TCP: C2S Exploit ACK for Data Not Yet Seen
This protocol anomaly triggers when it detects a client-to-server acknowledgment for an unseen packet. This can be an attempt to cause the server to send data at very high speeds. You can choose to ignore this for local clients and servers when running in sniffer mode.
References
srx-branch-12.3
srx-19.3
srx-branch-19.3
vsrx3bsd-19.2
srx-branch-19.4
vsrx-19.4
mx-12.3
mx-19.4
vmx-19.4
mx-19.3
vsrx3bsd-19.4
srx-19.4
vsrx-12.3
vmx-19.3
vsrx-19.2
srx-12.3