#Fields: date time c-ip agent account cs-username s-ip s-port cs-method cs-uristem cs-uriquery s-computername sc-bytes cs-bytes time-takenģ1-03-13 06:26:01 185.222.209.113 IMAP-IN - 66.249.66.134 5216 AUTHENTICATE cXdlcnR5 2+NO+AUTHENTICATE+LOGIN+failed+-+Invalid+username+or+password.
If you are running IMAP on your server, you may notice thousands of repeating entries in your logs like the one below: Anyone is able to download ready-to-go toolsĪnd start abusing your server's resources. the Internet is full of tools for IMAP brute-forcing. Internet Message Access Protocol (IMAP) is one of the most popular protocols for email retrieval nowadays.Īnyone is able to download ready-to-go tools and start abusing your server's resources.īeing so popular, it's no surprise that this protocol becomes the target for brute-force attacks very often
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