Clamav :: Never Enable The SUID Or SGID Bits For Clam AntiVirus Binaries

Feb 17, 2007

If you are installing ClamAV for the first time, you have to add a new user and group to your system: 3

# groupadd clamav
# useradd -g clamav -s /bin/false -c "Clam AntiVirus" clamav

Consult a system manual if your OS has not groupadd and useradd utilities. Don't forget to lock access to the account!

WARNING: Never enable the SUID or SGID bits for Clam AntiVirus binaries.

I've done the above before installing ClamAV, what do I do to lock access to the account and siable the SUID or SGID bits for Clam AntiVirus binaries?

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Antivirus To Use With Cpanel Apart From Clamav?

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is there a antivirus i can use with cpanel apart from clamav? found a virus on my work pc this morning that was trying to send emails out so i want my cpanel server to prevent any emails with virus's going out.

i was told clamav would slow down my server so i thought about AVG and was just wondering what other people have installed.

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I can't update Clamav.

root@constan [~]# freshclam
sda1: write failed, user block limit reached.
ClamAV update process started at Sun Jul 26 15:56:52 2009
WARNING: Your ClamAV installation is OUTDATED!
WARNING: Local version: 0.95.1 Recommended version: 0.95.2
DON'T PANIC! Read http://www.clamav.net/support/faq
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WARNING: Incremental update failed, trying to download main.cvd
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Jun 2, 2008

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My peak time usage is shown by this graph ( for each VPS):
[url]
(so this multiplied by 3 is what the new server must be capable of handling)

Now, my query is that:

1. Exactly what speed bandwidth am I using accrding to that image? Is that 12megabytes per second or is that 12 megaBITS per second. Because if it is 12Megabits, then the actual bandwidth speed that I am using would be around 12/8 = 1.5MBPS. ?

2. I think your first question reply would answer this but I will still confirm: will a 10mbps unmetered server be able to handle this kind of bandwidth usage? remember that the graph is only for a single VPS. There are two more VPSes using the same bandwidth at the same time.

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such this pic

show this pic

[url]

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e0c.clamtmp to daily.cvd: Permission denied

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Ie: WHM -> Plugins -> Configure ClamAV Scanner -> Scan ALL items

After doing a few manual scans however (using 'clamscan -ri') I'm finding infections in the account mail folder.

1. Is there a good guide to setting up ClamAV on a cPanel serve do do automatic mail scanning? I was under the impression that ClamAV scans emails also however after doing some reading people seem to recommend MailScanner.

2. My logwatch is giving me the following error.

The ClamAV update process (freshclam daemon) was not running! If you no longer wish to run freshclam, deleting the freshclam.log file will suppress this error message. 

The freshclam daemon wasn't running so I've started it (freshclam --daemon). I've also checked the freshclam.conf file and the logrile is set as follows:

UpdateLogFile /var/log/freshclam.log

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I am recently trying to install the ClamAV program onto my servers. Everything goes well and it is able to get installed but I am encountering some problems.

1) The program keeps recurring the scanning process on my /home directory and will not stop looping.... I waited for around 12 hours but it still keeps looping....

2) I have started the clamd and tested it out by loading a virus onto my server... Nothing happens... the file still is able to be uploaded and excuted....

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I would like to know if its possible and if someone is using a remote clamav server to check the messages against viruses.

We are running around 15 servers and all of them have the clamd installed, and we waste time upgrading the software, database and also monitoring many services that are exactly the same one.

Our idea is to setup a central server that those 15 servers will send the message for checking first.

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ClamAv Update And Installation

May 2, 2008

I have some problems on my web server. Firstly i must say that, i noticed some of trojans and viruses effect my server. Ý saw that when loading my web pages, i saw a foreign link in the status bar while pages loading. When i search this pages, i saw that some codes that insert a hidden iframe with connected some other sites. This is iframe injection problem.

And after search i saw that this codes are infect most of index.php, index.html, index.htm and footer.php, footer.htm and footer.html pages on my server.

After this i clean all the infected files and activate the php safe mode that is OFF before. And i disable some system functions from php.ini

But more important than this, i realize that my ClamAv antivirus out of date. But when i want to update ClamAv with yum update clamav, i faced some errors about yum. And i take a help from my hosting firm to solve this problem.

And after this, i update my ClamAv 0.88 to ClamAv 0.92. And after this installation i scan my system with clamscan and remove 1250-1300 trojan and viruses from users mail directories

After this clean operation, i scaned the system again and no other trjans or viruses found.

But, after the ClamAv update to ClamAv 092 version there is a big problem again.

When a mail user sent a mail to anyone, everyhing is shown normal on mail program (Outlook, Thunderbird...) as sent, but mail is not delivered to recipient. And at the same time a clamav... directory is created in the /tmp directory. And this directories fill the user's mailbox quota. When i clean this directory from /tmp directory the quota turn to normal size. This problem occurs most of the mail users traffic. But this problem is begun after the ClamAv update process

But this problem is not shown all mail accounts.

This clamav.. directory that is created in /tmp directory have 4 files: main.db, mainmdb, main.ndb and copying files.

And the message that is returned from user that mail quota's exceeded is shown below.
And some times message is not return.

< mail_address> (expanded from
*** < mail_address>): can't create user output file. Command
*** output: LibClamAV Error: cli_untgz: Wrote 0 instead of 512
*** (/tmp/clamav-d342a5c0705d099fd95b1b0793092e0b/main.ndb) LibClamAV Error:
*** cli_cvdload(): Can't unpack CVD file. LibClamAV Error: Can't load
*** /var/clamav/main.cvd: CVD extraction failure ERROR: CVD extraction failure
*** procmail: Error while writing to "/var/log/procmail.log" procmail: Quota
*** exceeded while writing
*** "/home/domain/homes/mail_user/Maildir/tmp/1209623791.26249_0.ns1.site.com.tr"
*** procmail: Quota exceeded while writing
*** "/home/domain/homes/mail_user/Maildir/tmp/1209623791.26249_1.ns1.site.com.tr"
*** Time:1209623791 From: To: User: mail_adresi Size:248
*** Dest:/etc/webmin/virtual-server/clam-wrapper.pl /usr/bin/clamscan Mode:None

Shortly, after updating of ClamAv on my server, all the mails in server mail traffic has a clamav... directory in /tmp directory and this directories have main.db, main.mdb,main.ndb and copying files.

What is the wrong, or what must i do to solve this?

if i remove Clamav from system, everything turn to normal in the mail traffic.

Also i install chkrootkit and scaned the system. There is no bad result shown. All results said “not infected”

As a result i can not find how i can run the ClamAv on my system. Is it solve reinstall old version again.Or do you advice to install a new program? Ýf yes, which one?

My Os is CentOS 4.6, Mail Server Postfix Mail Server 2.2.10, Spam filter SpamAssassin Mail Filter 3.1.9

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Mar 29, 2008

i have installed antivirus.exim on server but if i like to set filters for particular domain
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