CentOS 5 Server :: Amavisd Not Detecting Viruses?
Feb 8, 2010
I have postfix setup with amavisd and I tried to send myself an email with the eicar file however it lets the email go through to my inbox. When I restart the amavisd service, there are no errors in the log and it finds all the decoders for different file types and I also see this come up:
Feb 8 14:45:44 Mailgate amavis[3116]: Using primary internal av scanner code for ClamAV-clamd
Feb 8 14:45:44 Mailgate amavis[3116]: Found secondary av scanner ClamAV-clamscan at /usr/bin/clamscan
Everything seems to work but it doesn't scan the file for viruses. Also, I've double and triple checked and my amavisd.conf file doesn't have the option enabled to bypass virus scanning.
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Feb 10, 2010
host postfix/qmgr[13020]: warning: connect to transport amavisd-new: No such file or directory
How can I fix this error? I have searched the inet but can't seem to find a solution.
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Jul 21, 2010
I followed this how to document [URL] to install postfix, Amavisd, SpamAssassin and ClamAV. My postfix installation is working fine and I can send and receive emails fine. However, it looks like SpamAssassin is not catching any emails. Emails do get passed over to Amavisd as I can see in the logs but ALL Messages comes out CLEAN without being tagged as spam.
As per the document, I did test by sending a test virus email
sendmail -i your-address@example.com < sample-virus-simple.txt.
This is caught and NOT let through so ClamAV is ok but when i send
sendmail -i your-address@example.com < sample-spam-GTUBE-junk.txt
it does get delievered without being detected as SPAM or tagged as SPAM.
As I said, I have followed the documentation dot by dot and hence do not have spamassassin starting up as a service but i guess amavisd starts it within itself as a module.
Also, my postfix version is the one that supports mysql virtual tables which I got from rpmforge.
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Apr 22, 2010
Is there a package in YUM now that automatically updates amavisd-new to version 2.6.4??? My VM comes stock with version 2.5.4 and i absolutely CANNOT update it to 2.6.4 due to incompatibility issues in Maia Mailguard. When I do the package upgrade I don't understand but i specifically do NOT choose amavisd-new to be updated and everytime I check to see my latest version it is at version 2.6.4 I don't get it am I missing something? What can be causing my package to always get upgraded to the new version when I am not upgrading it.
I have spamassassin 3.3.1
clamav 0.96
postfix 2.3.3
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Oct 21, 2010
I work for a university institute and administrate its servers "incidently". Currently I am putting some work into our mail server configuration (sendmail 8.13.1 with amavisd-new-2.6.4). Recently I got amavis to verify DKIM signed mails. Now my plan was to sign outgoing Emails ourselves. This is what I have done (I replaced some names for privacy reasons):
I created a private key:
Code:
/usr/local/amavisd/amavisd genrsa /var/dkim/SEL1_DKIMkey.pem
Changed permissions for the user running amavis:
Code:
chown -R vscan.vscan /var/dkim/ && chmod -R 700 /var/dkim
Editet my /etc/amavisd.conf:
[Code]....
Send Testmails to sa-test@sendmail.net and check-auth@verifier.port25.com . They automatically create answer mails considering signature information.
Send emails to my external account at some other provider.
The problem is that amavis is not signing the mails. Both automatic test emails reported, that the mail had not been signed. The mail to my external account also did not contain any DKIM information.
"My" system:
Code:
# uname -r & cat /etc/issue
2.6.9-89.0.11.ELsmp
Red Hat Enterprise Linux AS release 4 (Nahant Update 8)
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Jun 22, 2011
I am running or was running a mail server. It used the titles service to scan emails but keeps bringing up a temporary failure right. But when I run the command 'amavisd' It brings up this error here:
[Code]...
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Mar 23, 2010
start working with SA+Amavis+clamd+postfix+dovecot.will be my filter:spamassassin+amavisd-new+clamd. 1 Server will be my mail server: postfix+dovecot. Like u see, the emails from the outside reach first the filter, latter the mailbox. Now, I have seen in my log files, that if I receive a email to a "unknown user", the filter doesn't detect this and process the email and send it to the mail server. Exist a way to setup the filter to first check if the user exist and them apply all hard work and latter send the email to the mail server
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Nov 4, 2009
I am not sure why it does not install, it hangs(hangs for 10 minutes) and the only way to get out of it, is to ctrl-c, and then it gives error yum install amavisd-new
[Code]....
