eth0 — Soluções Online

Building
incredible systems.

Linux consulting, systems development and open source products for teams that need reliable solutions.

01 Linux Infrastructure
02 Systems Development
03 Web Development
04 Network & Security

Expertise.

From kernel to final product.

01

Linux Infrastructure

Server administration, hardening, virtualization, containers, and migrations. 20+ years on production Linux systems.

LPIC-2KVM / ProxmoxDocker / LXCAnsible
02

Systems Development

Robust backends and web applications built with Python and Django. From architecture to production deployment.

PythonDjangoREST APIPostgreSQL
03

Web Development

Modern websites and web applications, landing pages, and custom solutions for your business.

DjangoHTML / CSSJavaScript
04

Network & Security

VPN setup, firewall configuration, MikroTik routing, and network security consulting.

MikroTikWireGuardiptablesVPN / VoIP

eth0 products.

From Open Source to SaaS.

Projeto Descrição Status

What it is

A complete WireGuard VPN management solution via web interface. Covers the full cycle — interface creation, peer management, traffic monitoring, firewall, DNS, scheduling, and API automation — all in a single panel, self-hosted and open source.

Launched on February 17, 2024, the project quickly gained an active community of sysadmins and networking enthusiasts worldwide.


WireGuard VPN Management Platform

Manage multiple WireGuard instances, peers, firewall, DNS, and automation from a single web panel — self-hosted, no third-party dependency.


Zero Trust Gateway

Expose internal applications to the internet securely — no open ports, no client-side VPN. The gateway intercepts every request and requires authentication before any access is granted: TOTP, IP ACL, or Altcha PoW challenge. The real application is never directly exposed.

Ideal for exposing internal dashboards, team tools, and self-hosted services with a strong authentication layer in front.


Key features

  • Multiple WireGuard instances in a single panel
  • Peer management with real-time traffic graphs
  • Per-instance firewall with iptables rules and port forwarding
  • DNS resolver with category-based blacklists (ads, malware, tracking, adult content)
  • Invite links with QR code and configurable expiry
  • Peer scheduling — automatically enable/disable by time window
  • Reusable routing templates
  • REST API v2 for external automation
  • Multi-user with role-based permissions
  • Native amd64 and arm64 images

Tech stack

Python / Django Docker WireGuard Caddy (auto HTTPS) dnsmasq RRDtool

Free and open source. Nothing leaves your server.

What it is

routerfleet is an open source solution for centralized management of router fleets and network equipment, initially focused on MikroTik devices. It solves a real problem for network administrators: maintaining backup control, tracking configuration changes, and managing multiple devices without losing history.


Key features

  • Centralized backup of multiple routers in a single panel
  • Configuration diff — identify what changed between backups
  • Multiple backup profiles with distinct retention policies
  • Automatic backup scheduling per device
  • User access control with role-based permissions
  • Integration with wireguard_webadmin for VPN management
  • Docker Compose deployment — PostgreSQL or SQLite

Tech stack

Python / Django JavaScript Docker MikroTik PostgreSQL

The project

hotelflow was a hotel management SaaS startup that I founded and fully developed in Python/Django. The system became an essential product for hundreds of hotels across Brazil, covering everything from reservation control to complete operational management.

Developed integrations with the leading channel manager services in Brazil — Hsystem, Omnibees, and Bukly — connecting hotelflow to the major online reservation distribution platforms.

I led the project from conception to a successful sale to an external group in July 2023 — a complete eight-year cycle, from zero to exit.


Responsibilities

  • Full platform architecture and development (Python/Django)
  • Integration with Brazil’s leading channel managers (Hsystem, Omnibees, Bukly)
  • Product definition, roadmap, and feature prioritization
  • Operations management, support, and customer relationships
  • Technical team and support staff leadership
  • Negotiation and completion of the sale process

Tech stack

Python / Django PostgreSQL Linux Docker JavaScript SaaS / B2B

Period

November 2015 to July 2023 — Rio Grande, RS, Brazil

Project closed with sale. hotelflow continues operating under new management.

What it is

Hotspot Beacon is a hotspot management platform with a primary focus on white-label for software providers. The system offers integrations with external systems, allowing other vendors to embed hotspot management functionality into their own products.


Features

  • Complete hotspot management
  • White-label capabilities for resellers
  • External system integrations via API
  • User access control and authentication

Tech stack

Python / Django Linux SaaS White-label

Contact

Have a project in mind?

Available for consulting and freelance projects in Linux infrastructure, systems development, and web development.