Port range passive ftp.

[Braggel]

Dear All,

Question 1: Is there a way to limit the Passive FTP port range on a CompactRIO? If yes, how?

Question 2: The more general problem solving of the above,... Is there a way to get the ftp working on a CompactRIO through a 'dumb' gateway. I can only ask the gateway to forward a certain specific port to the CompactRIO's IP address. I have to configure the gateway through a website interface where I can only ask to forward one port to one LAN IP. So one line per Port/LAN IP. A range of 100 ports will cost me days to enter the values,... 😞

Any thoughts?

Thanks already!

Filip Verbinnen.

Laborelec.

[cedhoc]

Dear Filip, 

The cRIO FTP server follows the FTP specification which means the port range is 1023 - 65535 and it is not possible to modify this range.

Regarding your gateway, I am a bit surprised you cannot specify a range of ports. It is usualy often possible to specify a range or some kind of group of address/port. 

Maybe you can share the model of the gateway you are using? If it is really not possible to specify a range, I suppose you should not be the only one having to cope with this issue...

Kind regards,

[Braggel]

Hi Cédric,

It's a Moxa G3150 HSPA and I launched the port range question at their support. What about active vs. passive FTP? Can you change that setting?

Kind regards,

Filip.

[cedhoc · Accepted solution]

Hello Filip,

Actually, the cRIO accepts both modes. It just depends on the client.

If the client wants the active mode, he will send the PORT command to tell the server to which port he can establish the connection.

If the client wants the passive mode, he will send the PASV command and the server will reply with the port where the client can establish the connection.

So, nothing has to be changed on the cRIO.

Kind regards,