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Which ethernet protocol is used by atvise Builder to download the project to the netSCADA deviceports need to be open to get a bidirectional access over a Router? |
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A netSCADA device uses TCP based HTTP protocol on standard port 80 for showing web content over the browser TCP based FTP protocol on standard port 21 for performing a download procedure during distribution process. Both ports 80 and 21 need to be opened in your routers "open ports" or "port forwarding" configuration settings to get a full access a netSCADA device over the internet. If you just want to visualize and do no programming it is enough just to open port 80. Special note about bidirectional FTP access: During the distribution procedure atvise Builder uses the standard FTP ethernet protocol .The connection will be established using the passive FTP mode. The atvise Builder initiates a described here https://en.wikipedia.org/wiki/File_Transfer_Protocol. Read on for details in the active/passive FTPconnection chapter. When the distribute command is used within atvise Builder the connection will be executed across a 'passive' FTP mode connection by an FTP client running as a Windows service in the backgound. The FTP client initiates this connection using a PASV command over port 21 while the netSCADA device replies over a free port >1023.You may port 21. So make sure that the port 21 is opened from communications from atvise PC->netSCADA device. The passive protocol defines that with a FTP passive connection the server (netSCADA device) replies with a port beyond >1023. So make sure that this port netSCADA device->atvise PC is also opened. This port will be determined dynamically by netSCADA device and cannot be predicted. Either you make a local ethernet frame analysis to get knowledge of this port or you configure a range of ports in your router to be opened. To make tests if a proper FTP connection works you can use a standard FTP client such as Filezilla https://filezilla-project.org/ to get access to a netSCADA device alternatively. The client software needs to be configure in passive mode with authentication using the login user: admin and password: ftpnetlink Summary: In case you want to a establish a connection over Internet across a router to a local netSCADA device then you have to open or forward the port 21 and AND the specific netSCADA FTP reply port in order to allow a proper connection from remote. |
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