PrintPilotProxy
Secure local forward proxy for PrintPilot clients behind corporate firewalls.
A lightweight Windows background proxy service enabling PrintPilot clients in restricted corporate networks, hospitals, and financial institutions to safely bypass firewalls and tunnel outgoing print jobs to external SMTP mail servers.
Secure End-to-End Communication in Restricted Networks
When PrintPilot clients cannot access the public internet directly, PrintPilotProxy acts as a controlled, secure bridge.
1. PrintPilot Clients
PCs on an isolated local network (LAN). They discover the proxy via UDP 37421 broadcast and connect over TCP 3128.
2. PrintPilotProxy
Enforces IP ACL rules and HMAC authentication. Establishes an encrypted TCP tunnel for authorized connections.
3. Firewall & SMTP
Email traffic safely passes out through the single firewall rule permitted only for the proxy server host.
Enterprise-Grade Security and Effortless Management
Secure HTTP/HTTPS Tunneling
Securely forwards client requests to external SMTP and mail servers using the standard CONNECT method, creating an encrypted blind tunnel.
Client Access Control (IP ACL)
Deny-by-default architecture. Only computers with IP addresses or CIDR ranges you explicitly allow can connect to the proxy.
LAN Auto-Discovery
UDP 37421 broadcast allows PrintPilot desktop clients to automatically discover the proxy server on your local network with zero manual setup.
Windows Background Service
Runs 24/7 as a native, resilient Windows Service, remaining fully operational even when no users are logged in.
WPF GUI Management Dashboard
Modern desktop dashboard to configure IP access rules, customize listening ports, select network interfaces, and monitor service status in real time.
Zero Interception & Privacy-First
Never decrypts, intercepts, or logs SSL/TLS traffic (No MITM). Your sensitive email and document data stays strictly within your own infrastructure.
Get Started in 3 Simple Steps
Download & Install the Windows MSI
The installer sets up both the background Windows Service and the WPF management application in a single quick step.
Configure Network Rules in the GUI
Open the management console to choose the network adapter, set the listening port (default 3128), and specify authorized client IPs.
Start the Service and Run
Once running, PrintPilot clients on your LAN automatically detect the proxy and route email transmissions securely through it.
Everything You Need to Know
Is PrintPilotProxy completely free?
Yes! PrintPilotProxy is 100% free and open-source software under the MIT License. No hidden fees, usage quotas, or subscriptions.
Do document or email contents pass through external servers?
Never. PrintPilotProxy runs entirely on your local infrastructure (on-premise). It never connects to any third-party cloud servers and passes traffic through an encrypted tunnel.
Which Windows operating systems are supported?
Windows 10, Windows 11, and Windows Server 2016, 2019, and 2022 (64-bit) are fully supported.
How does PrintPilot communicate with the proxy?
Clients connect via the HTTP CONNECT protocol (default port 3128) and find the server automatically using UDP 37421 discovery broadcasts on your LAN.
Download PrintPilotProxy Now
Install 100% free to safely connect firewalled PrintPilot clients across your corporate network.