Category: Linux

Linux

LDAP Installation on CentOS 7 / RHEL 7

Aug 12, 2015 by Grzegorz Juszczak 0 Comments , , , , , , ,

LDAP stands for Lightweight Directory Access Protocol. As the name suggests, it is a lightweight protocol for accessing directory services, specifically X.500-based directory services. OpenLDAP is a free, open source implementation of the Lightweight Directory Access Protocol (LDAP) developed by the OpenLDAP Project. It is released under its own BSD-style license called the OpenLDAP Public License.

In this tutorial we will show you, how to install OpenLDAP server on CentOS 7 / RHEL 7 and create basic configuration in a few simple steps:
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Linux

vsftpd installation on CentOS 7 / RedHat 7 with selinux

May 9, 2015 by Grzegorz Juszczak 11 Comments , , , , , , ,

vsftpd (Very Secure File Transfer Protocol Daemon) is lightweight, fast and default FTP server daemon for rpm-based Linux distributions (CentOS/RHEL/Fedora).

We will install vsftpd on CentOS7 with selinux enabled in Enforcing mode.
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Linux, Security

Detect SSH Brute Force Attack and Locate Attacker

Feb 19, 2015 by Grzegorz Juszczak 2 Comments , , , ,

Brute Force Attack consists of systematically checking all possible passwords until the correct one is found. If the host is exposed directly to the Internet (WAN) and SSH service is running on the host, it becomes a subject of constant brute force attacks performed by automated scripts like hydra.

To detect SSH brute force attempts on systems running systemd service manager (CentOS7/Fedora21/RHEL7), you can use journalctl command with parameters:
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