Clever Geek Handbook

CIFS over SSH using standard Windows 10 tools

I am lazy and therefore I like it when everything is organized conveniently, without unnecessary gestures. Sometimes I am too lazy to do it comfortably.



Once I needed to organize access to the server via SMB and while looking for a solution I came across the following article: Mounting your Nikhef home directory using SSH for Windows 8 . It was a simple and easy to use solution that Putty used. A little later, I had to configure this solution on another computer and I realized that Putty was superfluous here since the built-in ssh client based on OpenSSH appeared in Windows 10.



Under the cut - an identical scheme, only using OpenSSH under Windows 10.



My scheme is organized as follows:



  1. Samba is running on the server, the root folder with sites is shared on behalf of the www-data user. Access to the server only via ssh with key authorization. Server behind NAT, port forwarded only for ssh.
  2. In the process of logging into an account on a home machine on Windows 10 through the built-in OpenSSH system, a connection is established to the server with authorization by key.
  3. Port 445 of the remote machine is tunneled to local port 44445 of the network loopback adapter available at 10.255.255.1
  4. On loopback adapter 10.255.255.1 port 44445 is proxied to local 445. Thus, when connecting to \\ 10.255.255.1 \, a remote file ball opens (which, if necessary, is mounted as a network drive).


All this is automatic - laziness triumphs. Safe, fast and native looking. Any editor can open and edit files on a remote server as well as on my local one - without problems downloading the edited files and setting them the necessary permissions. That being said, there are no security issues with Samba.



So - first step by step:



WINDOWS side



OpenSSH. Windows 10 Windows Server 2019 SSH OpenSSH. . – 



ssh




— "", .



1.



loopback- . .



hdwwiz.exe




« » ( Windows 10 Pro).



«» -> « , » -> « » -> «Microsoft –> Microsoft KM-Test» -> «»



, , devcon.exe, .



CMD ( ).



netsh interface show interface




. Ethernet 2.









:



netsh interface ip set address name="Ethernet 2" source=static address=10.255.255.1 mask=255.255.255.0


10.255.255.1



, TCP- 445, Windows lanmanserver . lanmanserver portproxy, .



( «start=» !!!):



sc config lanmanserver start= demand
sc config iphlpsvc start= auto


10.255.255.1 44445 445



netsh interface portproxy add v4tov4 listenaddress=10.255.255.1 listenport=445 connectaddress=10.255.255.1 connectport=44445


, lanmanserver .



loopback-, 



netstat -an | find ":445 "




TCP    10.255.255.1:445    0.0.0.0:0       LISTENING


. "0.0.0.0:445" — - . 



netsh interface portproxy show v4tov4


2.



. , . 



mkdir %APPDATA%\CIFSoverSSH
cd %APPDATA%\CIFSoverSSH


ssh- ( , : cifsoversshkey)



ssh-keygen -t rsa -N "" -f cifsoversshkey


. , OpenSSH UNPROTECTED PRIVATE KEY FILE! . , Windows. GUI, . Windows :



icacls cifsoversshkey /RESET
icacls cifsoversshkey /grant _:F /inheritance:r


, . 



icacls cifsoversshkey


, OpenSSH !



cifsoverssh.cmd :



call cmd /c start "" /B C:\Windows\System32\OpenSSH\ssh.exe user@111.111.111.111 -p remoteport -i %APPDATA%\CIFSoverSSH\cifsoversshkey -L 10.255.255.1:44445:localhost:445 -N -o "StrictHostKeyChecking=no"


:

user@111.111.111.111 – linux @



3.



: powershell -nologo -noninteractive -windowStyle hidden -command "%APPDATA%\CIFSoverSSH\cifsoversshkey.cmd"

powershell . CMD , , .



:



schtasks /CREATE /RU %username% /TN "CIFS over SSH" /TR "powershell.exe -nologo -noninteractive -windowStyle hidden -command %APPDATA%\CIFSoverSSH\cifsoversshkey.cmd" /SC ONLOGON /DELAY 0000:10 /IT /RL highest


Windows .



Linux



, ssh- .



ssh windows-



C:\Windows\System32\OpenSSH\ssh.exe user@111.111.111.111 -p remoteport


, ~/.ssh/authorized_keys ( – ).



mkdir ~/.ssh && touch ~/.ssh/authorized_keys


, windows- ( %APPDATA%\CIFSoverSSH\cifsoversshkey.pub). . , .



Samba ( Debian)



apt update && apt install samba




mv /etc/samba/smb.conf /etc/samba/smb.conf.old
touch /etc/samba/smb.conf


:



[global]
realm = webserver
server string = Web server
workgroup = WORKGROUP
# Setup charsets
dos charset = cp1251
unix charset = utf8
# Disable printers
load printers = No
show add printer wizard = no
printcap name = /dev/null
disable spoolss = yes
# Setup logging
log file = /var/log/smbd.log
max log size = 50
max xmit = 65536
debug level = 1
# Setup daemon settings
domain master = No
preferred master = Yes
socket options = IPTOS_LOWDELAY TCP_NODELAY SO_SNDBUF=65536 SO_RCVBUF=65536 SO_KEEPALIVE
os level = 65
use sendfile = Yes
dns proxy = No
dont descend = /proc,/dev,/etc
deadtime = 15
# Enable synlinks
unix extensions = No
wide links = yes
follow symlinks = yes

# Securtity settings
security = user
map to guest = Bad Password
guest account = nobody
create mask = 0664
directory mask = 0775
hide dot files = yes
client min protocol = SMB2
client max protocol = SMB3
[ShareName]
comment = Sites folder
path = /home/web
force user = www-data
force group = www-data
read only = No
guest ok = Yes
writable = yes
create mask = 0664
directory mask = 2775


. ShareName. Path = , . force user force group linux-, . - – www-data



Samba



systemctl restart smbd


Windows



exit


. windows ( ).



\\10.255.255.1\ShareName — .



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