The SFTP server logs show thousands of failed login attempts from hundreds of IP addresses worldwide. Which of the following controls would BEST protect the service?
By whitelisting authorized IP addresses, the SFTP server can mitigate the risk of unauthorized login attempts from worldwide IP addresses. Only connections originating from the pre-approved IP addresses will be allowed, significantly reducing the attack surface and limiting access to legitimate users or systems.
Option B, blacklisting unauthorized IP addresses, involves maintaining a list of IP addresses known to be malicious or unauthorized and blocking connections from those addresses. While this can provide some level of protection, it may be challenging to keep up with the constantly changing landscape of potential attackers and their IP addresses.
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Highly Voted 1 year, 11 months agoCyberCEH
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