ClamAVModule Oversized.Zip

Scott Silva ssilva at
Wed Apr 25 22:08:41 IST 2007

Dan Farmer spake the following on 4/25/2007 1:47 PM:
> Hello all,
> I've got an issue with Oversized.Zip infections that I'm trying to
> disable and can't seem to nail down the correct settings. I've been
> using clamav for our virus scanning for longer than I care to recall and
> just this morning switched the setting over to clamavmodule to reduce
> the load on our relay. It reduced the load and everything is working but
> we get a lot of zip files (artwork) that compress very well and they are
> getting detected as viruses (Oversized.Zip)
> I've searched the Mailscanner list and the ClamAV list and tried the
> following:
> /usr/local/etc/clamd.conf:
> ArchiveMaxCompressionRatio 0
> /etc/MailScanner/Mailscanner.conf:
> ClamAVmodule Maximum Compression Ratio = 0
Try something like 900 or 1000. I don't think a "0" disables this setting.
> installed versions (i know they're a bit behind):
> MailScanner-4.58.9-1
> install-Clam-0.88.7-SA-3.1.8
> 0.17    Mail::ClamAV
> I reloaded MailScanner, start/stopped it, and finally rebooted the
> machine each time, to no avail. I created a 1MB file that zips to 4k and
> it gets detected everytime. Virus scanning doesn't get cached like SA
> results, so I figure I don't have to keep changing the file each test.
> Is there a way to determine what config file clamavmodule is using
> and/or what current settings are? Where else should I be looking?
> Thanks,
> Dan
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