A firewall is a security mechanism that controls and monitors network traffic based
on predetermined security rules, functioning both at the network level and the
application level. At the network level, it filters traffic based on parameters like IP
addresses, ports, and protocols, serving as a gatekeeper to protect the integrity of
the network.
At the application level, it scrutinizes the traffic directed to and from specific
applications, examining the content and context of the data packets to guard
against application-targeted threats. This integrated approach allows a firewall to
offer comprehensive protection, securing a network from a wide range of external
and internal threats.
Types of Firewall
Web Application Firewall WAF
Provides specialised protection for web applications by filtering and monitoring HTTP traffic, safeguarding against application-layer attacks like SQL injection and XSS.
Next-Generation Firewall NGFW
Offers advanced security features such as application awareness, integrated intrusion prevention, and threat intelligence, beyond traditional firewall capabilities.
Endpoint Firewall(Desktop Firewall)
Installed on individual devices to monitor and control network traffic, providing protection against attacks targeting specific endpoints within a network.
Reasons You Need a Firewall
Network Segmentation and Access Control
Firewalls enable you to segment your network into different zones, creating controlled access points. This separation prevents unauthorized users from gaining access to sensitive areas of your network and helps contain potential threats, limiting their ability to spread laterally.
Protection Against Cyber Threats
In today’s digital landscape, cyber threats are relentless and ever evolving. Firewall software act as a barrier, scrutinizing incoming and outgoing traffic to identify and block malicious content, malware, and cyberattacks. By analyzing data packets, firewalls ensure that only legitimate and safe information enters your network.
Prevention of Data Breaches
Data breaches can result in catastrophic financial and reputation damage. Firewall software plays a crucial role in preventing unauthorized access to your valuable data. By implementing strict access controls, they help safeguard customer information, proprietary data, financial records, and other critical assets.
Application Security
Firewalls equipped with application layer inspection capabilities are adept at detecting & blocking unauthorized access attempts and malicious activities targeting vulnerabilities in applications. These firewalls align with the Open Web Application Security Project OWASP guidelines to enhance security, and often include bot protection features to guard against automated threats.
Regulatory Compliance
Many industries are subject to regulatory frameworks that require stringent data protection measures. Firewalls aid in compliance by controlling access to sensitive data, maintaining audit trails, and ensuring that security policies align with industry standards and regulations.
Benefits
Network Firewall
Enhanced Network Security
Efficiently monitors & manages incoming & outgoing network traffic based on predefined security policies
Virtual Private Network Support
Integrates VPN capabilities for secure & encrypted remote access, facilitating safe & flexible connectivity for remote users.
Network Segmentation
Helps in segmenting the network, allowing for more controlled access and reduced risk of internal attacks.
Application Firewall
Web Application Security
Specializes in filtering & monitoring HTTP traffic to protect web applications from application-layer attacks like SQL injection & cross-site scripting XSS.
Customised Protection
Offers tailored defenses that can be adjusted to suit the specific requirements of different web applications.
Compliance & OWASP
Alignment Aids in adhering to security standards and follows the Open Web Application Security Project OWASP guidelines, ensuring robust application security.
Bot Protection
Application firewalls effectively block malicious bots involved in credential stuffing, scraping, and DDoS attacks, safeguarding web applications from automated threats that threaten security and user experience.
Factors to consider before buying NGFW
Security Controls
Ensure the firewall offers customizable security controls to match specific network requirements.
Advanced Security
Look for advanced threat protection features to defend against sophisticated cyber attacks.
Virtual or Cloud Environments
Check compatibility with virtualized or cloud-based infrastructures for seamless integration
Network Size and Performance
Consider the firewall’s capacity to handle your network’s size and performance needs efficiently
Support Options
Evaluate the availability and quality of technical support and customer service
DLP (Data Loss Prevention)
Verify the firewall’s ability to prevent sensitive data from leaving the network.
URL Protection
Ensure it can effectively block access to malicious or inappropriate websites
Application Control
Look for capabilities to control application use within your network
Deep-Packet Filtering
Confirm the firewall’s proficiency in examining detailed packet content for security threats.
Multi-Factor Authentication
Check if it supports MFA Multi-Factor Authentication) for enhanced security verification.
Sandboxing
Determine if it can isolate and analyze suspicious files in a safe environment.
Geo-Blocking
Assess its ability to block or allow traffic based on geographic locations.