Networking, Firewall, Mac OS X
This page contains information about the IPFW firewall which is built in to Mac OS X. If you want to use this firewall, use these instructions to turn it on.
Mac OS X comes with a built-in two-way firewall called IPFW.
The IPFW firewall can be activated through the System Preferences application. Run System Preferences. In the Personal area, select Security & Privacy. The Security & Privacy window contains four tabs, including the Firewall tab.
Enabling or disabling the firewall can be performed with the click of a button. You can also selectively enable or disable the firewall for certain services such as FTP connections.
Additional information on Mac OS X and IPFW firewalls can be found at: http://support.apple.com/kb/PH14267.
In order to permit your system to communicate with the VPN through the IPFW firewall, you may need to create custom rules through either the System Preferences application or the command line interface. A list of the ports which need to be permitted to communicate with the VPN server are listed in the Wireless and VPN FAQ.
However, even with the VPN, your computer will not be able to run its own web server, FTP server, or other service replying to requests from outside. The UIUC VPN server does not allow you to create permanent connections with a fixed IP address. Your VPN connection will eventually time out, even if you leave your computer connected and running.
For additional assistance with the Mac OS X IPFW firewall, visit http://support.apple.com/kb/PH14267.