Ports < 1024 cannot be opened

Removed from:
Will not be fixed


Behavior of the new version:
 

Description of the behavior:

The Ethernet port cannot be opened for communication from the PLC application.

Conditions under which the behavior occurs:

  • A PLC application is used that opens an Ethernet port (TCP or UDP) < 1024 (e.g. with library CAA NetBaseServices)

 
Affected products:
Controller c430 (from V1.13)
Controller c520 (as of V1.13)
Controller c550 (from V1.13)

Short-term measures, Recommendations, Rating:
The Ethernet ports smaller than 1024 are system ports and must not be used from the PLC application. In previous versions, PLC applications could also open smaller ports. Due to the increased security guidelines, the misbehavior of the previous version has been eliminated.
The ports used in the PLC application must be changed to port >= 1024.
No change is planned for this behavior.



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URL for linking this AKB article: https://www.lenze.com/en-de/go/akb/202500036/1/
Meta data
Taxonomy: Controller c520 , Controller c550 , Controller c500 , Controller c430
AKB-ID: 202500036
Last update: 2025/05/27
Category: Version Informations

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