Cisco ASA Audit Event: 106015

106015: Deny TCP

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-6-106015: Deny TCP (no connection) from IP_address /port to IP_address /port flags tcp_flags on interface interface_name.

Event 106015 is generated when the ASA discards a TCP packet because it had no associated connection in the ASA connection table.

How could you resolve this situation?

This event does not require any action unless the ASA receives a large volume of such invalid TCP packets. If this is the case, trace the source of these packets and determine the reason these packets were sent.

Cisco ASA Auditing Tool

EventLog Analyzer is a comprehensive log management software with which you can centrally collect, analyze, and manage logs from all the different log sources in your network. You also get reports and alerts on your network security, making it a power-packed IT security tool.

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