hack attempt?

(ddp-28-3.ras228.mantraonline.com[202.56.228.3]) - no such user 'access'
My logsentry messages are full with these type of lines, all from this mantraonline site. It tries to connect with ftp users:backup, access, admin etc.

Is this a hack attempt, and should i do something about it ?

 

 

 

 

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