firewall - Block incoming and outgoing connections to a program in macOS - Super User
However, I wanted to stop frequenting Facebook on my Mac, so I needed a more permanent solution other than deactivating my account because I still want to be able to access Facebook from my iPhone. With a view commands in Terminal, this can be done in no time! This is awesome!
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- Using Packet Filter (pf) firewall to block outgoing traffic on macOS!
One question however… How do you undo it afterwards? Simple, just go back into Terminal following the same instructions and locate the website you blocked and remove it. Do you need to restart your computer or something? So I went back, deleted the websites I had out in there originally and saved then exited.
Help ASAP. Mason Sklut.
Michael Nov. Mason Sklut Dec. I am running an application that regularly phones home and reports a little more information than I'm comfortable with. I am looking to use Lion's built in PF firewall to achieve this. I understand that a commercial utility like LittleSnitch would make this a trivial endeavor.
Block outgoing connections on Mac (OS X)
However, this is not a viable solution for me. I find their asking price too high, and the built in firewall should be able to do the trick. I've been using IceFloor to modify the PF configuration to block incoming connections with great success. However, I'm running into some problems blocking outgoing connections.
From what I've read, the following rule should be correct:.
It seems to be blocking the packets properly, but instead of returning an RST packet, it is silently dropping the outgoing packets. This is causing the app to hang while it waits for the connection attempt to timeout. Is this rule written correctly to achieve what I would like to achieve?
OS X: About the application firewall
Has anyone else attempted something like this using PF? Sign up to join this community. The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered. Ask Question. Asked 7 years, 3 months ago.
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