Sh4mefulNetwork: IRONPORT-DH ⚠ Confounder
⚠ Confounder Detected: Cisco IronPort
Cisco IronPort (now primarily branded as Cisco Email Security and Web Security) provides appliances and cloud services to defend against email-borne threats like spam, phishing, and malware, alongside web-based risks.
Cisco IronPort (now primarily branded as Cisco Email Security and Web Security) provides appliances and cloud services to defend against email-borne threats like spam, phishing, and malware, alongside web-based risks.
This page shows DMARC authentication failures originating from the IRONPORT-DH network. Learn more about this data.
Analysis
This network has contributed 8 unique IP addresses across 28 failed authentication events, accounting for 32 messages. Activity spans from March 13, 2024 to September 25, 2025, with peak volume in September 2025 (5 events). The top countries by failure volume are United States (100%). The most active source IPs from this network include 68.232.143.27 (6 failures), 68.232.141.189 (5 failures), 68.232.137.121 (5 failures). Failures from IRONPORT-DH (Cisco) are concentrated in a single country, which may indicate a targeted campaign or regionally hosted infrastructure.
Failures Detected from this Network
Showing 1-28 of 28 failures, affecting 32 messages| Date ▲ | Source IP | Country | Messages |
|---|---|---|---|
| 3/13/2024 | US | 1 | |
| 3/13/2024 | US | 3 | |
| 9/12/2024 | US | 1 | |
| 9/25/2024 | US | 1 | |
| 9/25/2024 | US | 1 | |
| 9/26/2024 | US | 1 | |
| 12/11/2024 | US | 1 | |
| 12/11/2024 | US | 1 | |
| 12/17/2024 | US | 1 | |
| 12/20/2024 | US | 2 | |
| 1/8/2025 | US | 1 | |
| 1/8/2025 | US | 1 | |
| 1/17/2025 | US | 1 | |
| 1/17/2025 | US | 1 | |
| 5/1/2025 | US | 1 | |
| 5/3/2025 | US | 1 | |
| 5/13/2025 | US | 1 | |
| 6/4/2025 | US | 1 | |
| 6/26/2025 | US | 1 | |
| 6/27/2025 | US | 1 | |
| 6/28/2025 | US | 1 | |
| 8/5/2025 | US | 1 | |
| 8/21/2025 | US | 1 | |
| 9/11/2025 | US | 2 | |
| 9/24/2025 | US | 1 | |
| 9/24/2025 | US | 1 | |
| 9/25/2025 | US | 1 | |
| 9/25/2025 | US | 1 |
Countries