Hello @michael.mcmahon
No, it is not possible to use NetFlow to monitor usernames and passwords and compare their SHA2 hashes. NetFlow is a network protocol that is used to collect IP traffic information, such as source and destination IP addresses, protocol types, and port numbers. It does not capture or store sensitive information, such as usernames and passwords. Similarly, embedded event manager (EEM) is a Cisco IOS feature that allows you to automate tasks and detect events based on a wide range of criteria, but it is not designed to monitor or detect password hashes flowing through a network.
To monitor usernames and passwords and their hashes, it is recommended to use security solutions such as an IPS. Security solutions can be configured to detect and alert on the presence of sensitive information flowing through the network, such as usernames and passwords, and their corresponding hashes.
Best regards
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