When I'm running chkrootkit it always gives me a warning saying that my network interface eth0 is in promiscuous mode. What does it mean, and do I have to worry about it?
It means that your interface is set to sniff packets from other people. Do you have snort running? That'll put it in promisc mode.
I found the following definition on http://searchsecurity.techtarget.com/sDefinition/0,,sid14_gci518283,00.html: Peter