What is IP spoofing and how can it be mitigated?
Explores a network attack where the source address is forged to hide identity or impersonate.
Why Interviewers Ask This
Network security is critical for preventing fraud and DDoS attacks. Interviewers assess your awareness of common attacks and defensive measures.
How to Answer This Question
Define IP spoofing as falsifying the source IP address. Explain its use in DoS attacks or bypassing filters. Discuss mitigation strategies like ingress filtering, packet inspection, and using trusted networks. Mention the limitations of IPsec in some contexts.
Key Points to Cover
- Definition of spoofing
- Attack vectors
- Ingress filtering
- Firewall configuration
Sample Answer
IP spoofing involves creating packets with a fake source IP address to disguise the sender's identity or impersonate another system. Attackers use this to launch denial-of-service attacks or bypass access controls. Mitigation includes ingress filtering at routers to drop packets with invalid source IPs and implementing strict firewall rules.
Common Mistakes to Avoid
- Confusing with MAC spoofing
- Suggesting impossible solutions
- Ignoring internal network threats
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