Upon reviewing the log in my Barracuda Spam and Virus Firewall I noticed a total of 256 "Authentication Failure (-[-])" entries all originating from the same ip address (188.8.131.52)(This address traces back to Great Britain) in a matter of 2 minutes.
I have never seen this type of entry before in the logs. My questions are:
A. What exactly is this user/bot attempting to do?
B. is this something I need to worry about?