Ok I was not in the bash shell
I get the same response as my Windows 10 computer
This is from the VCSA
~ ]# curl -v telnet://10.2.8.23:21
* Rebuilt URL to: telnet://10.2.8.23:21/
* Trying 10.2.8.23...
* Connected to 10.2.8.23 (10.2.8.23) port 21 (#0)
220 Microsoft FTP Service
So what can I try next? It looks like it connects fine