How Brute Force Attacks Target Firewalls

In this blog, we’ll explore what brute force attacks are, how they target firewalls, and, most importantly, actionable steps you can take to safeguard your systems.

In today's digital landscape, cybersecurity threats are constantly evolving, and one of the most persistent dangers organizations face is brute force attacks. These relentless attempts to breach firewalls by systematically guessing login credentials can compromise sensitive data, disrupt operations, and leave your network vulnerable to further exploitation. Whether you're an individual, a small business, or a large enterprise, understanding how to defend against brute force attacks is crucial for maintaining a secure infrastructure.

How Brute Force Attacks Target Firewalls

Brute force attacks exploit vulnerabilities in firewalls to gain unauthorized access to your network. Here’s how these attacks typically work:

• Targeting Open Ports: Attackers often scan firewalls for open ports, such as those used by SSL VPNs or RDP (Remote Desktop Protocol), which are common entry points for organizations. Open ports provide an exposed entryway that attackers can exploit.
• Automated Credential Guessing: Using automated scripts or botnets, attackers systematically attempt to guess login credentials by trying thousands or even millions of combinations in rapid succession. Weak or commonly used passwords are especially vulnerable.
• Password Spraying: Attackers may use password spraying techniques, where they try a small number of common passwords across many accounts to avoid detection by lockout mechanisms.
• Exploiting Misconfigurations: Firewalls that are not properly configured—such as those lacking access restrictions or strong authentication protocols—are prime targets for brute force attacks.
• Gaining Persistence: Once attackers breach the firewall, they can establish persistence within the network by installing malware or creating backdoor access, enabling them to further exploit the system at their leisure.

Understanding these tactics is essential to implementing the right defenses to keep your systems secure.

How to Strengthen Your Defenses

Implementing robust measures can make a significant difference in defending against brute force attacks. Here are three essential strategies to enhance your network security:

• Multi-Factor Authentication (MFA)
  An extra layer of security ensures that even if passwords are compromised, unauthorized access can be prevented. MFA provides a crucial defense against brute force attempts by requiring multiple forms of verification.
• Geo-IP Filtering
  Restricting access from high-risk regions minimizes exposure to cybercriminals. Geo-IP filtering is an effective way to block traffic from locations known for malicious activity, reducing potential vulnerabilities.
• Trusted IP Restrictions
  By allowing only approved IP addresses to access sensitive systems, you can significantly reduce the risk of brute force and password-spraying attacks. Trusted IP restrictions create a secure perimeter for your network.

Take a Deeper Look

For a deeper look, check out latest webinar recording, where Logically’s VP of Cybersecurity, Zack Finstad, and Network Security Manager, Kyle Sandy, break down essential strategies to fortify your network. Learn how multi-factor authentication (MFA), geo-IP filtering, and zero-trust frameworks can defend against phishing, brute force attacks, and other cyber threats. Plus, explore best practices for securing remote access in today’s hybrid work environment. 

Or copy and paste this link into your browser: 

https://www.brighttalk.com/webcast/18405/634267?utm_source=Logically&utm_medium=brighttalk&utm_campaign=634267

  Relevant Resources  

Upcoming Webinar - February 20th: Register Now 

Blog: Firewall Upgrades That Increase Protection Against Cyber Threats

Blog: Why Old Firewalls Are No Match For New Threats

Webinar: ZTNA MythBusters: Dispelling the Misconceptions of Zero Trust

Webinar: Taming the Cyber Threat Landscape