Follow the appropriate directions below, depending on which version of Mac OS X you are using. If your Mac OS X firewall is not turned on, it is not the cause of the problem, and changing its settings will not help.Ĭonfiguring the Mac OS X firewall is slightly different on different versions of Mac OS X. If none of these help, then you should see if your Mac OS X firewall could be causing the problem. If you arent sure, open up System Preferences from the Apple menu in the upper left hand corner, and choose Security. A firewall scans incoming network traffic. For OS X, often the firewall is disabled. But the firewall has to be turned on by the user by default, the firewall is set to off. Macs comes with a built-in firewall tool that you can use to reduce the number of points open to attack by malicious actors. Choose to Fetch > Preferences, click the General tab, and make sure the Use passive mode transfers (PASV) checkbox is checked. Your Mac’s default settings may be violating your company’s security policy.
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