full-disclosure - Strange FTP log messages

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From: mikehome at kcisp.net (Mike Barushok)
Subject: Strange FTP log messages

Nagios or netsaint (or anything else that simply
connects to TCP/21 without authenticating) being used to
monitor FTP? 

On Fri, 24 Sep 2004, ken wrote:

> Does anyone recognize this behavior? This has been occurring 
> for a while. I am curious as to what would cause this. This 
> has been happening on a wide range of IPs. Any hints would
> be appreciated, thanks in advance.
> 
> -k
> 
> 
> Sep 23 18:02:45 webnode01 pure-ftpd: (?@...82.31.47) [INFO] Logout - CPU time spent: 0.000 seconds.
> Sep 23 19:02:49 webnode01 pure-ftpd: (?@...82.31.47) [INFO] New connection from 65.82.31.47
> Sep 23 19:02:49 webnode01 pure-ftpd: (?@...82.31.47) [INFO] Logout - CPU time spent: 0.000 seconds.
> Sep 23 20:02:56 webnode01 pure-ftpd: (?@...82.31.47) [INFO] New connection from 65.82.31.47
> Sep 23 20:02:56 webnode01 pure-ftpd: (?@...82.31.47) [INFO] Logout - CPU time spent: 0.000 seconds.
> Sep 23 21:03:03 webnode01 pure-ftpd: (?@...82.31.47) [INFO] New connection from 65.82.31.47
> Sep 23 21:03:03 webnode01 pure-ftpd: (?@...82.31.47) [INFO] Logout - CPU time spent: 0.010 seconds.
> Sep 23 22:03:11 webnode01 pure-ftpd: (?@...82.31.47) [INFO] New connection from 65.82.31.47
> Sep 23 22:03:11 webnode01 pure-ftpd: (?@...82.31.47) [INFO] Logout - CPU time spent: 0.010 seconds.
> Sep 23 23:03:18 webnode01 pure-ftpd: (?@...82.31.47) [INFO] New connection from 65.82.31.47
> Sep 23 23:03:18 webnode01 pure-ftpd: (?@...82.31.47) [INFO] Logout - CPU time spent: 0.000 seconds.
> Sep 24 00:03:25 webnode01 pure-ftpd: (?@...82.31.47) [INFO] New connection from 65.82.31.47
> Sep 24 00:03:25 webnode01 pure-ftpd: (?@...82.31.47) [INFO] Logout - CPU time spent: 0.000 seconds.
> Sep 24 01:03:33 webnode01 pure-ftpd: (?@...82.31.47) [INFO] New connection from 65.82.31.47
> Sep 24 01:03:33 webnode01 pure-ftpd: (?@...82.31.47) [INFO] Logout - CPU time spent: 0.000 seconds.
> Sep 24 02:03:40 webnode01 pure-ftpd: (?@...82.31.47) [INFO] New connection from 65.82.31.47
> Sep 24 02:03:40 webnode01 pure-ftpd: (?@...82.31.47) [INFO] Logout - CPU time spent: 0.000 seconds.
> Sep 24 03:03:48 webnode01 pure-ftpd: (?@...82.31.47) [INFO] New connection from 65.82.31.47
> Sep 24 03:03:49 webnode01 pure-ftpd: (?@...82.31.47) [INFO] Logout - CPU time spent: 0.000 seconds.
> Sep 24 04:03:55 webnode01 pure-ftpd: (?@...82.31.47) [INFO] New connection from 65.82.31.47
> Sep 24 04:03:55 webnode01 pure-ftpd: (?@...82.31.47) [INFO] Logout - CPU time spent: 0.000 seconds.
> 
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