teach mode
Broadcast your screen
Share your desktop with every approved student at up to 10 FPS. JPEG quality is adjustable in Settings. One click starts it, one click ends it.
30-day demo · no signup, no card, no cloud
Turn any Windows or Ubuntu lab into a disciplined classroom— Every screen in the lab, on one desk.
LabWarden is a portable server and client pair for teachers. Watch all machines live, lock the room in one click, broadcast your desktop at 10 FPS, and take full control of any student PC. It runs on your own LAN, with no internet and no accounts.
- Windows 10 / 11
- Ubuntu 20.04+ on Xorg
- Offline LAN
- RSA-2048 signed licences
Active
Locked
Offline
Click a station to try it
- 10 FPSTeach-mode broadcast
- 15 FPSRemote desktop control
- 64 KBFile transfer chunks
- 30 minRuntime licence re-check
- 2048-bitRSA licence signature
01 — Everything a teacher needs
Nine tools that behave like the commercial suites.
No subscription, no cloud account, and no student data leaving the building. Everything below runs between your teacher PC and the machines in the room.
remote control
Drive any student PC
Full mouse, scroll and keyboard control at 15 FPS. The student always sees a translucent orange banner while you are connected — it cannot be hidden.
screen lock
Freeze one PC or the room
A branded full-screen overlay blocks all input until you unlock. Use it to pull attention back during an explanation, or to end the lesson cleanly.
live monitor
Thumbnail previews
Turn on a 3 FPS preview for any station and watch it from the teacher card. Spot off-task work without walking the aisles.
student share
Let a student present
Grant permission and their share button unlocks. The whole class gets a floating viewer window until you stop the share.
file transfer
Send files to the class
Any file, sent in 64 KB chunks with a progress bar on each student card. Files land in ~/Downloads/ClassFiles automatically.
shutdown
Power down the lab
Shut down one machine or all of them with a 10-second warning shown on each screen. Works the same on Windows and Ubuntu.
chat
Broadcast and private chat
Type once to reach the room, or open a one-to-one thread from a student card. Messages stay on your LAN and are never uploaded.
bulk actions
One-press room commands
Lock all, unlock all, shut down all, stop student share. Each is a single toolbar button — no menus, no per-machine clicking.
02 — Get running in minutes
Pick your operating system for the exact steps.
LabWarden ships as a self-contained folder. There is no installer, no registry work and no Python needed on the machines you deploy to.
Windows — teacher and student PCs
Download the .exe- 1
Copy the server folder to the teacher PC
Put
LabWarden_Server\anywhere you like —C:\LabWarden\is a good default. Administrator rights are not required. - 2
Open port 8765 in Windows Firewall
Run this once in an elevated Command Prompt.
netsh advfirewall firewall add rule name="LabWarden" dir=in action=allow protocol=TCP localport=8765 - 3
Start the server
Double-click
LabWarden_Server.exe. The first launch begins the 30-day demo with four seats — no licence file needed. - 4
Copy the client folder to each student PC
Point every client at the teacher machine's LAN address.
LabWarden_Client.exe --server 192.168.1.10 --port 8765
Ubuntu — student PCs
Download the binary- 1
Log in with the Xorg session
At the login screen, open the gear menu and choose Ubuntu on Xorg. Wayland blocks input injection by design, so remote control will not work on it.
- 2
Copy the client folder to /opt
sudo cp -r LabWarden_Client /opt/labwarden - 3
Allow port 8765 if ufw is on
sudo ufw allow 8765/tcp - 4
Launch the client
Use the LAN address of the Windows or Linux machine running the server.
/opt/labwarden/LabWarden_Client --server 192.168.1.10 --port 8765
Debian and other Linux — from source
Request source access- 1
Install Python 3.9 or newer, plus Tk
sudo apt install python3 python3-pip python3-tk - 2
Install the client dependencies
pip3 install -r client/requirements.txt --break-system-packages - 3
Run the client
python3 client/client_agent.py --server 192.168.1.10 --port 8765 - 4
Optional: run it as a systemd service
This keeps the client running and stops an ordinary user from killing it. The unit file and full walkthrough are in
docs/DEPLOYMENT.md.
03 — Free 30-day demo
Every feature. Zero commitment.
The server starts fully unlocked on first launch. No signup, no licence file, no telemetry. The first four student machines are always free — when a fifth tries to connect, the server shows an upgrade prompt instead of cutting you off mid-lesson.
30days full access
1 + 4server + clients
0credit card required
100%features unlocked
04 — Pricing
Fair prices. One-time or renewable.
Discounts grow with commitment. All licences are RSA-signed, hardware-locked to your server PC.
