell, Bash**)
• Recurring support for SMEs and incident resolution fornetwork and security
I usually come in when "nothing works" and stay to ensure it doesn't happen again: I standardize, document, monitor, and leave the infrastructure ready to grow without surprises.
Spanish
Native or bilingual
English
Conversational
Can work on-site
Madrid (up to 50km), Málaga (up to 50km), Barcelona (up to 50km), Zaragoza (up to 50km), Bilbao (up to 50km)
Experience
- ARMARIOS ELÉCTRICOS, S.A.
On Malt
Azure App Services Connection to Orange M2M Network — Site-to-Site IPSec VPNTELECOMMUNICATIONSJune 2026 - June 2026Design, deployment, and validation of a site-to-site IPSec VPN in Microsoft Azure to securely interconnect an industrial company's cloud applications (12 App Services) with its telecommunications operator's private M2M/IoT network, allowing the company's software to communicate with its field equipment via the operator's mobile network.- Design of the network architecture in Azure: virtual network, subnets, App Services integration via VNet Integration, and zone-redundant VPN gateway.
- Configuration of the IPSec/IKEv2 tunnel with custom encryption policy (AES-256, SHA-256, DH/PFS Group 14), coordinating parameters with the operator's team.
- Resolution of an interoperability issue between Azure's route-based gateway and the operator's policy-based endpoint (traffic selector alignment), which was preventing the tunnel from establishing.
- End-to-end validation of connectivity with the M2M network and monitoring of link stability with real metrics before closing.
- Delivery of "as-built" technical documentation for the entire installation.
# Tunnel operational and validated by the client one day before the scheduled deadline, with confirmed connectivity from their own applications. Project closed with full client satisfaction and continuity for future work. - Alpex DigitalFirewall InterventionNovember 2025 - November 2025Remote intervention on a client's perimeter firewall to diagnose and resolve a connectivity issue. I analyzed the configuration of rules and active sessions, applied the necessary adjustments, and validated the correct functioning with the client, leaving documented recommendations for improvement and security best practices.
- Grupo ALSystem, Network, and Cybersecurity AdministratorFebruary 2020 - Today (6 years and 6 months)Malaga, SpainAdministration:• Exchange, Office 365, and Azure environments.• Windows Server (Domain Controllers, DNS)• Sophos, Cisco, Mikrotik Firewalls.• Linux, Windows environments.• Data Processing Centers.• Virtualized systems (vmware esxi)• Access and control systems Dahua.
Reviews
A
Antonio
IT Project Manager - ARMARIOS ELÉCTRICOS, S.A.
Reviewed on 6/16/2026
Excellent attitude, availability, and technical knowledge, more than sufficient to undertake the project. Communication has been clear and fluid, and upon completion, I have received a complete "As-Built" document. Without a doubt, I will count on him again in the future.
Roberto
Alpex Digital
Reviewed on 11/14/2025
Excellent professional. Solved the incident quickly and effectively, with clear communication and impeccable treatment. Highly recommended.
Recommendations
Be the first to recommend Juan Luis
Help this freelancer shine by sharing your experience working together.
These freelancer profiles also match your criteria
Agatha Frydrych
Backend Java Software Engineer
4.7
(3)
2
Baptiste Duhen
Fullstack developer
4.6
(4)
5
Amed Hamou
Senior Lead Developer
4
(2)
7
Audrey Champion
Web developer
4.3
(3)
4