Machine Cannot Be Used After Replacing Wireless Router or
Changing Its Settings
When you replace a wireless router, redo the network setup for the machine.
• For Windows:
Use the Setup CD-ROM or follow the instructions on the Canon website.
• For Mac OS:
Follow the instructions on the Canon website.
If this does not solve the problem, see below.
Cannot Communicate with Machine After Enabling MAC/IP Address Filtering or Encryption Key on
With Encryption On, Cannot Communicate with Machine After Changing Encryption Type at Wireless
Cannot Communicate with Machine After Enabling MAC/IP Address
Filtering or Encryption Key on Wireless Router
Check wireless router setting.
To check the wireless router setting, see the instruction manual provided with the wireless router or contact its
manufacturer. Make sure the computer and the wireless router can communicate with each other under this
If filtering MAC addresses or IP addresses at wireless router, check that MAC
addresses or IP addresses for computer, network device, and machine are registered.
If using WEP or WPA/WPA2 key, make sure encryption key for computer,
network device, and machine matches key set for wireless router.
Not only the WEP key itself, but also the key length, key format, the key ID to use, and the authentication
method must be the same for the machine, the wireless router, and the computer.
Normally, select Auto for the authentication method. To set it manually, select Open System or Shared Key
depending on the wireless router's settings.
For details, see
Setting an Encryption