Sendmail vs Postfix - both are Mail Transfer Agents (MTA) used for sending mail from a Linux host. The primary concerns when deciding which MTA to use come down to performance, ease of use, and security. Postfix is the most commonly used MTA, for good reason. It is a security oriented mail server … [Read more...] about Sendmail vs Postfix – Mail Transfer Agent Comparison
PowerShell AD Group Members
This article will demonstrate how to use PowerShell for AD Group Members management. While it can be easy for beginners to use the Active Directory Users and Computers tool, PowerShell can provide more power, automation, and efficiency in performing identity management functions including group … [Read more...] about PowerShell AD Group Members
How to Install Apache for Linux
This article will demonstrate how to install apache for linux. Specifically, this article will focus on how to install apache on RHEL 8.x. Apache is otherwise known as httpd, so these instructions are the same for installing httpd on linux. These instructions assume you have root access to the … [Read more...] about How to Install Apache for Linux
Firewall Redhat
This article will demonstrate how to manage a firewall on a Redhat server. Firewall functions that will be covered include how to check the firewall status, start, stop, enable, and disable it. The examples below were performed on RHEL 8.x. The default firewall on RHEL 8 is firewalld and is … [Read more...] about Firewall Redhat
How to Install ColdFusion on Linux
This article will focus on how to install ColdFusion on Redhat Linux (RHEL), but the general principles will work for any flavor of linux including Ubuntu and Debian based systems. Follow these steps. The output of the startup command should be as follows: The installation is … [Read more...] about How to Install ColdFusion on Linux
Ubuntu unattended upgrades
Presumably, you have discovered this article because you are either searching for a way to automatically apply security upgrades to your Ubuntu servers or you have discovered a security package was upgraded without you knowing it. In my case, it was the latter. If you subscribe to a SOC (security … [Read more...] about Ubuntu unattended upgrades
openssl verify – Verify a certificate and certificate chain
Use the openssl verify function to verify a certificate chain. To verify a certificate chain you must first get the certificate chain to verify against. openssl verify certificate chain To verify a certificate and its chain for a given website with OpenSSL, run the following … [Read more...] about openssl verify – Verify a certificate and certificate chain
NetScaler ADC configuration history
This article will demonstrate how to view the Citrix NetScaler ADC configuration history and compare it with the current running configuration. You may need to review the ADC configuration commit history for any number of reasons including but not limited to an unexpected commit that reverted or … [Read more...] about NetScaler ADC configuration history