Perhaps bro is free (unless you spring for commercial support) whereas with snort you may want to pay to subscribe to the filter updates (not certain). http://

Perhaps bro is free (unless you spring for commercial support) whereas with snort you may want to pay to subscribe to the filter updates (not certain). http://www.snort.org/vrt/buy-a-subscription http://www.snort.org/vrt/buy-a-subscription