Suspension of Access to the Campus Network

The ITSC would suspend your VPN/Web/Modem access to the Campus Network and disable your current network connections when a huge amount of abnormal network traffic was generated from the computer that you were using (could be your personal one or a campus public one).

This abnormal network traffic kept our network equipment busy in handling its flow and in turn resulted in a slow response on the Campus Network. To protect public interest, we would take prompt action to suspend your account.

Causes of Abnormal Network Traffic

The major reason that a computer produces abnormal traffic is that it is infected by a virus/worm or you have mis-configured a peer-to-peer software.

Corresponding Measures

1. Clean up the virus/worm
   Follow the instructions at http://www.cuhk.edu.hk/itsc/security/protectpc/remove.html to check and remove a computer virus/worm.
2. Check your computer regularly
   To avoid any inconvenience caused by account suspension, please check out the recommendations at http://www.cuhk.edu.hk/itsc/security/protectpc/index.html to protect computers from viruses or other attacks.
3. Mind the risks of Peer-to-Peer File Sharing
   Pay attention to the risks you may be exposed to when using peer-to-peer software by visiting http://www.cuhk.edu.hk/itsc/about/p2p-risk.html.

To resume your Access

Please contact the ITSC through one of the following channels.

1. Electronic HelpDesk https://helpdesk.itsc.cuhk.edu.hk/group/abnormal-traffic
2. Hotline at 2609 8845 (office hours)
3. HelpDesk (office hours) at 1/F Pi Chiu Building

Your network access will be resumed on the following working day once we have received your request and you will also receive a confirmation sent through the E-HelpDesk.