Block Internet access to specific apps on specific Wi-Fi networks

Networkwifi

My company just set my laptop up with Backblaze, and the backups are killing my crappy rural DSL connection when I bring the machine home. Are there utilities that can block specific applications from accessing the Internet on specific Wi-Fi networks?

I've seen recommendations here for apps like Little Snitch or Radio Silence that can control Internet access on a per-app basis, but they don't seem to say anything about specific Wi-Fi networks. Can Automator control these apps when connecting/disconnecting from a specific Wi-Fi network?

Best Answer

Try TripMode, https://www.tripmode.ch

It is specific-network-aware, so you can activate it when you are on the constrained network, and after that it will remember, and auto-activate itself there.

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Days later, I've finally figured it out. The com.apple.mDNSResponder.plist file located in /System/Library/LaunchDaemons/ was corrupted, and for some reason attempts to reset it were not being saved.

I copied this file from a macbook that was able to connect, and, since I'm using Lion, added in the option to allow appending search domains by inserting the line

<string>-AlwaysAppendSearchDomains</string>

in the following position:

<string>/usr/sbin/mDNSResponder</string>
<string>-AlwaysAppendSearchDomains</string>
<string>-launchd</string>

I then restarted the machine. This appeared to do the trick.

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Delete the following 3 files located in ~Library > Preferences > SystemConfiguration :

 com.apple.airport.preferences.plist
 com.apple.network.identification.plist
 NetworkInterfaces.plist

Delete the airport / wifi network interface and re-create.
Reboot and connect to WiFi

Best Answer

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MacOS – No internet access on MacBook Air, though I can connect to networks

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