A firewall is a part of a computer system or network that is designed to block unauthorized access while permitting authorized communications. It is a device or set of devices that is configured to permit or deny network transmissions based upon a set of rules and other criteria.
Firewalls can be implemented in either hardware or software, or a combination of both. Firewalls are frequently used to prevent unauthorized Internet users from accessing private networks connected to the Internet, especially intranets. All messages entering or leaving the intranet pass through the firewall, which inspects each message and blocks those that do not meet the specified security criteria.

163 products

368.–was 639.–1
Cisco ASA 5506-X
SonicWall TZ-400 Total Secure
RED 15 Appliance - mit multi-region power adapter
Sophos RED 15 Appliance - mit multi-region power adapter
Zyxel USG40W inkl. 1 Jahr Service-Bundle
Zyxel USG60 inkl. 1 Jahr Service-Bundle
Zyxel USG110 inkl. 1 Jahr Service-Bundle

Discussions about Firewalls