SFP on Synology

Posted on 2011-09-23
Last Modified: 2012-05-12

I tried to install/run SFTP on my Synolgy NAS DS 210J (latest version of OS, don't know which Linux version is under the hood).
Therefore I followed this article:

I can ssh with putty but not sftp. Config of server should be ok, this is most important line:
Subsystem      sftp    /usr/libexec/sftp-server
But it does not work. Can you assist me in troubleshooting?

This is the connection log:

Status:      Connecting to
Response:      fzSftp started
Command:      open "root@" 22
Command:      Pass: *********
Status:      Connected to
Error:      Fatal: unable to initialise SFTP on server: could not connect
Error:      Could not connect to server
Status:      Waiting to retry...
Error:      Connection attempt interrupted by user

This is the config of the server:

#       $OpenBSD: sshd_config,v 1.82 2010/09/06 17:10:19 naddy Exp $

# This is the sshd server system-wide configuration file.  See
# sshd_config(5) for more information.

# This sshd was compiled with PATH=/usr/bin:/bin:/usr/sbin:/sbin

# The strategy used for options in the default sshd_config shipped with
# OpenSSH is to specify options with their default value where
# possible, but leave them commented.  Uncommented options change a
# default value.

#Port 22
#AddressFamily any
#HostKey /etc/ssh/ssh_host_rsa_key
#HostKey /etc/ssh/ssh_host_dsa_key
#HostKey /etc/ssh/ssh_host_ecdsa_key

# Lifetime and size of ephemeral version 1 server key
#KeyRegenerationInterval 1h
#ServerKeyBits 1024

# Logging
# obsoletes QuietMode and FascistLogging
#SyslogFacility AUTH
#LogLevel INFO

# Authentication:

#LoginGraceTime 2m
#PermitRootLogin yes
#StrictModes yes
#MaxAuthTries 6
#MaxSessions 10

#RSAAuthentication yes
#PubkeyAuthentication yes

#ListenAddress ::

# The default requires explicit activation of protocol 1
#Protocol 2

# HostKey for protocol version 1
#HostKey /etc/ssh/ssh_host_key
# HostKeys for protocol version 2

#PubkeyAuthentication yes
#AuthorizedKeysFile     .ssh/authorized_keys

# For this to work you will also need host keys in /etc/ssh/ssh_known_hosts
#RhostsRSAAuthentication no
# similar for protocol version 2
#HostbasedAuthentication no
# Change to yes if you don't trust ~/.ssh/known_hosts for
# RhostsRSAAuthentication and HostbasedAuthentication
#IgnoreUserKnownHosts no
# Don't read the user's ~/.rhosts and ~/.shosts files
#IgnoreRhosts yes

# To disable tunneled clear text passwords, change to no here!
#PasswordAuthentication yes
#PermitEmptyPasswords no

# Change to no to disable s/key passwords
#ChallengeResponseAuthentication yes
ChallengeResponseAuthentication no

# Kerberos options
#KerberosAuthentication no
#KerberosAuthentication no
#KerberosOrLocalPasswd yes
#KerberosTicketCleanup yes
#KerberosGetAFSToken no

# GSSAPI options
#GSSAPIAuthentication no
#GSSAPICleanupCredentials yes

# Set this to 'yes' to enable PAM authentication, account processing,
# and session processing. If this is enabled, PAM authentication will
# be allowed through the ChallengeResponseAuthentication and
# PasswordAuthentication.  Depending on your PAM configuration,
# PAM authentication via ChallengeResponseAuthentication may bypass
# the setting of "PermitRootLogin without-password".
# If you just want the PAM account and session checks to run without
# PAM authentication, then enable this but set PasswordAuthentication
# and ChallengeResponseAuthentication to 'no'.
UsePAM yes
#UsePAM no

#AllowAgentForwarding yes
#AllowTcpForwarding yes
# no default banner path
#Banner none

# override default of no subsystems
Subsystem      sftp    /usr/libexec/sftp-server
#Subsystem       sftp    internal-sftp -f DAEMON -l VERBOSE
#Subsystem       sftp    /usr/syno/sbin/sftp-server -l DEBUG3

# Example of overriding settings on a per-user basis
#Match User anoncvs
#       X11Forwarding no
#       AllowTcpForwarding no
#       ForceCommand cvs server

Question by:janhoedt
  • 4
  • 2
  • 2

Expert Comment

ID: 36588306
Do you actually have an executable /usr/libexec/sftp-server ?
LVL 21

Accepted Solution

Papertrip earned 500 total points
ID: 36588704
comment out:
Subsystem      sftp    /usr/libexec/sftp-server

Open in new window

#Subsystem       sftp    internal-sftp -f DAEMON -l VERBOSE

Open in new window

reload sshd and try again.

Author Comment

ID: 36589990
There is no sftp at the location you mention:

DS> cd libexec/
DS> ls  share_delete             share_set
But it should be installed as

DS> ipkg install openssh-sftp-server
Package openssh-sftp-server (5.9p1-1) installed in root is up to date.
Nothing to be done
Successfully terminated.
VMware Disaster Recovery and Data Protection

In this expert guide, you’ll learn about the components of a Modern Data Center. You will use cases for the value-added capabilities of Veeam®, including combining backup and replication for VMware disaster recovery and using replication for data center migration.

LVL 21

Expert Comment

ID: 36590081
Did you try my suggestion?

Author Comment

ID: 36590086
I will

Expert Comment

ID: 36590675
What does 'ipkg files openssh-sftp-server' output?

Author Comment

ID: 36938352
Have to park this question since I cannot troubleshoot this for the time being. Will reopen/refer to it when timeslot would occur.

Author Closing Comment

ID: 36938355
Please see latest remark, can't ask other question without closing this so I'll have to close. Will reopen/refer to this later.

Featured Post

Free learning courses: Active Directory Deep Dive

Get a firm grasp on your IT environment when you learn Active Directory best practices with Veeam! Watch all, or choose any amount, of this three-part webinar series to improve your skills. From the basics to virtualization and backup, we got you covered.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Setting up Secure Ubuntu server on VMware 1.      Insert the Ubuntu Server distribution CD or attach the ISO of the CD which is in the “Datastore”. Note that it is important to install the x64 edition on servers, not the X86 editions. 2.      Power on th…
Fine Tune your automatic Updates for Ubuntu / Debian
Learn several ways to interact with files and get file information from the bash shell. ls lists the contents of a directory: Using the -a flag displays hidden files: Using the -l flag formats the output in a long list: The file command gives us mor…
Learn how to find files with the shell using the find and locate commands. Use locate to find a needle in a haystack.: With locate, check if the file still exists.: Use find to get the actual location of the file.:

856 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question