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How can I scan from Canon PIXMA MX700 without disabling OS X firewall?

How can I scan from Canon PIXMA MX700 without disabling OS X firewall?

I have a Canon PIXMA MX700 connected by ethernet. When I first bought it I was using OS X 10.4, and scanner-initiated scanning worked fine. After upgrading to 10.6, neither scanner-initiated or scanning from MP Navigator EX works with the firewall enabled. The firewall lists exceptions for three applications:

Asked by: Guest | Views: 191
Total answers/comments: 1
bert [Entry]

"I was having the same problem with a Canon PIXMA MG5200.
Every time I tried to scan from the button on the scanner it would prompt me to Allow either 'Canon IJ Network Scanner Selector.app' or 'MP Navigator EX 4.0.app' to accept incoming connections.
I checked the advanced firewall settings and both apps were already listed to allow incoming connections.
I tried removing and re-adding them but to no avail.

Eventually I used Disk Utility to 'Repair Disk Permissions' on my system drive. It went through and changed permissions/ownership on a number of the Canon utility's files. I then rebooted and since then it has been working fine - no more prompts.

Give that a try and see how you go."