#89 Tracking FTP Usage
If you're running an anonymous FTP server, you should already be constantly monitoring what happens in the ~ftp/pub directory (which is usually where uploads are allowed), but any FTP server requires you to keep an eye on things.
The ftp daemon's transfer log (xferlog) file format is definitely one of the most cryptic in Unix, which makes analyzing it in a script rather tricky. Worse, there's a standard, common xferlog file format that just about everyone uses (and which this script expects), and there's an abbreviated ftpd.log format that some BSD versions of ftpd use that's just about impossible to analyze in a script.
So we'll focus on the xferlog format. The columns in an xferlog are as shown in Table 10-2.
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