Firewall Management

Your firewall is the gatekeeper of your server security. It acts as a protective barrier between your trusted data and the outside internet, automatically blocking malicious traffic and preventing unauthorized access.

Whether you use our Cloud Firewall, a hardware firewall, or software like CSF or Windows Firewall, proper configuration is essential.

Firewall Management Articles

27 results

This collection of guides will empower you to choose the right firewall, configure your rules, and manage ports to keep your infrastructure secure.

Adjusting LFD Notifications for Load Levels

LFD monitors server security and load levels. Adjust PT_Load_Level in WHM to prevent false positives by matching it to the server’s CPU cores.
Read more: Adjusting LFD Notifications for Load Levels
Allowing Port Access by IP Address in CSF

Each open firewall port is a potential vulnerability. It’s vital to keep all ports closed except for those essential for your server’s applications.
Read more: Allowing Port Access by IP Address in CSF
Backing Up Your CSF Firewall Configuration

Before modifying CSF firewall settings, backup the current configuration. It ensures site protection if changes lead to unexpected issues, aiding troubleshooting.
Read more: Backing Up Your CSF Firewall Configuration
Blocking IP Addresses Using Windows Firewall

Your Windows server’s firewall guards against malicious attacks, enforcing rules to block unauthorized access and potentially harmful IP addresses.
Read more: Blocking IP Addresses Using Windows Firewall
Blocking Traffic by Country in the CSF Firewall

Using CSF in WHM, filter and manage traffic by country. This helps with bandwidth, security, and content access but requires careful consideration.
Read more: Blocking Traffic by Country in the CSF Firewall
Cloud Firewall

Use our Cloud Firewall to block threats before they reach your server. Learn to configure rules, manage ports, and enhance your cloud security.
Read more: Cloud Firewall
ConfigServer eXploit Scanner (CXS): your website’s security watchdog

CXS is your server’s watchdog, scanning for malware, quarantining threats, and monitoring files in real-time to keep your website secure.
Read more: ConfigServer eXploit Scanner (CXS): your website’s security watchdog
ConfigServer Security & Firewall (CSF)

Harden your Linux server with CSF. Our guides show you how to install, configure, and manage this powerful firewall and security application.
Read more: ConfigServer Security & Firewall (CSF)
Configuring Your Cloud Firewall

Firewalls safeguard servers by filtering network traffic based on rules. All Liquid Web servers have a software firewall; Linux servers typically have CSF, while Cloud servers can add an extra layer of protection with a Cloud firewall. It’s advisable to use both CSF and the Cloud firewall for enhanced security.
Read more: Configuring Your Cloud Firewall
CSF Country Blocking Dependency – Maxmind

Learn about changes to CSF Country Blocking requiring that a key is obtained. Then, there is a value in /etc/csf/csf.conf that needs to be updated with the free license key.
Read more: CSF Country Blocking Dependency – Maxmind
Find (View) Default Zone for Firewalld on CentOS 7

Zones enhance an administrator’s capability to define trusts and restrict network traffic. Learn how to find the default zone in Firewalld on CentOS 7 via the command line.
Read more: Find (View) Default Zone for Firewalld on CentOS 7
Getting Started with Configserver’s ModSecurity Control Plugin

Use the ConfigServer ModSecurity Control (CMC) plugin in WHM to whitelist specific rules for a secure yet smooth-running site. Configure it with this article’s guidance.
Read more: Getting Started with Configserver’s ModSecurity Control Plugin
How to Start and Enable Firewalld on Fedora 23

As a matter of following security best practices, you should protect your server with a firewall. Fedora 23 and CentOS 7 come with firewalld, an alternative to iptables.
Read more: How to Start and Enable Firewalld on Fedora 23
Installing Configserver’s ModSecurity Control Plugin on Your Server

Protect your web apps using ModSecurity WAF. Learn how to verify your Apache installation, install rules, and add the ConfigServer CMC plugin to WHM.
Read more: Installing Configserver’s ModSecurity Control Plugin on Your Server
Malware Scanning with ConfigServer eXploit Scanner (CXS)

Actively scan file uploads for malware with CXS. Learn to install, configure, and use this tool to block exploits before they can infect your site.
Read more: Malware Scanning with ConfigServer eXploit Scanner (CXS)
Manage your server’s firewall with iptables

iptables can act as your server’s gatekeeper, deciding which network traffic is allowed in, out, or through your server.
Read more: Manage your server’s firewall with iptables
Opening and Closing Firewall Ports

Protect your server by managing network traffic. Learn how to safely open and close incoming and outgoing TCP firewall ports using CSF in WHM.
Read more: Opening and Closing Firewall Ports
Restoring CSF Firewall Configuration from a Backup

Protect your server by reverting unwanted changes. Learn how to safely restore your CSF firewall configuration from a backup in WHM’s Firewall Profiles.
Read more: Restoring CSF Firewall Configuration from a Backup
Scoping Ports in Windows Firewall

Security is paramount in today’s digital landscape. Scope Windows Firewall ports to allow only trusted IP addresses for added protection.
Read more: Scoping Ports in Windows Firewall
Setting Up ModSecurity Configuration

Customize ModSecurity’s global settings using the ModSecurity Configuration. Learn to enable the settings you need in this guide.
Read more: Setting Up ModSecurity Configuration
Unblocking an IP Address or Opening a Port in the Firewall

If an IP address has been blocked by the firewall on your cPanel VPS server unexpectedly, you can quickly resolve the issue yourself with just a little help.
Read more: Unblocking an IP Address or Opening a Port in the Firewall
Using AnyConnect with your hardware firewall

A corporate VPN secures remote access, encrypts data, prevents cyberattacks, and ensures compliance. It also enhances server management by restricting access to private networks via a secure connection.
Read more: Using AnyConnect with your hardware firewall
Using CSF Firewall to Mitigate DoS/DDoS Attacks

Mitigating DoS and DDoS attacks is challenging. There’s no way to prevent them, but we can reduce their impact and, in extreme cases, take the server temporarily offline.
Read more: Using CSF Firewall to Mitigate DoS/DDoS Attacks
Using FirewallD on CentOS 7

Secure your CentOS 7 server with FirewallD. Learn how to easily start, stop, enable, disable, and check the status of this dynamic firewall via SSH.
Read more: Using FirewallD on CentOS 7
What is a Firewall?

A firewall is like a security guard for your server. It checks all network traffic against a list of rules to block unauthorized access.
Read more: What is a Firewall?