Definition
A screen subnet firewall is a network security architecture that provides an additional protection layer by placing a subnet between two firewalls. This helps prevent the risks of unauthorized access, malware, viruses, and other cyber threats.
Difference Between Screened Subnet Firewalls and Screened Host Firewalls
A screened subnet firewall classifies three subnets using two screening routers, which means an attacker has to bypass two filtered routes to access a network.
On the other hand, a screened host firewall uses one screening router for the two subnets. The DMZ host is the only thing that prevents unauthorized access, making it less secure than the former.
Pros
- Safeguards systems from potential internet cyberattacks.
- Protects the internal network from external threats.
- Facilitates more granular control of network traffic.
- Reduces the chances of cyberattacks spreading to other parts of the network.
Cons
- Expensive and complex than other firewall configurations.
- It can cause network congestion or latency.