• English
  • Japanese

FAQ (network related)

The following are network related FAQ.

I do not know how to set up wireless LAN.

Please refer to here.

Basic version: cannot connect to wireless LAN

his is a checklist to use when you cannot make a connection with wireless LAN on a rental PC or your own PC.
Here, the case of Windows PC is cited as an example.

  • Is your user ID and password used to connect keiomobile 2 / eduroam correct?
    • Using Keio ID issue

      User ID is your ID of your keio.jp account (include "@ keio.jp").
      (e.g. keio.taro@keio.jp )
      Password uses your Wi-Fi password. Your password of keio.jp accout cannot use.
      Check Wi-Fi connection password here.

    • Using ITC account issue

      User ID is your userID of your ITC account plus "@user.keio.ac.jp".
      (e.g. If your ITC account userID is "ub999999", it is "ub999999@user.keio.ac.jp". )
      Password uses your Wi-Fi password. Your password of ITC accout cannot use.
      Check Wi-Fi connection password here.

  • Is wireless LAN working?
    • Rental PC

      It is necessary to set wireless LAN to ON in order to connect to wireless LAN. Wireless LAN of rental PC has no indication of wireless lamp. Check the WiFi icon on the PC screen. To switch ON / OFF, use the "ON / OFF switch" on the right side of the computer.

    • Your own PC

      First, make sure that your PC contains wireless LAN. If it does not, you must have a separate wireless LAN adapter. If it does, check to see if the wireless LAN is ON or OFF. Usually, switch it with the Short Cut Key, and others, do it with a switch on the side of the computer. If you cannot physically find the switch, it is a short-cut key, so if you do not know where it is, check the Internet. (In many models, this is done by pressing a key marked with an antenna at the top of the keyboard while holding down the Fn key.)

Applied version: cannot connect to wireless LAN

This is a detailed check list for a case that the basic version cannot resolve.

  • Is the device working?

    Using Windows 10, Start up with [Start → Windows System Tool → Accessories → Command Prompt] and execute [ipconfig/all].
    As a result, a table of the network device and its status are displayed. Among these, if there is an item called [wireless~], there are no problems with the device. If there isn’t, the device is not working, so open [Computer → Property of system of the top menu → Device manager] then double-click the network adapter → wireless~ → it starts working.

  • Was it set under another environment?

    There are cases where special settings are done in order to connect in a work place or laboratory. If these settings are fixed, it is necessary to change it every time.

    • Setting under Internet Explorer
      Check [Automatic detection] at [Tools → Internet options → connection tab → LAN setting]. A proxy is not used, so do not check it. Even using Chrome or other browser, there are cases where setting of IE is seen, so confirm this setting.
  • Setting of IP Address, DNS

    Cannot connect, when the setting [Automatically obtaining the address of IPv6 or IPv4] and [Automatically obtaining the address of the DNS server] isn't selected. Refer to the link below for setting.
    Example of setting when using Windows 7
    Example of setting when using Windows 8.1
    Example of setting when using Windows 10
    Example of setting when using macOS

I lost track of it during setup.

Please revise wireless LAN connection settings.
Procedure for revising wireless LAN connection settings

I used to be able to use a wireless LAN before, but now I can ask for a user name and password

I used to be able to use a wireless LAN before, but now user ID and password can now be requested.

It may occur when you apply update program such as Windows Update etc.
Please revise wireless LAN connection settings.
Procedure for revising wireless LAN connection settings

Cannot use a specified service

A firewall is constructed between the network inside Keio and the Internet partially limiting the use of some services.
Please refer to here.

And if the firewall software is inside the PC, there are cases where connection is impossible. The setting method differs according to the software, but it might have be better to try to find out if connection is possible when the firewall has been cut.

Last-Modified: November 19, 2018

The content ends at this position.