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  1. fblanchard
  2. PLCnext Technology & PLCnext Controls
  3. Saturday, 20 June 2020


 I try to run an independent C# application on a PLCnext (fw=2020.0.1) that need access to TCP port 50900, but it only work when running it as root.

For example, when running as “admin” (with all WBM permission added), I get this error: 

    Unhandled exception. System.Net.Sockets.SocketException (13): Permission denied

Any suggestions?



Oliver PLCnext Team Accepted Answer Pending Moderation

Hello Frederic,

so you need to open and bind a port?
opening a listening socket?

I think you can give these permissions by file.
Usually this is only necessary for ports < 1024.

setcap 'cap_net_bind_service=+ep' /path/to/program

kind regards,

Phoenix Contact Electronics Headquarter - PLCnext Runtime Product Management and Support

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