A firewall is a set of virtual rules that help prevent malicious applications from communicating with a device. They should be enabled on all compatible workplace devices.
Firewalls control communication to and from a device. They're a set of rules which manage traffic. Without one, malicious programs can interact with the device and cause harm.
Behaviours in SebDB are ranked by their impact on risk. Tier 1 behaviours have the biggest impact, Tier 4 behaviours the least.
Malware infections occur when malicious software makes its way on to a device or network.
Data theft is the intentional stealing of data.
https://www.ncsc.gov.uk/collection/10-steps-to-cyber-security?curPage=/collection/10-steps-to-cyber-security/the-10-steps/network-security https://www.ncsc.gov.uk/whitepaper/security-architecture-anti-patterns#section_5 https://www.cisco.com/c/en_uk/products/security/firewalls/what-is-a-firewall.html https://www.us-cert.gov/ncas/tips/ST04-004