![]() ![]() It can also be used to forcibly constrain its access to the network by limiting the available outbound services. ![]() The main purpose is protecting services running on your Mac from remote inspection or intrusion. ![]() Use Murus to configure a packet filter rule set. Murus is a graphic user interface front end for PF. PF is the OS X built in network firewall and can be configured using the shell terminal or third party apps like Murus. Network firewall are unable to pass/block specific applications as they are not aware of which application is making a connection. Packet filter rules affect all apps running on the system. PF can filter traffic based on many packet attributes like source and destination IP addresses and ports, protocol, and many others. Common packet filters like OS X’s PF do not allow packets to pass through the firewall unless they match a user defined and established set of rules. ![]()
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