FTP access blocked on specific user

[Erwan David]

Le 02/15/2017 à 22:00, Jos Chrispijn a écrit :
> I have a sudden issue connecting with a certain username on sftp and
> predefined port.
> 
> Any other user gets immidiately access on the same ip and portnumber,
> but on this specific user things get stuck:
> Get a timeout and session is terminated. Only ftp:21 works.
> 
> First I thought it was domainname / dns related so I tried to get sftp
> access on internal network / ip number levelinstead of domain name.
> Unfortunately that doesn't provide access result.
> 
> Could it be that I should flush a certain session file in order to
> remove any information that blocks sftp access?
> 
> Perhaps this 'blocked user' has a damages user directory (folder) that
> causes the timeout?
> 
> Also checked ipfw icw SSHGuard (table22) but after flushing no
> improvement yet.
> 
> Can someone tell me what I may oversee here? Thanks!
> 

Check that this user's shell does not send multi-line message or prompt
with control characters in a non interactive session. This would break sftp.