Student View Knowledgebase
ITSC The Chinese University of Hong Kong Information Technology Services Centre 資訊科技服務處 香港中文大學 Information Technology Services Centre User Areas Network Services Research and Teaching Computing Computer Accounts About ITSC Application Systems Departmental IT Support Contact ITSC Policies and Guidelines Site Index ITSC Information Security Quick Links for Student Quick Links for Staff CUHK
About Us Accounts Department IT Research & Teaching Information Security Network Services Applications User Area
point Mass Mailing
button Campus Backbone Network
button ResNet(Student Hostel)
button IP Phone and Data Port
button VPN
button WiFi
button WiFi Hotspot Partnership Programme
button Self-Service Printing
External Network Connectivity
Set Up and Run a VPN Connection
Max. Connection Time Per Session
All Operating Systems (Except Windows 8 and 8.1)
  • 8 hours with 1 hour idle time out.
  • You can make the connection again when the session expires.
Windows 8 and 8.1
  • A VPN session will end after one hour. You can make a new VPN connection when the session ends. Some users may also need to manually disconnect from network (e.g. Wi-Fi) and then reconnect to it before they can make a VPN connection again.
  • Users of Windows 8 and 8.1 are suggested to disconnect VPN manually, say every 45 minutes and then reconnect to VPN.
  • Microsoft and Aruba are now working together to fix the issue. There is no hot-fix yet. If there is any update from Microsoft, ITSC will announce it here again. 

Step 1

Prepare the following before setting up VPN clients:

  1. computer installed with LAN card
  2. your Computing ID and CWEM password

Step 2

Click below for Windows L2TP IPSec Protocol setup procedures for:

  1. Windows 8
  2. Windows 7
  3. Windows XP

User guides for other VPN connection methods:

  1. Mac OS X 10.5 or above
  2. Mac OS X 10.4
  3. Mac OS X 10.3
  4. iPhone and iPod Touch with firmware 2.x
  5. Windows Mobile
  6. Android 4.x
  7. Android 3.x
  8. Android 2.1/2.2
  9. Fedora Linux 8
  10. Ubuntu Linux version 12.04
  11. Ubuntu Linux version 11.04

Details of VPN Servers:

  • Hostname: (for all VPN services)
  • Max connection time per session: 8 hours with 1 hour idle time out
Connection Services

Number of VPN Services

Total Max. No. of Concurrent Users Supported

Classrooms or other Campus Areas (ClassNet)

2 Aruba Controller

(via Public ISP Network)

2 Aruba Controller

The ITSC would suspend your VPN access to the Campus Network and disable your current network connections when a huge amount of abnormal network traffic was generated from your computer.

For more details, please refer to


Need Help?
For comments and enquiries about this service, please write to the ITSC Electronic HelpDesk at

Privacy Policy ITSC CUHK Disclaimer