[NeMo-DDoS-List] FW: [Geant NeMo] #241221 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: Sunday, April 12, 2026 4:52:22 AM (UTC+02:00) Jerusalem
To: soc at geant.org
Subject: [Geant NeMo] #241221 UPD CRIT: IUCC (AS378) - "4 alerts" [Customer] [IUCC] [Email_Analysis]

Aggregated 4 alerts. Upgraded to severity Critical.

Alert ID: 241221
Status: Open
Severity: Critical

Start Time: 2026-04-12 01:48:05
End Time: ongoing
Start Time (Europe/Berlin): 2026-04-12 03:48:05
End Time (Europe/Berlin): ongoing
Duration: 5 min

First Event Seen: 2026-04-12 01:45:00
Last Event Seen: 2026-04-12 01:50:00
Event Count: 24

Trigger: Multiple Alerts (ID 31)

Alert Description:
Aggregated 4 alerts.

Affected Objects:
        Type              Name       Event Count
---------------------------------------------------
Autonomoussystem    IUCC (AS378)          24

Child Alerts:
  Alert ID                    Description
--------------------------------------------------------------
241218      High packet rate.
241219      Abnormal ratio of SYN packets to ACK packets.
241220      High TCP packet rate.
241222      High SYN packet rate.


Further Details:
https://secondary.nemo.geant.org/alerts/details/241221/

All times expressed in UTC.