Introduce extra delay before closing unauthenticated sessions To make it harder for attackers, introduce a delay to keep an unauthenticated session open a bit longer, thus blocking a connection slot until after the delay. Without this, while there is a limit on the amount of attempts an attacker can make at the same time (MAX_UNAUTH_PER_IP), the time taken by dropbear to handle one attempt is still short and thus for each of the allowed parallel attempts many attempts can be chained one after the other. The attempt rate is then: "MAX_UNAUTH_PER_IP / <process time of one attempt>". With the delay, this rate becomes: "MAX_UNAUTH_PER_IP / UNAUTH_CLOSE_DELAY".

-----BEGIN DSA PRIVATE KEY-----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-----END DSA PRIVATE KEY-----