How to set up a private cloud based security system using the containers

This guide walks you through deploying the SIEM stack in a private cloud—ideal for shelters or advocacy organisations that operate across multiple locations. You’ll get remote access, centralised monitoring, and the same surveillance detection tools—without surrendering data control to big tech.

What you’ll need

A secure cloud server

  • Provider examples: Hetzner, Netcup, 1984 Hosting (avoid AWS/Azure/Google unless legally required)

  • Recommended specs:

    • 8+ GB RAM
    • 4 CPU cores
    • 100 GB SSD
    • Ubuntu 22.04 LTS

  • Hardened with:

    • Fail2ban
    • Unattended upgrades
    • UFW (firewall)

VPN access

  • All shelter locations must use secure VPN tunnels to reach the cloud server.
  • WireGuard or OpenVPN are both fine.

Survivor devices

As in the in-shelter version: Windows, macOS, Android (rooted preferred), iOS (jailbroken or backups)

Optional: PiRogue toolkit

Use in clinics or satellite offices for local device scans.

Step-by-step setup

Harden your cloud server

# Update server
sudo apt update && sudo apt upgrade -y

# Install basic security
sudo apt install fail2ban ufw unattended-upgrades -y
sudo ufw allow ssh
sudo ufw enable

Install SIEM stack

Same as on-prem:

# Add Wazuh repo
curl -s https://packages.wazuh.com/key/GPG-KEY-WAZUH | sudo gpg --dearmor -o /usr/share/keyrings/wazuh.gpg
echo "deb [signed-by=/usr/share/keyrings/wazuh.gpg] https://packages.wazuh.com/4.x/apt/ stable main" | sudo tee /etc/apt/sources.list.d/wazuh.list
sudo apt update

# Install components
sudo apt install -y wazuh-manager wazuh-api elasticsearch kibana

# Start services
sudo systemctl enable --now wazuh-manager elasticsearch kibana

Enable secure access

Set up VPN (WireGuard example)

sudo apt install wireguard -y
# (Generate keys, share with each site. Use port 51820.)

Access the Wazuh dashboard

  • Open Kibana at https://your-cloud-ip:5601
  • Configure HTTPS with Let’s Encrypt if possible

Connect remote shelter devices

Windows/macOS

  • Download and install agents at remote shelters
  • Configure agent to connect via VPN to your cloud IP

Android (rooted via Termux)

pkg update && pkg install curl git
curl -s https://your-cloud-ip/setup_android.sh | bash

For Android (non-rooted)

Non-rooted Android phones are limited in what can be monitored directly, but you can still extract useful information manually and upload it securely to your SIEM server.

Option 1: Use ADB (Android Debug Bridge)

This method requires physical access to the phone and a computer with ADB installed. Step-by-step:

  1. Prepare your computer: Install ADB:
sudo apt install android-tools-adb

  1. Enable USB debugging on the Android device

    • Go to Settings > About phone
    • Tap Build number 7 times to enable Developer Options
    • Go to Settings > Developer options
    • Enable USB debugging

  2. Connect the phone via USB: Trust the computer if prompted on the phone.

  3. Collect logs and data: On your terminal:

adb devices
adb logcat -d > android_logcat.txt
adb shell dumpsys > android_dumpsys.txt
adb shell pm list packages -f > installed_packages.txt
  1. Securely upload logs to the cloud server: Assuming you have SSH set up on your cloud server:
scp android_*.txt youruser@your-siem.cloud:/opt/forensics/android_logs/
  1. (Optional) Encrypt before upload
gpg -c android_logcat.txt

Option 2: Shelter Tablet Collector (simplified method)

If your shelter uses a dedicated intake tablet:

  1. Use the Files or CX File Explorer app on the Android device to:

    • Navigate to /Download, /WhatsApp/, and /DCIM/
    • Copy logs, screenshots, and suspicious media

  2. Transfer these files via USB or SD card to the intake tablet

  3. Upload them to the SIEM cloud server securely (using scp or a secure upload script)

iOS (Jailbroken or via Backup)

# Backup on client machine
idevicebackup2 backup /tmp/device_backup
# Securely send to cloud server
scp /tmp/device_backup user@your-cloud-ip:/opt/backups/

Triage with PiRogue (optional)

  • Deploy PiRogue at remote sites
  • Send pcap or logs securely to cloud:
scp suspicious.pcap user@your-cloud-ip:/opt/forensics/
  • Analyse using tshark or Kibana dashboards

Ongoing maintenance

  • Rotate WireGuard keys every 90 days
  • Run daily log backups:
tar -czf /opt/backup/siem_logs_$(date +%F).tar.gz /var/ossec/logs/
  • Encrypt with GPG or age:
gpg -c /opt/backup/siem_logs_*.tar.gz
  • Schedule cron jobs for parsing logs and auto-alerts

Summary

This setup provides secure, centralised threat detection across multiple locations, without relying on third-party cloud tools. All data stays in your hands, encrypted and protected. It does require ongoing care (VPN upkeep, user access management), but it dramatically lowers local risk while keeping survivors’ privacy at the forefront.

With a bit of training, tech-savvy advocates can handle daily tasks, while specialists can support upgrades and deeper forensics remotely.

Cost estimate cloud-based security system

Running your own infrastructure does come with real-world costs—especially in terms of time and expertise.