Starter
₹3,999 / year
was ₹4,788
Small tutoring centres, coaching classes.
- Up to 10 student PCs
- All features unlocked
- Hardware-locked to 1 server
- Email support
Lab
₹8,999 / year
was ₹10,788
A standard 40-seat school computer lab.
- Up to 40 student PCs
- All features + priority support
- Free hardware transfer (once/term)
- Remote setup assistance
Institution
₹19,999 / year
was ₹23,988
Multi-lab campuses, colleges, universities.
- Unlimited student PCs
- Multiple server nodes
- PO / bank transfer / cheque accepted
- Dedicated account manager
Full tier breakdown
Every plan, at a glance.
| Plan | Client PCs | Duration | Price (INR) | Best for |
|---|---|---|---|---|
| Starter | Up to 10 | 1 year | ₹3,999 | Small tutoring centres |
| Starter | Up to 10 | 2 years | ₹6,999 | — |
| Starter | Up to 10 | 5 years | ₹12,999 | — |
| Lab | Up to 40 | 1 year | ₹8,999 | Standard school lab |
| Lab | Up to 40 | 2 years | ₹14,999 | Better value (−17%) |
| Lab | Up to 40 | 5 years | ₹29,999 | Best value (−33%) |
| Institution | Unlimited | 1 year | ₹19,999 | Multi-lab campuses |
| Institution | Unlimited | 2 years | ₹32,999 | Colleges & chains |
| Institution | Unlimited | Never expires | ₹59,999 | Government / large institutions |
| Annual support | — | 1 year | ₹4,999 | Updates + remote setup help |
Custom seat counts (10 · 20 · 60 · 100 …) available on request. Government POs accepted.
05 — Anti-piracy
Seven layers of real protection.
Each licence is RSA-2048 signed, hardware-locked, HMAC-integrity-checked, and re-verified every 30 minutes at runtime. Deleting demo state files does not reset the timer.
RSA
2048-bit digital signature
Every .lic file is signed with our private key. Editing seat count or expiry breaks it instantly.
HW
Hardware fingerprint lock
MAC + CPU + motherboard UUID. Copying the licence to a different PC fails the machine-ID check.
HMAC
Demo state integrity
State file is HMAC-SHA256 signed with a machine-derived key that never touches disk.
⏱
Clock-rollback detection
Setting the system clock back triggers instant expiry — last-seen date is compared each launch.
30′
Runtime re-verification
A background timer re-checks the licence every 30 minutes. Patching startup checks isn't enough.
Startup verification chain
1Load labwarden.lic✓
2Verify RSA-2048 signature✓
3Match hardware fingerprint✓
4Check expiry date✓
5Clock-rollback check✓
6HMAC state integrity✓
7Read seat count✓
Machine ID
A1B2C3D4E5F6G7H8 click to copy
06 — Frequently asked
Common questions, honest answers.
Does the demo really run for thirty days with everything unlocked?
Yes. The server starts fully featured on first launch — no licence file and no card details. The only limit is the seat count: four clients. A fifth connection is refused and the server shows an upgrade prompt.
What happens if someone deletes the demo state file?
Nothing useful. A separate HMAC-signed sentinel file records the original first-run date. Deleting the main state file simply causes the sentinel to restore it, so the trial continues from where it was.
Does remote control work on Ubuntu?
Yes, but the student must log in with the Ubuntu on Xorg session (selectable at the login screen). Wayland — the default on 21.10+ — blocks programmatic mouse and keyboard injection by design.
Is any student data sent to the cloud?
No. LabWarden.Pro is 100% LAN-only. There is no cloud, no telemetry and no analytics. Chat, screen frames and file transfers all stay inside your school network.
Can I move my licence to a new server PC?
Yes. Send us your old Machine ID, your new Machine ID and your purchase receipt. We reissue a new
.lic file within one business day. One free transfer per licence period.Do you accept purchase orders from schools and government?
Yes. We accept POs, bank transfers (NEFT / IMPS / UPI), cheques, demand drafts and online payment. A GST invoice is provided for every commercial order.
Can students see when they are being monitored or controlled?
Screen monitoring (thumbnail preview) is silent by design. Remote desktop control always shows a translucent orange REMOTE CONTROL ACTIVE banner on the student's screen — this cannot be hidden. Screen locks show a full-screen branded overlay.
07 — Get in touch
Run your first controlled class this week.
Tell us your lab size and operating systems. We send the demo build and a quote that matches your seat count, usually within one working day.
- Salessales.LabWardenPro@campuserve4u.co.in
- Supportsupport@campuserve4u.co.in
- Phone+91 00000 00000 · Mon–Sat, 9am–6pm IST