![]() ![]() ![]() The contents of username1 would be copied into /Users making a mess of things. If you were to use the command with out username2 as the destination. This will create the username2 directory then copy all the contents into it. Sudo ditto /Users/username1 /Users/username2 Lets say I want to copy everything from /Users/username1 to /Users/username2 but the directory “username2” does not exist. This includes permissions, metadata, and hidden ‘dot’ files. Ditto will duplicate “all” data from one location to another. You may or may not know about the ditto command on OS X. Pass in inet proto udp from to any port \$ARD_udp no state Pass in inet proto tcp from to any port \$ARD_tcp no state Pass in inet proto tcp from to any port 22 no state Load anchor "com.apple" from "/etc/pf.anchors/com.apple"ĪllowedIn = ""īlock return in proto tcp from any to any port 22īlock return in proto tcp from any to any port \$ARD_tcpīlock return in proto udp from any to any port \$ARD_udp # the system service is used and would removed on termination of the service. # to the anchors loaded by this file, some system services would dynamically # as the nested anchors rely on the anchor point defined here. # Care must be taken to ensure that the main ruleset does not get flushed, # is disabled only when the last enable reference is released. # PF via -E and -X as documented in pfctl(8). # each component which utilizes PF is responsible for enabling and disabling ![]() PF will not be automatically enabled, however. # This file contains the main ruleset, which gets automatically loaded The following is the default pf.conf file with the custom additions. Most examples I’ve found on line assume you are using PF for a server not a desktop system. This simple example will limit access to SSH and Apple Remote Desktop from a range of IP addresses. This follows Apple conventions for 3rd party additions to the system. Your custom lists could be in /Library/Preferences//pf/. You can put reference files anywhere in the system that PF has access to read. ![]() Anchor files appear to follow the naming convention of “com.companyname”. etc/pf.anchors/ – files in this directory are referenced from pf.conf. etc/pf.conf – this is the main rule file which can reference other files or you can load it up with all the setting you need. If you have more complex needs these tools are very useful and they can help you figure out how the firewall system works. I find both of these tools to be overly complex for the rather simple firewall tasks I need to do. Also check out the GUI apps Murus and IceFloor. OpenBSD PF – Shortcuts For Creating Rulesets.A Beginner’s Guide To Firewalling with pf.A Cheat Sheet For Using pf in OS X Lion and Up.Command Line Firewall Management In OS X 10.10.It even has the ability to limit access to your system by connecting OS type. PF has the ability to turn a system into a router and is a very very powerful tool. Using PF to allow connections from a small range of IPs to a few ports on your Mac is about like using a freight company to deliver pizza. Tools like Host files and TCP Wrappers are not effective on modern macOS systems. PF can manipulate virtually any packet data. PF is the tool needed to limit connections to a particular port from an IP range. There is no GUI to limit SSH access to a particular IP range. When you turn on Remote Login this allows incoming connections to SSH, port 22. When ALF is on connections to the Mac from outside systems are blocked by default unless an application has told ALF to allow the connection. This is a very simplified explanation of Mac Firewalls and using the PF (packet filter) to allow certain IP address to access specific services on your Mac, like SSH and Apple Remote Desktop.Ī Mac has two firewall systems, the Application Firewall (ALF) and the Packet Filter firewall (PF)ĪLF can be tuned on in the GUI in System Preferences > Security
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