This indicates an attack attempt against a Denial of Service vulnerability in FactoryTalk Linx.
The vulnerability is caused by an error when handle an craft message. It allows a remote attacker to cause a denial-of-service condition to a vulnerable server.
This is an threshold signature. The default threshold is 100 attempt per second.
Denial of Service: Remote attackers can crash vulnerable systems.
Currently we are unware of any vendor supplied path for this issue.
For Rockwell customers please follow advised mitigation guidelines in following link: