========================================================== ==========
-Create a user group and a user named amaivs. You can also use other names to run AMAVISD.
-Create the/var/amavis directory, change the owner to amavis, and change the Directory attribute to 750, that is:
Mkdir/var/amavis
Chown amavis: amavis/var/amavis
Chmod 750/var/amavis
-Copy/usr/tmp/amavisd to/usr/local/sbin/, set the attribute to 755, and set everyone to root.
-Copy/usr/tmp/amavisd. conf to/etc/, set the attrib
Practices
0. linux anti-virus software clamav
In the test environment, you can use the clamscan command to test (very slow)
To start the clamd service in the production environment, use clamdscan to scan files (very fast, within milliseconds)
Note: It is best to add a scheduled task to update the virus database freshclam every day.
Solution after scanning the virus:
A. (recommended) Use imagecreatefromjpeg and other methods to Read File Infor
remarks
Operating System (OS) Ubuntu Open Source SystemThe message transmission proxy (MTA) Postfix uses the latest version 2.5.1.The database/directory service MySQL can be openLDAP or NetScape LDAP. This document is based on MySQL.Email Delivery proxy (MDA) maildrop supports filtering and powerful functionsThe ExtMan Web account management backend supports unlimited domain names and unlimited users.The POP3 server Courier-IMAP only uses the pop3 part, which is sufficient for most enterprises.
I tried avastforwin anti-virus software for a while before and found that this software is okay. Although many people say that installing anti-virus software on linux does not make much sense, it may be true for the time being. However, there are still many people who are not at ease. install some open-source anti-virus software such as clamavantivirus, and many new users do not like the graphic interface. The avastforlinux family version was inadvertently discovered. Although serial numbers are
a lot of time and effort. In Linux, a security patch may be released in minutes or hours after the vulnerability is discovered. In the KDE and Gnome desktop environments, small software with real-time detection and updates is provided, I always recommend that you keep these mini programs running, so that you can install them in time once there are useful updates and releases. Do not suspend Security Updates. There must be a reason for its release.
6. Installing the virus protection software is
Calculates the MD5 value in the/etc directory for the file to be tampered with, following the command:find/etc/-maxdepth 1-type F | Xargs-n1 md5sum>/root/etc_sum-$ (date +%f). logThe same truth,We can/usr/bin/usr/sbin//usr/local/bin/root/bin and so on the important directory of the file checksum is calculated once, so that the regular execution of the command, generate a new checksum, Compare the generated log file with the original md5sum.log by using the diff command.If there is a change, the
machineDu-sh/bin/netstat2.0m/bin/netstatDu-sh/bin/ps2.0m/bin/psSome commonly used binary files repair, found that the exception process was killed after the restart, so install antivirus software ClamAV and rootkit Hunter to perform a full scan, thus confirming all infected files, delete those files can be deleted and kill the abnormal process again, There are no more problems with rebooting.4. Impact Scope AssessmentSince the machine is only a stand
Original address: https://www.aolens.cn/?p=1018
1,extmail OverviewExtmail solution is an e-mail system solution based on excellent open source software, with core components including Postfix, Amavisd-new, ClamAV, Extmail, Extman, Courier series Software. is a relatively full-featured free e-mail system.And Extmail is a Perl language, for large-capacity/isp-level applications, free high-performance webmail software, mainly including Extmail, Ext
01. Install CentOS with minimal installation Select Development Tools option for system installation, root password using 16-bit02. Modify the SSH Ports/etc/ssh/sshd_config port 1433 (1433 is Microsoft's SQL connection port)03. Turn off root telnet mode/etc/ssh/sshd_config (Permitrootlogin No)04. Create jumper user, log in to Linux with jumper user, and su root switch to root for software installation and other work05. Use the feature account for service deployment to avoid mis-operation at depl
Label: extmail amavis ClamAV dspam
Fault description:
An error occurred while receiving the email.
"Delivery temporarily suincluded: lost connection with 127.0.0.1 [127.0.0.1] while sending rcpt"
After checking that the temporary directory of amavis is created full of subdirectories, ext3 imposes a limit on the number of first-level subdirectories by 32000.
After deletion, it is restored.
Check the $ tempbase settings in amavisd. conf.
is discovered, patches can be released in hours or minutes. Both KDE and Gnome support Panel update programs. Some people think that frequent updates are too troublesome, but it is recommended that you do not reject Security Updates. These updates must be released for some reason.
Install anti-virus
Do not think that the possibility of system problems caused by viruses is minimal. I suggest you use a robust Virus defense tool, such as ClamAV, so that
themesHttp://www.gehrigal.net/projects/webmin_theme/Iptable firewall Webmin ModuleHttp://www.niemueller.de/webmin/modules/iptables/IMAP admin modules for WebminHttp://www.nwe.de/develop/BitDefender remote admin (manage BitDefender Antivirus/antispam for Linux servers .)Ftp://ftp.bitdefender.com/pub/linux/RemoteAdmin/webmin/Wbmclamav (A Webmin module for ClamAV)Http://wbmclamav.labs.libre-entreprise.org/Domainrobot (A Webmin module for ordering and ad
is good. And Skype.
Security and Privacy 1) on-the-fly encryption. Http://sd4l.sourceforge.net/
2) VPN access. Sudo apt-Get install network-Manager-PPTP
3) onion routing. The most famous of this software is the tor I mentioned in the article. The software that can bypass gFW. (SUDO apt-Get install tor-geoipdb)
4) firewall. Sudo apt-Get install gufw
5) anti-virus software clamav. Sudo apt-Get install clamtk
System Tool 1) liveusb creator. Do you wan
time:Access time:Size: 17254 bytes, 16.870 KBMD5: e2fc361009ee1ea92eb5f0626e13b620Status: finishedcomplete scanning result of "msinfo.exe", received in virustotal at 06.10.2007, 16:20:52 (CET ).
Antivirus
Version
Update
Result
AhnLab-V3
2007.6.9.0
06.08.2007
Win-Trojan/hupigon. gen
AntiVir
7.4.0.32
06.09.2007
No virus found
Authentium
4.93.8
05.23.2007
Cocould be a temporary upted Executable File
Avast
4.7.
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