Security

Encrypting files with GNU Privacy Guard (GPG) is one of the best known ways to protect your most critical data. If you have already followed our guide on creating a GPG key, you are now ready to encrypt files using your key, rendering these files readable only to people you have designated. Most Often Used Read More >

Antivirus, anti-virus, AV, or anti-malware scanners protect users from uploading and using malicious data. While your choice of Linux operating system (OS), or distribution (distro), can change the probability for successful cyber attacks, it won’t negate it altogether. There are many free AV scanners for every OS including MalwareBytes, Bitdefender, and SUPERAntiSpyware. For cPanel server Read More >

We have many guides on securing common web hosting solutions: cPanel servers, bare cloud servers, and even the popular WordPress content management system (CMS). Each includes great technical controls for a proactive approach to defense in depth. However, nothing can detect and prevent everything. The only way to address this is to apply administrative controls, Read More >

UncomplicatedFirewall (UFW) is a command-line frontend iptables manager, similar to Firewalld and ConfigServer Security & Firewall (CSF). It’s beneficial to understand basic UFW commands since it’s pre-installed with many Ubuntu-based operating systems (OSs) including Linux Mint. Those configuring UFW for a desktop system who prefer not to use the CLI can use the GUFW GUI Read More >

Firewalld is a popular, lightweight command-line firewall for Linux server and desktop systems. We’re covered how to open necessary ports and services in Firewalld. We’ve also covered how to manage zones and more advanced Firewalld configurations. From the configuration guide, one of the most important related tasks for troubleshooting server access is how to disable Read More >

After you install Firewalld, the first thing you’ll likely want to do is open a port to connect with web applications on your Linux server. Only dhcp6-client and SSH are enabled by default. However, opening ports with Firewalld is an easy process. The first reason for this is the commands are straight-forward and easy to Read More >

Firewalld is a front-end manager that allows users to easily manage Linux firewall rules. It has become a popular option for securing Linux web hosting servers throughout the last few years. It’s installed by default on many newer Linux distribution releases. An unique advantage to the command-line interface (CLI) application is that ruleset changes are Read More >

Installing Firewalld grants a long list of commands available for configuring iptables rules. But there are a few tasks you should understand to get started with securing your server. Below we cover: Basic Firewalld CLI Commands Change Firewalld status Runtime Vs. Permanent Reload Firewalld Firewalld Zones Firewalld Services Firewalld Ports Panic mode Firewalld raw files Read More >

If you’re unable to connect to FTP, MySQL, or another service on your server, the port could be blocked by a firewall at many points before the actual software: Local workstation Local network router Virtual Private Network (VPN) or Proxy DNS Resolver Internet service provider (ISP) (e.g. Verizon) Web application firewall (WAF) (e.g. Sucuri) Content Read More >