[NeMo-DDoS-List] FW: [Geant NeMo] #256497 UPD WARN: IUCC (AS378) - "3 alerts" [Customer] [Email_Analysis] [IUCC]

[Hank Nussbacher]

________________________________________
From: nemo-ddos at host.geant.org <nemo-ddos at host.geant.org>
Sent: Monday, July 20, 2026 4:37:13 AM (UTC+02:00) Jerusalem
To: soc at geant.org
Subject: [Geant NeMo] #256497 UPD WARN: IUCC (AS378) - "3 alerts" [Customer] [Email_Analysis] [IUCC]

Aggregated 3 alerts. Upgraded to severity Warning.

Alert ID: 256497
Status: Open
Severity: Warning

Start Time: 2026-07-20 01:36:56
End Time: ongoing
Start Time (Europe/Berlin): 2026-07-20 03:36:56
End Time (Europe/Berlin): ongoing
Duration: 1 min

First Event Seen: 2026-07-20 01:34:00
Last Event Seen: 2026-07-20 01:35:00
Event Count: 6

Trigger: Multiple Alerts (ID 31)

Alert Description:
Aggregated 3 alerts.

Affected Objects:
        Type              Name       Event Count
---------------------------------------------------
Autonomoussystem    IUCC (AS378)          6

Child Alerts:
  Alert ID                    Description
--------------------------------------------------------------
256496      High packet rate.
256493      Abnormal ratio of SYN packets to ACK packets.
256494      High TCP packet rate.


Further Details:
https://secondary.nemo.geant.org/alerts/details/256497/

All times expressed in UTC.