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Flashcards by Malachy Moran-Tun, updated more than 1 year ago
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| Question | Answer |
| What is a Firewall? | > A piece of hardware or software that sits between a device and the Internet > Inspect and filter incoming and outgoing packets > Try to stop unauthorised access to the network (e.g., hackers, malware etc.) |
| What actions do Firewalls do to Stop Network Traffic? | > Packet filtering - inspects each packet and drops those which do not meet certain criteria > IP address filtering - only allows traffic from certain sources (useful to prevent DDoS attacks) > Port blocking - blocks access to certain ports, e.g., port 22, which allows remote access |
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