On Fri, 23 Jan 2009, Kjeld Flarup Christensen wrote:

> As we were testing FTPS we discovered that FTPS works with FPT servers not
> supporting FTPS. As it can be seen from the snippets below, curl ignores
> that the server cannot speak SSL and aparantly falls back to plain
> unencryptet FTP. Bug or feature?
>
> Is there a way to make curl insist on using ssl. My example here is just for
> the command line. We actually are using the library interface.
>
> curl -v --ftp-ssl -l --user ftpuser:ftpuser ftp://172.31.135.6

Did you try reading the man page?

It includes several related --ftp-ssl commands, and I think you're looking for
--ftp-ssl-reqd.

-- 
  / daniel.haxx.se
-------------------------------------------------------------------
List admin: http://cool.haxx.se/cgi-bin/mailman/listinfo/curl-users
FAQ:        http://curl.haxx.se/docs/faq.html
Etiquette:  http://curl.haxx.se/mail/etiquette.html