proftpd - TLS connection hangs authenticating

Posted by greydet on Server Fault See other posts from Server Fault or by greydet
Published on 2012-12-02T23:06:08Z Indexed on 2012/12/02 23:08 UTC
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I setup a proftpd server that uses TLS/SSL certificate for authentication.

Everything works well when I connect through lftp or Filezilla (with explicit connection). But once I attempt connecting with simple ftp connection from Filezilla, the USER command ends with the 550 response (SSL/TLS required). After that any further connection through lftp or Filezilla (with explicit connection) will hang authenticating. Anyone knows how to workaround this issue? Is there a way to ask Filezilla to automatically use TLS/SSL if required?

I am using Ubuntu server 10.04 with proftpd 1.3.2c. There is no error message in the log files.

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