The fail2ban tool in Linux monitors system logs for signs of attacks, putting offending systems into what is called "jail", and modifying firewall settings. It shows what systems are in jail at any given time, and requires root access to configure and view findings. It's generally used on Linux servers.
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Network-as-a-service (NaaS) is gaining momentum, providing a subscription-based model that eliminates the need for enterprises to own, build, and maintain their own network infrastructure. By replacing conventional hardware-centric VPNs, firewall appliances, load balancers, and MPLS connections, NaaS technology promises adopters the ability to rapidly scale up and down in lockstep with demand while eliminating hardware costs and bolstering network security and service levels.
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