In a recent blog post at ZDNet, Jason O’Grady mentioned the benefits of running an application that monitors outgoing (egress) traffic on your Mac. OS X malcode has been in the news lately, with Trojaned versions of iWork and Photoshop CS4 appearing on the BitTorrent network, and Jason offers Little Snitch (an egress firewall application) as “one way to keep tabs on software that likes to call home” (such as a Trojan).

As our recent series on Mac AV suggests, I don’t run antivirus software on my OS X client systems. However, I do run Little Snitch. We neglected to mention egress firewalls as a worthwhile addition to good OS X configurations in that series, and would like to take the opportunity to do so here.

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