On a CentOS Linux 7 server you can use any one of the following tool to manage hostnames:
So you’ve discovered that all of a sudden your server load has shot and your email inbox is getting filled up with hundreds of bounce backs. You sir may be spamming! Now if you are a spammer, this isnt really much of a shock. Continue reading
Linux Malware Detect (LMD) is a malware scanner for Linux released under the GNU GPLv2 license, that is designed around the threats faced in shared hosted environments. It uses threat data from network edge intrusion detection systems to extract malware that is actively being used in attacks and generates signatures for detection.
In addition, threat data is also derived from user submissions with the LMD checkout feature and from malware community resources. The signatures that LMD uses are MD5 file hashes and HEX pattern matches, they are also easily exported to any number of detection tools such as ClamAV. Continue reading
Rootkit Hunter (rkhunter) is a Unix-based tool that scans for rootkits, backdoors and possible local exploits. This guide explains how to install and configure RKHunter on CentOS 5,6 or 7.
Rootkits are self-hiding toolkits secretly installed by a malicious intruder to allow that user to gain access to the server. Rootkit Hunter offers protection by comparing SHA-1 hashes of important files with known good ones in a online database as well as:
The ConfigServer Security & Firewall is a popular open source Stateful Packet Inspection (SPI) firewall, Login/Intrusion Detection and Security application, compatible with most Linux servers. Continue reading
On Linux systems there are a few temporal directories used for storage, like /tmp, /var/tmp and /dev/shm. This directories are used to store temporary files from different services such as Apache, MySQL, etc.
However, sometimes this directories are also used by crackers and script kiddies to store malicious/malware and virus executables. This malicious scripts can be an open door to send spam, exploit the system as root or spread viruses over the network.
This tutorial will show you how to secure /tmp partition, and also the /dev/shm directory. Continue reading
c99 Shell Scripts are one of the main headache for almost all cPanel server administrators even though they use mod_security and all.
The c99 php (Hypertext Preprocessor) shell script is an awesome piece of hacking script. The only limitation of it being that it needs an unsecured uploader in order to get it uploaded and then the execution part is a piece of cake.
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A step by step paper how to secure linux server with cPanel/WHM and
Apache installed. By default, linux is not secured enough but you have
to understand there is no such thing as “totally secured server/system”.
The purpose of this paper is to understand how to at least provide some
kind of security to the server.
Let’s start Continue reading
Here are some useful things to know for managing an Exim 4 server. This assumes a prior working knowledge of SMTP, MTAs, and a UNIX shell prompt. Continue reading