Firewall
A firewall is a function of the security software installed in the computer or operation system for computer,
and is a system that is designed to prevent unauthorized access to a network.
Precautions When Firewall Function is Enabled
• A firewall function may limit communications between a printer and a computer. This may disable
printer setup and communications.
• During the printer setup, you may be prompted to enable or disable communications, depending on
the firewall function of the security software or operation system. If so, choose to enable
communications.
• When using IJ Network Tool, you may be prompted to enable or disable communications, depending
on the firewall function of the security software. If so, choose to enable communications.
• If you cannot set up the printer, temporarily disable the firewall function of the security software or
operation system.
Important
• If you disabled the firewall function, disconnect your network from the Internet.
• Some applications (like the network configuration software) override firewall settings. Check the
application's settings beforehand.
• If the printer you use is set to
Get IP address automatically
, the IP address changes every time the
printer connects to the network. This may disable printer setup and communications, depending on
the firewall settings. In this case, either change the firewall settings or assign a fixed IP address to the
printer. An IP address can be set using IJ Network Tool.
Changing Settings in Wireless LAN Sheet
Changing Settings in Wired LAN Sheet
When assigning a fixed IP address to the printer, you will need to specify an IP address with which the
computer can communicate.
Note
• For the operation system firewall settings or the security software firewall settings, refer to the
instruction manual of the computer or software, or contact its manufacturer.
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Summary of Contents for Pixma MG6821
Page 27: ...Using the Machine Printing Photos from a Computer Copying Originals Printing Photos 27...
Page 160: ...Loading Paper Loading Plain Paper Photo Paper Loading Envelopes 160...
Page 183: ...Replacing Ink Replacing Ink Checking Ink Status 183...
Page 189: ...When an ink tank is out of ink replace it immediately with a new one Ink Tips 189...
Page 226: ...Safety Safety Precautions Regulatory Information 226...
Page 231: ...Main Components and Their Use Main Components Power Supply Using the Operation Panel 231...
Page 232: ...Main Components Front View Rear View Inside View Operation Panel 232...
Page 256: ...Note The effects of the quiet mode may be less depending on the print quality settings 256...
Page 272: ...Language selection Changes the language for the messages and menus on the touch screen 272...
Page 283: ...Network Connection Network Connection Tips 283...
Page 331: ...5 Delete Deletes the selected IP address from the list 331...
Page 379: ...Printing Area Printing Area Other Sizes than Letter Legal Envelopes Letter Legal Envelopes 379...
Page 410: ...Note Selecting Scaled changes the printable area of the document 410...
Page 421: ...Related Topic Changing the Printer Operation Mode 421...
Page 443: ...Adjusting Color Balance Adjusting Brightness Adjusting Intensity Adjusting Contrast 443...
Page 449: ...Adjusting Intensity Adjusting Contrast 449...
Page 529: ...Printing Using Canon Application Software My Image Garden Guide Easy PhotoPrint Guide 529...
Page 707: ...707...
Page 725: ...725...
Page 764: ...Adjusting Cropping Frames ScanGear 764...
Page 792: ...Scanning starts then the scanned image appears in the application 792...
Page 799: ...Scanning Tips Resolution Data Formats Color Matching 799...
Page 837: ...If icon is displayed Go to check 4 Cannot Find Machine During Wireless LAN Setup Check 4 837...
Page 990: ...1660 Cause A ink tank is not installed What to Do Install the ink tank 990...