When it comes to your security, it seems like there are never enough measures you take to be completely safe. NetBarrier is a complete solution for Mac which should protect you against any intruders.
NetBarrier comes as a full security suite, with specific sections to work with, from trojans to firewalls, monitoring and sensitive data protection. Although I found the installation a little lengthy, once up and running NetBarrier is quickly accessible. The big bright interface makes it easy to work with the different sections and NetBarrier includes step through guides for simple setup.
NetBarrier lets you create your own firewall rules to decide what connections you accept or not. You can also choose what sort of ads to hide from the internet and block trojans from a regularly updated list.
The antivandal tools are a cinch to work with and help you guard every aspect of your Mac, from spyware to dodgy incoming information or by creating different groups of users with different access levels.
The Washing Machine is great for getting rid of files such as cache or history from your internet programs.
One drawback to NetBarrier's omnipresence is that it may cause your Mac to run a little slower at times.
NetBarrier is a full security suite to protect and monitor your Mac.