[NeMo-DDoS-List] FW: [Geant NeMo] #226648 UPD CRIT: IUCC (AS378) - "Still high SYN packet rate: 915k SYN Packets/s" [IUCC] [Customer] [Email_Analysis]

[Hank Nussbacher]

________________________________________
From: nemo-ddos at host.geant.org <nemo-ddos at host.geant.org>
Sent: Monday, December 29, 2025 12:24:02 PM (UTC+02:00) Jerusalem
To: soc at geant.org
Subject: [Geant NeMo] #226648 UPD CRIT: IUCC (AS378) - "Still high SYN packet rate: 915k SYN Packets/s" [IUCC] [Customer] [Email_Analysis]

Still high SYN packet rates of
  915k SYN Packets/s
on
  autonomoussystem IUCC (AS378).

Upgraded to severity Critical.

Alert ID: 226648
Status: Open
Severity: Critical

Start Time: 2025-12-29 10:11:45
End Time: ongoing
Start Time (Europe/Berlin): 2025-12-29 11:11:45
End Time (Europe/Berlin): ongoing
Duration: 13 min

First Event Seen: 2025-12-29 10:09:00
Last Event Seen: 2025-12-29 10:22:00
Event Count: 11

Trigger: High SYN Packet Rate (AS) (Email_Analysis+threshold) (ID 69)

Alert Description:
High SYN packet rate.

Affected Objects:
        Type              Name       Event Count
---------------------------------------------------
Autonomoussystem    IUCC (AS378)          11



Further Details:
https://secondary.nemo.geant.org/alerts/details/226648/

All times expressed in UTC.