Hi @stefanhe99,
When you connect to the FTP server you’re just getting information about the file system instead of robot status data from the UR controller, so it seems logical that this wouldn’t necessarily be included with the URSIM install.
I’ve just tried this out on my own 64 bit Ubuntu URSIM install and had a similar situation, so just go ahead and follow a guide like the one at the link below to install vsftpd FTP server and then add “listen_port=22” to the config file and you should have the same functionality as the standard URSIM package (which has this preconfigured).
Final note that might not be relevant once you’ve installed the FTP server: I initially got the same “ftp: 127.0.0.1: Address family for hostname not supported” message before installing the server. Googling this mentioned a lot about IPv4 vs v6, and I noticed that the way I had my network interfaces configured it was for some reason trying to get a v6 address that I don’t think my network supports. Once I fixed this and got my machine on my wifi network with a v4 address the Address family error turned into a standard connection refused error.