Canon PIXMA MG3660 Online Manual page 481

Make sure Enable bidirectional support is selected in Ports sheet of
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properties dialog box of printer driver. (Windows)
Make sure security software's firewall is off.
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If your security software's firewall is on, a message may appear warning you that Canon software is attempting
to access the network. If this warning message appears, set security software to always allow access.
If you are using any programs that switch between network environments, check their settings. Some programs
use a firewall by default.
If using a router, connect machine and computer to LAN side (same network
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segment).
If machine is connected to an AirPort Base Station via LAN, use alphanumeric
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characters for network name (SSID). (Mac OS)
Check machine's TCP/IP setting and disable IPv6.
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To check the current TCP/IP setting, print out the network setting information using the operation panel.
Printing Network Settings
If "TCP/IPv6" is set to "Enable", both IPv4 and IPv6 are enabled.
Press and hold Stop button and release it when Alarm lamp flashes 23 times.
IPv6 is disabled and only IPv4 is enabled.
If the problem is not resolved, redo setup.
• 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.
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