[NeMo-DDoS-List] FW: [Geant NeMo] #194083 UPD CRIT: IUCC (AS378) - "Critical: Abnormal SYN:ACK ratio: 195k ACK Packets/s, 313k SYN Packets/s" [IUCC] [Customer] [Email_Analysis]

[Hank Nussbacher]

________________________________________
From: nemo-ddos at geant.org <nemo-ddos at geant.org>
Sent: Saturday, October 7, 2023 7:18:03 AM (UTC+02:00) Jerusalem
To: soc at geant.org
Subject: [Geant NeMo] #194083 UPD CRIT: IUCC (AS378) - "Critical: Abnormal SYN:ACK ratio: 195k ACK Packets/s, 313k SYN Packets/s" [IUCC] [Customer] [Email_Analysis]

Critical: Observed abnormal SYN:ACK packet ratio with
  195k ACK Packets/s, 313k SYN Packets/s
on
  autonomoussystem IUCC (AS378).

Alert ID: 194083
Status: Open
Severity: Critical

Start Time: 2023-10-07 04:02:48
End Time: ongoing
Start Time (Europe/Berlin): 2023-10-07 06:02:48
End Time (Europe/Berlin): ongoing
Duration: 16 min

First Event Seen: 2023-10-07 04:00:00
Last Event Seen: 2023-10-07 04:16:00
Event Count: 17

Trigger: Abnormal SYN / ACK Ratio (AS) (Email_Anal) (ID 59)

Alert Description:
Abnormal SYN:ACK packet ratio

Affected Objects:
        Type              Name       Event Count
---------------------------------------------------
Autonomoussystem    IUCC (AS378)          17



Further Details:
https://primary.nemo.geant.org/alerts/details/194083/

All times expressed in UTC.