[NeMo-DDoS-List] FW: [Geant NeMo] #243971 UPD CRIT: IUCC (AS378) - "4 alerts" [Customer] [IUCC] [Email_Analysis]

[Hank Nussbacher]

________________________________________
From: nemo-ddos at host.geant.org <nemo-ddos at host.geant.org>
Sent: Tuesday, April 21, 2026 6:58:10 PM (UTC+02:00) Jerusalem
To: soc at geant.org
Subject: [Geant NeMo] #243971 UPD CRIT: IUCC (AS378) - "4 alerts" [Customer] [IUCC] [Email_Analysis]

Aggregated 4 alerts. Upgraded to severity Critical.

Alert ID: 243971
Status: Open
Severity: Critical

Start Time: 2026-04-21 15:53:55
End Time: ongoing
Start Time (Europe/Berlin): 2026-04-21 17:53:55
End Time (Europe/Berlin): ongoing
Duration: 5 min

First Event Seen: 2026-04-21 15:51:00
Last Event Seen: 2026-04-21 15:56:00
Event Count: 23

Trigger: Multiple Alerts (ID 31)

Alert Description:
Aggregated 4 alerts.

Affected Objects:
        Type              Name       Event Count
---------------------------------------------------
Autonomoussystem    IUCC (AS378)          23

Child Alerts:
  Alert ID                    Description
--------------------------------------------------------------
243968      High packet rate.
243969      Abnormal ratio of SYN packets to ACK packets.
243970      High TCP packet rate.
243972      High SYN packet rate.


Further Details:
https://secondary.nemo.geant.org/alerts/details/243971/

All times expressed in UTC.