ClamAV on Mac with Kerio MailServer
© May 2019 Anthony Lawrence
clamav-users Clamd crashes frequently - macOS Catalina. James Brown via clamav-users Thu, 30 Apr 2020 23:17:13 -0700. ClamAV includes a multi-threaded scanner daemon, command line utilities for on demand file scanning and automatic signature updates.
I downloaded ClamAV source from https://www.clamav.net. A simple ./configure; make; make install in the source directory was all that was required (thogh you do have to install the Xcode Tools from your install cd if you haven't already).
Well, gosh, that was easy. Now what?
Well, that depends on what you plan to do with it. If you only plan to scan files on your drives, there's nothing else you need.If you are planning to use the supplied 'clamav-milter' (see Sendmail Milters),you need to add the milter to your mail configuration (and you would have needed to run './configure --enable-milter' before compiling).See clamav-milter(link dead, sorry)for very basic instructions on adding this milter to sendmail.
ClamAV® is an open source antivirus engine for detecting trojans, viruses, malware & other malicious threats. Documentation & FAQ. Official documentation can be found online at ClamAV.net. Our source code release tarballs also includes a copy of the documentation for offline reading. ClamAV Signatures. Anyone can learn to read and write ClamAV. Download ClamAV for OS X for free. A Macintosh OS X anti-virus software that uses the ClamAV anti-virus library. The project's focus is on usability.
In my case, I wanted to use it with Kerio Mailserver.
Kerio MailServer is able to work with several virus scanning engines. The preferred primary is McAfee, but (depending on your OS platform) other plugins can be used. As of version 6.1, they introduced the ability to do dual scanning, which allows each message to be scanned by two different AV products (one must be their McAfee option). Dual scanning can increase the chances of detecting viri.
Now with the 6.2 release (available in beta as I write this), ClamAV support has been added and can be used either as the stand-alone scanner or as the secondary to McAfee.
To use ClamAV with Kerio MailServer you need to get /usr/local/sbin/clamd running on the Mac (basically the same procedure applys to Linux) . That's going to requre editing (with sudo) two configuration files: /usr/local/etc/clamd.conf and /usr/local/etc/freshclam.conf
ClamAV forces you to at least comment out the 'Example' line from these files:
# Comment or remove the line below.
Example
For freshclam.conf that may be all you want or need to do, but at least this made you aware that the file exists and that you do have options to control freshclam. Freshclam is the program that updates Clamav's virus database, so you probably want to set it to run periodically with cron.
You'll need to do a little more with /usr/local/etc/clamd.conf. In addition to commenting out the 'Example', you need to set 'TCPSocket 3310' and you probably want to set 'TCPAddr 127.0.0.1' unless Kerio is running on a different machine than ClamAV.
With these set, you can start /usr/local/etc/clamd. After starting it, you should see it listening on port 3310:
$ sudo /usr/local/sbin/clamd
$ sudo lsof -i:3310
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
clamd 18975 root 0u IPv4 0x2f92e88 0t0 TCP localhost:dyna-access (LISTEN)
Of course you'll want clamd starting up on reboot. It would be best to handle that through Launchd but you could also just add it to /etc/rc if you want. Launchd gives you more control to restart if necessary.
Kerio automatically tests Clam with an EICAR file but you can send the same pattern to a local user if you aren't the trusting sort. I tested, and found the expected entry in the Kerio Security Log:
I'm glad to see this support added to Kerio. I think it would have been better if they had implemented milter support because that would allow even more options for Kerio users, but this is a welcome addition.
Got something to add? Send me email.
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Inexpensive and informative Apple related e-books:
El Capitan: A Take Control Crash Course
Take Control of Numbers
iOS 10: A Take Control Crash Course
Take Control of IOS 11
Photos: A Take Control Crash Course
I've been banging my head trying to figure this out on my own for the
better part of a day now. I'm running Amazon Linux, have got the
proper clamav packages installed to have the following stuff working.
Clamav Mac Os
* clamd is running* clamscan runs from the command line
* clamdscan runs from the command line
However, clamdscan doesn't recursively crawl the file system, it only
seems to want to scan a single file.
Before i craft a 'find | xargs clamdscan' type of solution for this,
can I just get confirmation that recursive scanning with just
Clamav Download For Windows 10
clamdscan is not possible?
I suspect that most people use clamdscan to do 'one off' scanning,
(mail servers, etc)
In my use case I want to leverage clamd, so that I can take advantage
of the SysLogging capabilities of clamd, but I'm looking for more of a
traditional daily 'scan the entire file system' solution.
--
/John
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