What is a Firewall?
A firewall is a security tool that filters and controls network traffic. It protects systems from unauthorized access and cyberattacks by enforcing security policies.
How does a Firewall work?
Firewall technologies include:
- Packet filtering
- Stateful inspection
- Proxy firewalls
- Next-Generation Firewalls (NGFW): With IDS/IPS and deep packet inspection
Benefits of Firewalls:
- Blocks malicious traffic
- Regulates access to systems
- Protects sensitive data and applications
- Can be combined with VPNs for secure remote access
Challenges of Firewalls:
- Misconfiguration can lead to security gaps
- May affect network performance
- Does not protect against insider threats
Use Cases:
- Enterprise and industrial networks
- Data centers
- Cloud applications
- Protection of critical infrastructure