Three Questions and Answers on Packet filter firewalls

Can packet filter firewalls detect internal threats and attacks?
Answer: Packet filter firewalls have limitations in detecting internal attacks due to their mode of operation, which focuses on inspecting incoming and outgoing traffic and lacks the mechanism to detect the threat within the network.
What do we do to protect a network against IP spoofing using a packet filter?
Answers: A packet filter can block packets with known, suspicious, and untrusted IP addresses and restrict access to the network based on predefined IP ranges, and this operation can mitigate IP spoofing.
Can packet filter firewalls be used as the first line of defence against unauthorized access?
Answer: Yes, it can be used as the first line of defence based on the predefined rule by the administrator, which is set by filtering the packets based on IP addresses, port numbers, and protocols.

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