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Sep 16, 2009
I have inserted ASUS NX1101 in CentOS. But it not detecting. Card is a new one. What to do?
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Dec 22, 2010
I've got brand new Dell Optiplex 380 (Intel E8400 chipset) that I wanted to use to test new KVM virtual environment, after installing Centos 5.5 - (64bit) I'm not getting any further than "egrep '(vmx|svm)'color= always /proc/cpuinfo" as it is not showing that CPU is capable of VMX. Now this URL... says that it is perfectly up to what I want from it. I specifically installed W2k3 server R2 on the same box previously to run these apps, just to be sure URL...everything was nice and green and according Windows and those apps perfectly VMX-capable, but still CentOS isn't recognizing VMX capabilities.BIOS settings are all enabled...
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Sep 23, 2009
I try to install CentOS 5.3 for the first time. The installation of system is completed successfully, but the computer isn't detected the installation of CentOS after rebooting and I have an error Non-System Disk or Disk Error Replace and strike any Key When Ready on starting. Does the hard disk have error and it should replace it? If the hard disk have errors, how the system CentOS could take hold?
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Dec 18, 2010
I have loded centos 5 on vertual machine, my host machine is windows xp and has two NIC cards working perfectly well
1) realtek RTL 8139 family PCI fast eathernet NIC
2) realtek 8169/8110 family gigabite ethernet NIC ( ONBOARD)
but both of them are not getting detected by CENTOS
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May 7, 2009
I am attempting to use a serial trackball in CentOS 5.3 and have run out of ideas. The mouse is connected to COM2 (/dev/ttyS1). I have tried to configure it through xorg.conf using every protocol I could find including "auto" and tried the same again using "inputattach". The mouse communicates at 1200 baud, so I've tried using stty to set the port to that baud rate and still no luck. Is there a test tool that can be used to see if the serial connection is functioning? If not, are there any other ideas?
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Sep 8, 2009
Whats the best way to detect & install new hardware in CentOS5.3 when you don't have a working network connection. I've tried to search the wiki & forums on this site as well as the supplied help files for help in detecting & installing new hardware but wasn't able to find anything
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Oct 15, 2009
Cent Os 5.3 64bit dosen't recognise the network card ASUS NX110113f0:1023 (rev41)here are some details about the system,
# lspci | grep ther
02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 02)
[code]....
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Mar 9, 2010
I just want to define a few soft whitelist items in 50-user.
Something like this (the example is from 20-debian_defaults):
'noreply@freshmeat.net' => -3.0,
'owner-technews@postel.acm.org' => -3.0,
[code]....
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May 29, 2010
broadband cable -> Linksys RTP300 router -> Firestarter -> Ubuntu 10.04 Desktop
sshd and vnc installed and working fine when enabled but the only way is to add my routers ip as a trusted address or add individual port entries for 192.168.15.1... on the linksys i, of course, have the appropriate ports forwarded to the Ubuntu static ip, so basically anyone can try to connect... how can i make the router forward the internet ip of the person trying to connect, so I can lock it down better?
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Jul 4, 2011
I am attempting to write a server application in C on a linux machine which listens for TCP connections and transfers data. I am trying to detecton the server side when the connection is broken. The closest thing that I got to work was looking at the return value from sending data. For example the server�s job is to mainly read data from the socket but to test if the connection is still up the server sends data periodically back to the client. I look at the return value from send() to determine if the connection is broken e.g.
Code:int ret = send(session->clientSocket, &data[sentCnt], count - sentCnt, MSG_NOSIGNAL)I found that this does not immediately return an error when the connection is broken. The reason for this is because even though the connection is broken send() is still successful because it is able to put it on the network buffer. To fix the issue I did the following things;
Code:
//set send timeout
struct timeval timeout;
[code]...
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Jul 11, 2010
Here comes my problem: I am installing a new unit with Fedora Core 5,I will use it as my internet server. I need one additional PCI network card but it is not detected during installation.what shall I do?
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Apr 28, 2011
I configured a mail server using Squeeze's latest packages with Posfix + Amavisd-new + Clamav + Spamassassin, but apparently the latter is not using the system configuration files, and I cannot figure out why.Running amavis in debug mode I get the following:
# /etc/init.d/amavis debug
Trying to run amavisd-new in debug mode...
