host.fqdn.tld: Trying password authentication.
host.fqdn.tld: Login completed, opening dummy shell channel.
host.fqdn.tld: channel 0: new [client-session]
host.fqdn.tld: Requesting channel_open for channel 0.
host.fqdn.tld: channel 0: open confirm rwindow 32768 rmax 16384
host.fqdn.tld: channel 1: new [client-session]
host.fqdn.tld: Requesting channel_open for channel 1.
host.fqdn.tld: Channel open failure: 1: reason 4: Server supports one session per SSH client
host.fqdn.tld: sftp: Sending SSH2_FXP_INIT
Connection closed at recurse_sftp.pl line 37