Port scanning???

Hello All,
I usually chcek my server logs on daily basis.For last one month I have been observing some specific lines in my logs;

date *.*.* server prodtpd[12589]Port scanning???erver.foo.com ( localhost [127.0.0.1])ftp sesion closed
date *.*.* server prodtpd[12589]Port scanning???erver.foo.com ( localhost [127.0.0.1])ftp sesion closed
date *.*.* server prodtpd[12589]Port scanning???erver.foo.com ( localhost [127.0.0.1])ftp sesion closed
date *.*.* server prodtpd[12589]Port scanning???erver.foo.com ( localhost [127.0.0.1])ftp sesion timeout ! NO transfer !!
date *.*.* server prodtpd[12589]Port scanning???erver.foo.com ( localhost [127.0.0.1])ftp sesion closed ! NO transfer!

it's very strange that someone on my PC is trying ftp locally.
I think someone is scanning the ports on daily basis!!!
Or I am wrong?
What this all lines?
Help needed!!
Thank you!!!

 

 

 

 

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