Apr 28 16:01:08.291 [1427]: starting. /usr/sbin/amavisd-new at *******************
[code]....
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Mar 31, 2011
I am trying to built a mailserver using Sendmail + cyrus + amavisd + TLS authentication. All programs used are the latest versions shipped with OpenSUSE 11.4 I have set-up successfully sendmail+cyrus and I can send e-mail anywhere without a problem using authentication. But when I try to integrate amavisd-milter mail delivery hangs at 63% and the following message appears in /var/log/mail
[code]....
I have also uninstall all involved programs, deleted all conf files and re-installed them but alas without any success. The same configuration was used at least once with almost all previous SuSE/openSUSE versions since 1998.
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Oct 31, 2010
So basically what I am trying to do is install Ubuntu 10.04 on a Dell Poweredge 2600 server. Right now I dont care wither I get the server version or the desktop version, I just need to get it on their. this is what I have run into. When installing the regular Ubuntu 10.04 desktop for 32bit, the server just locks up on the very first ubuntu install screen and the keyboard lights just start blinking non stop. When I use the server version, the server get to the Detecting Network Hardware and locks up at 94% and the keyboard will also start blinking nonstop. I have looked all over for an answer to this problem and have yet to find one. This guy figured out how to make it work but he never mentioned what version he was using. [URL]..
On this server I have 6 HDs, 5 of them are RAID 0 with 1 Hot Spare. I have also tried using the ubuntu-10.04.1-alternate-i386.iso.torrent and still had the same problem. I have spent the last 3 days searching all over google and the forum to an answer but had no luck.
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Aug 14, 2010
I suspect that I have viruses in my ubuntu environment.What to do now?
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Sep 8, 2011
Since it makes Windows apps work there is a possibility that also its viruses will work. I searched and a few sites mentioned such things, but none confirmed this issue.
In Wikipedia, it said this: "Because of Wine's ability to run Windows binary code, concerns have been raised over native Windows viruses and malware affecting Unix-like operating systems. Wine can run much malware, but programs running in Wine are confined to the current user's privileges, restricting some undesirable consequences. This is one reason Wine should never be run as the superuser."
Here is the link.
As far as I know, I cannot install unless I'm a root user, and I keep my Terminal as a root user opened for hours. Also, if I were to install windows apps under Wine, I'll have to log in as a root!
So let me line the questions here:
1- Does Wine activate Windows viruses?
2- Can viruses run on their own while I log in as root in Terminal or while installing apps (whether under Wine or not)?
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Mar 28, 2010
I have ClamTk on Ubuntu 9.10 and I wonder if it REALLY works effectively against viruses.
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Mar 5, 2011
i know linux is very unlikely to get viruses and malware, but what about trojans?
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Jul 18, 2011
I know Slackware probably doesn't require too much protection from viruses or spyware, but I'm wondering if there's anything I can do to help protect it (other than Common Sense).
I ask this for 2 reasons:
1. I'm Paranoid
2. Every now and then I mistype a website I go to and it takes me to a completely different website which frightens me because of my paranoia.
So is there anything I can do to help protect Slackware, and in the rare case I get a virus is there a way to remove it directly?
Is it also possible to use Slackware (currently Master drive) to remove a virus on Windows (slave drive)?
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May 25, 2010
I am a very new Linux user. My first OS is Fedora 12, which I just recently installed into my laptop. So far, I am thoroughly enjoying it. I do have a question bugging my mind though. Linux systems are known to be very safe from viruses, mainly due to programmers targeting the Windows platform. In Windows, common methods for virus infections are from infected executable files, external drives autorun... ETC.
Now my question is how do viruses spread into a Linux system? And with so few viruses known to exist for Linux systems, do I really need to be aware and take precautions for viruses (For example in Windows, disabling autorun function for external drives)?
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Apr 7, 2010
How can i do this? I have both clamav and Bitdefender scanner for unices and I need to scan a shared folder, but it seems none of the AV programs understand samba dirs (ie. smb://compname/sharedfolder/)
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Sep 20, 2010
I read some articles about viruses in Linux and about some antiviruses which work in Linux and delete Windows viruses but I still don't understand: is there any antivirus which specializes in Linux viruses? Even though there are very little of Linux viruses, I know.
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