Introduction
Whether you’re running a Raspberry Pi behind a firewall or managing IoT devices behind a router, being able to connect remotely is critical for monitoring, updates, and control.
This article will explain various ways to remotely access Raspberry Pi and IoT devices behind firewalls and routers, compare solutions, and share security best practices to keep your devices safe.
Why It’s Difficult to Connect Behind Firewalls
This means the device has a private IP address and cannot be directly accessed from the internet.
Challenges include:
Private IP addresses not accessible externally
Firewalls blocking inbound traffic
ISP restrictions on port forwarding
Security risks of exposing devices online
Solutions for Remote Access
1. Port Forwarding
One of the most traditional methods for remote access is setting up port forwarding on your router.
2. Dynamic DNS (DDNS)
But again, security remains a concern.
3. VPN (Virtual Private Network)
You can run a VPN server on your home router or Raspberry Pi, then connect remotely as if you were on the local network.
4. Reverse SSH Tunneling
This avoids port forwarding and works even if the device is behind strict NAT.
5. Third-Party Remote Access Services
They create secure tunnels without requiring router configuration.
Raspberry Pi Remote Access Tutorial
Prepare a Remote Server
This will act as the middleman for your remote connection.
Create SSH Keys
Generate SSH keys on your Raspberry Pi and copy them to the remote server for secure authentication.
Set Up Reverse Tunnel
ssh -R 2222:localhost:22 [email protected]
This command allows you to SSH into your VPS and then access your Raspberry Pi on port 2222.
Automate the Connection
Use tools like autossh to keep the tunnel alive even after reboots or connection drops.
Using VPN for IoT Devices Behind Router
A VPN is one of the most secure methods for remotely accessing IoT devices behind firewalls.
Options include:
Running OpenVPN or WireGuard on Raspberry Pi
Using routers with built-in VPN servers
Cloud VPNs like Tailscale or ZeroTier for simplified configuration
No Port Forwarding Needed
Ngrok
Great for testing or lightweight use.
Dataplicity
Specifically designed for Raspberry Pi remote access.
Tailscale / ZeroTier
Peer-to-peer VPN alternatives remotely access iot devices behind router that connect devices across firewalls and NAT.
How to Protect IoT Devices Behind Firewall
Exposing IoT devices to the internet can make them vulnerable to hacking.
Use SSH keys instead of passwords
Enable firewalls on Raspberry Pi and IoT devices
Keep software and firmware updated
Use strong VPN encryption
Limit access with IP whitelisting
Security should never be an afterthought when setting up remote access behind firewalls or routers.
Use Cases of Remote Access for Raspberry Pi and IoT Devices
Home automation: Monitor and control smart devices from anywhere
IoT projects: Remotely update and debug devices in real-world deployments
Media servers: Access your Raspberry Pi-powered media server remotely
Learning and development: Students can practice coding on Raspberry Pi without physical access
Business IoT systems: Manage industrial IoT devices behind corporate firewalls securely
Future of Remote IoT Access
As IoT adoption grows, remote access methods are evolving.
Summary
From port forwarding and VPNs to modern cloud tunneling solutions, there are many ways to achieve this.
By following the methods outlined here, you can confidently remotely access Raspberry Pi and IoT devices behind firewalls and routers anytime, anywhere.