I am using VPS. ubuntu.
❯ telnet [my vps ip address] 21
Trying [my vps ip address]…
telnet: connect to address [my vps ip address]: Connection refused
telnet: Unable to connect to remote host
root@vps******:~# sudo ufw status
Status: active
To Action From
– ------ ----
OpenSSH ALLOW Anywhere
Apache Full ALLOW Anywhere
8000/tcp ALLOW Anywhere
8080/tcp ALLOW Anywhere
443/tcp ALLOW Anywhere
8443 ALLOW Anywhere
21/tcp ALLOW Anywhere
21 ALLOW Anywhere
OpenSSH (v6) ALLOW Anywhere (v6)
Apache Full (v6) ALLOW Anywhere (v6)
8000/tcp (v6) ALLOW Anywhere (v6)
8080/tcp (v6) ALLOW Anywhere (v6)
443/tcp (v6) ALLOW Anywhere (v6)
8443 (v6) ALLOW Anywhere (v6)
21/tcp (v6) ALLOW Anywhere (v6)
21 (v6) ALLOW Anywhere (v6)
My firewall is not blocking port 21. FTP. why can't I use this port?