Help & Support

FAQ on CityU Wireless Local Area Network (WLAN) Service

What is a WLAN?

A wireless local area network (WLAN) is a flexible data communication system using radio frequency (RF) technology to transmit and receive data over the air. It can be integrated with existing campus network seamlessly and easily so that we can enjoy network computing without looking for a physical network port.

What are the advantages of using WLAN?

  • Provide broader network coverage.
  • Allows completely wireless connection (both network and power) when using laptop computers or any wi-fi device.
  • Users can access campus network in ordinary classrooms or common areas where network port is not available.
  • Provide network service where conventional network wiring is not possible or difficult.
  • Provide more scalable network service.

What are the limitations of using WLAN?

  • The actual data throughput of WLAN is far less than that of the convention ethernet (wired) network and is on a shared base among concurrent users of an access point.
  • Bandwidth still cannot support large class size running high bandwidth demanding applications.

Which OS platforms are compatible with the CityU Wireless LAN environment?

Most modern Operating Systems with WPA/WP2 support or Web Browser installed are compatible with the CityU Wireless LAN environment.

Can I access the the CityU e-Portal with Wireless LAN?

Yes.

Where can I use the WLAN?

You can access the WLAN almost everywhere inside the campus. Currently more than 2800 Access Points are installed throughout the University to provide WLAN service. Area covered includes staff offices, classrooms, Lecture Theatres, the 4/F Podium, Student Canteen, Chinese Garden, Covered Terrace, Multi-function Halls of the Student Residence, etc. As an ongoing improvement of services, more coverage and better connection quality, will be pursuited. Click WLAN Coverage button for more details.

What equipment is required to access the WLAN?

Any wi-fi device compliance to the IEEE 802.11a, b, g, n or ac standard. In general, most notebook computers and smartphones have been equipped with wireless connectivity.

You may visit http://www.cityu.edu.hk/csc/deptweb/facilities/ctnet/wlan/wlan-summary.htm for the configuration guides for various wi-fi devices.

Can students use their own wi-fi devices?

Yes. Student may use any 802.11a/b/g/n/ac compliance wi-fi device to connect to the CityU WLAN. Please note that card registration is not required for connecting to the secure network such as "CityU WLAN (WPA)", "Universities Wi-Fi", etc. Card pre-registration is required if you want to connect to the insecure network "WaveLAN Network". Each student can register two wireless LAN cards Register Card button(one for notebook computer and one for smartphone). Before registration, you have to know the hardware/MAC address of your wireless LAN card. To know how to find the MAC address in various operating systems, please click here or consult the device's user guide.

Can staff use their own wi-fi devices?

Yes. Please note that card registration is not required for connecting to the secure network such as "CityU WLAN (WPA)", "Universities Wi-Fi", etc. Card pre-registration Register Card buttonis required if you want to connect to the insecure network "WaveLAN Network". For more details, please call the CSC Help Desk at 3442 7658.

Can alumni use their own wi-fi devices?

Yes, CityU alumni can use their own wi-fi devices to access the wireless network (SSID) "alumni". Registration of the wi-fi device is not required.

The website of registering the Wireless LAN cards, Network Connection Management System, cannot be reached.

If you are using other ISP broadband /dial-up service at home or in office, please kindly setup a VPN connection in your PC. After established CityU VPN connection, you can go to https://www6.cityu.edu.hk/ncm/login.asp for network application. Please use your Network Connection Password to login VPN. Network connection password is the password used to login a PC in CSC Teaching Studio Areas.

For more details of VPN setup guide, please visit http://www.cityu.edu.hk/csc/deptweb/facilities/ctnet/vpn/vpn.htm

When you are in CityU Campus, please login a PC in CSC Teaching Studio Areas or Express Terminal and visit https://www6.cityu.edu.hk/ncm/login.asp for network application.

What is the bandwidth of the WLAN?

