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Im operating a mail server which handles email flows from multiple domains (20 domains). The server is under a massive IMAPS (%%port:993%%) scan for a few days. More details about the ongoing attack:
There is an OSSEC active-response with the repeated_offender">%%ip:18.104.22.168%%
Someone else has already detected the same kind of scan?
Xavier Mertens (@xme)
ISC Handler - Freelance Security Consultant