Hello, I was creating counter-measures against a DOS attack, but I failed to understand some numbers I received. I'm using HAProxy 2.0.14
My (expurged) frontend config is : listen test bind X.X.X.X:443 maxconn 65536 rate-limit sessions 128 But during the attack, the following numbers are reported on HAProxy status page : FRONTEND: Session rate: max=1821 ; limit=128 Putting cursor on "max" shows : max connection rate: 2368/s max session rate: 1821/s max request rate: 3901/s I wondered why session-rate exceeded my maximal number of 128 I set on config file. I'm probably not understanding something correctly here. The documentation seems quite clear : "Since the session rate is measured every millisecond, it is extremely accurate" Any clue ? Unfortunately I was not quick enough to record the traffic received, or dump internal HAProxy counters when this happens :( Thank you ! Olivier