chkrootkit false positives

I have chkrootkit and PortSentry installed.

When I run a chkrootkit (and PortSentry is running), I get bindshell INFECTED errors on ports 465 1524 6667 31337.

When I check via NetStat, sendmail is on 465 & PortSentry is on 1524, 6667 & 31337.

If I shut down sendmail & PortSentry... then chkrootkit comes back clean.

Am I seeing false positives... or should I look deeper?

 

Have a look here: http://www.tutorials-blog.com/linux-security/chkrootkit-shows/