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What is Graylog Sidecar?
Graylog Sidecar is a nimble configuration management framework for various log collectors called backends. The Graylog master node acts as a centrally located hub that contains the configurations of the log collectors. Sidecar can run as a service on both Windows and Linux servers.
Continue reading “How to Install Graylog Sidecar”
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In this article we will learn what the Network Time protocol (NTP) is and how to install it on the two Linux distributions most commonly used on Liquid Web’s servers. We will be focusing on using CentOS 7 and Ubuntu 18.04 servers, but the process is largely the same on other recent versions of each. Before we start, make sure we are familiar with using SSH (Secure Shell) as we’ll need it to connect to the server. Here’s a link to one of our articles on the basics of SSH if you are unfamiliar with its usage.
Continue reading “How to Install and Configuring NTP on CentOS and Ubuntu”
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What Is Fail2Ban?
Fail2ban is an open-source software that actively scans the servers log files in real-time for any brute force login attempts, and if found, summarily blocks the attack using the servers firewall software (firewalld or iptables). Fail2Ban runs as a background process and continuously scans the log files for unusual login patterns and security breach attempts.
Continue reading “Install Fail2Ban On CentOS 7”
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In this article, we will be reviewing the Apache Service Status. Sometimes checking the performance of a server can be difficult. Apache has built-in utilities that assist in monitoring the usage and performance of Apache. Apache Status also provides information that aids in performance auditing and control tuning.
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In this article, we discuss how to start and enable firewalld. It is highly
recommended that you have a firewall
protecting your server.
- These instructions are intended specifically for enabling and starting Firewalld CentOS 7.
- I’ll be working from a Liquid Web Self Managed CentOS 7 server, and I’ll be logged in as root.
Continue reading “How to Start and Enable Firewalld on CentOS 7”
Reading Time: 2 minutesSystemd is is an init system used by several common Linux Distributions which has gained popularity since 2015. A Linux init system is the first process or daemon started on a system after the initial boot process, and manages services, daemons, and other system processes. Systemd is comprised of unit files that contain the initialization instructions for the daemons which it controls. While many portions of a system can be managed with systemd, this article will focus on managing services. Continue reading “An Introduction to Managing a Linux Server with systemd”
Reading Time: 2 minutesFTP (File Transfer Protocol) is one of the most popular methods to upload files to a server. There exist a wide array of FTP servers, such as vsftpd, you can use and FTP clients exist for every platform.
Essentially no matter what OS you use you can find an easy to use FTP client, so it makes for a great solution to transfer files. On CentOS based servers before you can connect via FTP you’ll have to setup an FTP server. Here we’re gonna setup vsftpd which is a great option since it has a focus on security and speed.
Continue reading “How to Install and Configure vsftpd on CentOS 7”
Reading Time: < 1 minutePostgreSQL supports many client authentication methods, but in this case we’re only going to concern ourselves with two: password and md5.
Continue reading “Change a Password for PostgreSQL on Linux via Command Line”
Reading Time: 2 minutesPostgreSQL supports multiple client authentication methods including: trust, reject, md5, password, gss, sspi, krb5, ident, peer, ldap, radius, cert, and pam. Here we’re only going to concern ourselves with two: ident and md5.
Continue reading “Change PostgreSQL Authentication Method from Ident to MD5”
Reading Time: < 1 minuteWhen connecting to PostgreSQL on Linux for the first time many admins have questions, especially if those admins are from the MySQL world. By default, when PostgreSQL is installed, a postgres user is also added.
If you run the command:
… you’ll see the postgres user.
Continue reading “What is the Default Password for PostgreSQL?”