During a recent rkhunter scan I received a warning that I have a promiscuous interface on eth0. The only change to my system from the last rkhunter scan to the current one is I installed snort and set it up to run in NIDS mode. When I shut down snort and ran another scan the warning went away. What is a promiscuous interface? Do I have one because I configured snort improperly? How important is it to run IDS software on a home computer? Thank you in advance for any help.