Could not connect to FTP

[Sebastiaan_de_Weert]

Hi,

Since yesterday I can't connect to any of my ftp clients.

For months I could login to my FTP using Coda and Filezilla and everything worked until yesterday.

Coda gives me this message:
Error -203: miscellaneous error occurred while trying to login to the host

Filezilla gives me this message:
Antwoord:220 ProFTPD 1.3.5 Server (ProFTPD) [MYSERVERIP]
Opdracht:USER username (username is my ftp username)
Antwoord:550 SSL/TLS required on the control channel

I have not changed anything on my server. Just out of the blue this errors appears and now my customers and I can't login anymore.

I tried to restart the server, made a new ftp account, but nothing seems to resolve the problem...

Does somebody knows what to do? I don't know if I can reinstall the ProFTPD or need to open port 21?
Any idea is welcome!

 

[IgorG]

Please check the following KB and let me know if it doesn’t help - http://kb.odin.com/en/120348

 

[Sebastiaan_de_Weert]

Please check the following KB and let me know if it doesn’t help - http://kb.odin.com/en/120348

Thank you for your response.

I'm not sure what to do:

The steps that I need to take are not that extensive...
What I think I need to do:

wget http://autoinstall.plesk.com/PSA_11.5.30/centos/opt/hosting/proftpd/

After the installation:

rpm -Uvh psa-proftpd.rpm --force --nodeps

is there no yum install proftpd?

 

[Sebastiaan_de_Weert]

I fixed it with changing the FTPS usage policy to Allow only non-secure FTP connections. Do not use FTPS

Screenshot:
http://cl.ly/image/0c3K3z2x1o41