Which port should be forwarded for remote acceess from automation builder (over internet) to the AC500 plc ?
I have forwarded port 1200 for PLC LAN address (to some unused WAN port) because i saw (with TCPView) that this port is used when i was connected locally from automation builder to AC500 PLC but still i can't connect over internet (when i have used fixed dyndns IP address and WAN port in codesys communication parameters and also made firewall exception for this port).
Asked 9 months ago
Answers
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The port of the vpn you setup between the plc and your engineering pc. Everything else is just very bad practice nowadays.
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Try enabling ICMP traffic (ping), this opens a network discovery security risk of course. Suggest a secure tunnel for communications to mitigate this.
Answered 3 months ago
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