Network Firewall

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A Network Firewall is a security device used to prevent or limit illegal access to private networks by using policies defining the only traffic allowed on the network; any other traffic seeking to connect is blocked.
Network firewalls are located at the network’s front line, serving as a communications link between internal and external networks.

Three Main Concepts Of Zero Trust

Enforce access privileges to reduce risk

Network firewalls that only allow traffic that has been expressly permitted to pass—”deny by default”—can support Zero Trust security architectures.

Limit access to sensitive resources

Network firewalls can prevent unauthorized users from accessing sensitive and confidential data, such as patient data and financial information.

Protect the network from cyberthreats

Attacks caused by malware or threats propagated by malicious websites visited by users within the organization can be blocked and prevented by network firewalls.