TFTP: REPLY: Unexpected Data
This protocol anomaly is a DATA message sent from the server after a client requested to WRITE a file to the server. Normally, servers do not send DATA messages in response to WRITE requests. This can indicate a malicious server or a tunneling attempt.
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