Rated X

Hello Silvio,

the Port you are looking for is the TCP port 102:

http://support.automation.siemens.com/WW/view/en/8970169

 I do not see the HMI port designation on this document.  Port 102 will just get me to the PLC, what port can I forward through my router to reach a Siemens HMI?  The particular one I am working on at the moment is a TP900 Comfort but I expect all the Siemens HMI's use the same port.

Also, can the port on the PLC or the HMI be altered?  If I am trying to access remotely through a router to more than one PLC without using a VPN I need to forward ports to the respective PLC.  Can these be changed?

Thanks.

Found the answer myself.  It's port 2308.

Here is a link to a different port list

https://support.industry.siemens.com/cs/document/24534065/which-ports-are-used-by-wincc-flexible?dti=0&lc=en-WW