| Event Id | 15111 |
| Source | ISA Server NNTP Filter |
| Description | ISA Server denied the assignment of the IP address 1 to the network adapter "2" since the IP address offered is not included in the "3" network IP addresses. This could indicate a possible DHCP attack. The Record Data contains the suspicious DHCP packet. |
| Event Information | According To Microsoft: This event occurs when the DHCP anti-poisoning intrusion detection mechanism detects a malicious or invalid offer. Resolution: Follow the instructions provided in the description for the related alert. To do this, in the console tree of ISA Server Management , click Monitoring, then click the Alerts tab. In the list of alerts, select the relevant alert. The alert description displays in the alert details pane. |
| Reference Links | Microsoft product: Internet Security and Acceleration Server Version: 4.0.3443.594 Event Source: ISA Server NNTP Filter Event ID: 15111 |
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