CityU WLAN conforms to the industrial standard IEEE 802.11 a, b, g, n or ac. It allows a maximum of 1.3 Gbps (802.11ac), 300 Mbps (802.11n), 54Mbps (802.11a/g) or 11 Mbps (802.11b) transfer speed and should satisfy general network applications such as Internet browsing, e-mail application, etc.

What is the suggested usage of CityU Wireless LAN?

  • CityU e-Portal to access all information about the university at your finger tips
  • Web based online learning
  • Internet browsing
  • E-mail
  • Read news
  • Online discussions (forum and chat)
  • File transfer and sharing

Do I need to login?

Yes. Before you can connect to the WLAN, user authentication is required for security purpose. You are prompted for a valid logon. Please use your Network Connection Password to logon.

There are two login methods available: secure (WPA/WPA2) and insecure (Web), which one should I choose?

  • We strongly recommend all users to use the WPA/WPA2 method to establish WLAN connection. Once the connection is established, all data sent to the air is encrypted. Even though someone captures the data, he/she cannot decrypt the data so easily. Hence privacy and security are ensured.
  • The Web logon method is purposely provided for those platforms that do not supporting WPA/WPA2 connection. Only your logon name and password are encrypted during authentication but other information send to the air is not encrypted.

I cannot login. How can I solve this problem?

  • Please use your network connection password to logon. If you forget your password, please visit the CSC Service Counter to reset the password.
  • Your WLAN account has been disabled because our network security system found that there was connection under your account spreading computer viruses or similar. You will be notified by email. After you have cleaned up your computer and notified CSC by email (csc@cityu.edu.hk), the account will be re-activated within 2 working days.
  • The wireless LAN connection profile stored in your wi-fi device is corrupted or outdated. You may remove it and re-create a new connection profile.
  • Apply the latest OS patches and device driver to your wi-fi device.

I am CityU Alumnus but cannot login. How can I solve this problem?

  • For CityU Alumnus, please visit the home page of the Alumni Relations Office (ARO) for more information and procedures to reset your password.

I can login but cannot access the campus network nor the Internet. How can I solve this problem?

  • Please check the network configuration of your system. The IP address, DNS servers and gateway parameters of a WLAN client are assigned by DHCP servers. Do not hard code these parameters in your system manually.
  • Remove proxy setting in your browser.
  • Temporary disable the personal firewall if it is enabled in your system to see if it can solve the problem. If so, you need to modify the policies of the firewall.

I can login inside CityU campus but fail to login at some wi-fi hotspots. How can I solve this problem?

  • The wireless LAN connection profile stored in your wi-fi device is corrupted or outdated. You may remove it and re-create a new connection profile.
  • This may happen if you are using long password (longer than 16 characters) at some wi-fi hotspots. Some wi-fi service providers do not support long password, therefore your login request will be rejected. You need to use a shorter password to solve the problem.

Do I need to logout?

The system will terminate all your sessions automatically if your WLAN device is idle for more than 30 minutes. However, if you need to logout manually for any reason, you may:

What is the procedure to use the WLAN?

For Staff and Students

  1. Power on your wi-fi device and select the desired wireless network (SSID) to connect
  2. Logon to the wireless network via WPA/WPA2 or via Web logon page by entering URL of a web site (depending on the SSID selected). Please note that card pre-registration Register Card buttonis required if you want to connect to the insecure network "WaveLAN Network".
  3. You can now access the Internet and campus network over the CityU WLAN
  4. Logout or disconnect from the WLAN

For Alumni

  1. Power on your wi-fi device
  2. Connect and logon to the "alumni" wireless network
  3. You can now access the WLAN

I use my notebook computer to connect to the WLAN and find the connection speed fluctuates and connection sometimes drops.

You are kindly advised to upgrade driver of the WLAN adapter to the latest. Please contact your supplier and follow the instructions to download and upgrade the driver.

If you find the wi-fi signal level too low, you can maximize the transmission power of your WLAN card.

csc@cityu.edu.hk