Intrusion PreventionIMAP.Unknown.Reply
Description
This signature indicates detection of a SMTP protocol anomaly of which an unknown response from a server is sent.
Affected Products
Any host running SMTP services
Impact
Protocol Anomaly: This is an anomaly which may also indicate attack attempts in some cases.
Recommended Actions
This indicates detection of traffic that does not comply with the protocol standard.
Monitor the traffic from that network for any suspicious activity.
Telemetry
Coverage
| IPS (Regular DB) | |
| IPS (Extended DB) |
| ID | 12381 |
| Created | Sep 11, 2006 |
| Updated | Sep 08, 2017 |
| Risk |
|
| Default Action | pass |
| Active | |
| Affected OS | All |
| Affected App | All |