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

Firewall Management Articles

13 results

This collection of articles will guide you through the different types of firewalls and how they function to protect your server.

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 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)
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
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
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
Every Liquid Web server includes a software firewall to safeguard against malicious connections. Firewalls assess incoming traffic against predefined rules. Trusted services, like email, use specific ports with their own rules. Keeping only essential ports open is crucial to security.
Read more: Opening and Closing Firewall Ports
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 FirewallD on CentOS 7
FirewallD provides protection by using firewall zones with varying degrees of trust defined in your zone profiles. FirewallD allows for changes to be made without having to restart the entire firewall, though it is important to make sure that the daemon and the firewall in kernel are in sync.
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?
What Is the Login Failure Daemon (LFD)?
The Login Failure Daemon (LFD) monitors and blocks brute-force login attempts on your server. WHM allows you to configure and track LFD settings.
Read more: What Is the Login Failure Daemon (LFD)?
Windows Firewall
Secure your server with Windows Firewall. Our guides show you how to open ports, manage IP rules, and configure this built-in security tool.
Read more: Windows Firewall