Cisco ASA Audit Event: 108006

Cisco ASA Events

The logs of network perimeter devices such as firewalls, antivirus applications and intrusion prevention systems contain crucial information that helps to pre-emptively block security attacks and breaches. Hence, it's mandatory for you to monitor and audit these logs. Because Cisco ASA provides the combined functionality of all the three, it becomes all the more important to monitor its logs. 

ManageEngine's EventLog Analyzer, a comprehensive log management solution, collects and analyzes the log data from Cisco ASA devices, triggers alerts and generate reports on detected security incidents thus helping you to take suitable measures against security threats, if any. 

Cisco » 108006: Detected ESMTP size violation

108006: Detected ESMTP size violation

Cisco ASA is a security device that provides the combined capabilities of a firewall, an antivirus, and an intrusion prevention system. It also facilitates virtual private network (VPN) connections. It helps to detect threats and stop attacks before they spread through the network. 

Message: %ASA-7-108006: Detected ESMTP size violation from src_ifc: sip |sport to dest_ifc:dip |dport; declared size is: decl_size, actual size is act_size.

Event 108006 is generated when an ESMTP message size exceeds the size declared in the RCPT command. The message contains:

  • Source information name.
  • Source IP address or port number.
  • Destination interface name.
  • Destination IP address or port number.
  • Declared size.
  • Actual size.

How could you resolve this situation?

This event does not require any action.

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