Installing CYGWIN 64-bit with SSH (and optional packages)

install_cygwin_sshd.txt

Installing CYGWIN 64-bit with SSH (and other optional packages)
  1) Download cygwin setup.exe from http://www.cygwin.com as "cygwin-setup-x86_64.exe"
    - Execute cygwin-setup-x86_64.exe
    - Install from internet (for new packages)
    - Root directory: `c:\webserver\cygwin` + all users
    - Local package directory: use default value
    - Select a mirror to download files from
    - Select these (optional) packages:
      - net > openssh 6.8p1-1
      - admin > cygrunsrv 1.62-1
      - (audio > audiofile 0.3.6-1)
      - (editors > emacs 24.5-1)
      - (editors > emacs-w32 native Windows GUI 24.5-1)
      - (editors > nano 2.4.1-1)
      - (editors > vim 7.4.729-1)
    - Click continue
    - When everything is installed configure SSHD
  
  2) Set /var directory permissions for cygwin ssh privileges
    - directory /var needs group name "Users" or "Root" for cygwin
    - strip the ACL on the /var directory first, then change permissions:
    $ setfacl -b /var
    $ chown :Users /var
    $ chmod 757 /var
    $ chmod ug-s /var
    $ chmod +t /var
    
  3) Configure SSHD
    - open a cygwin terminal: start > RIGHT MOUSE ON "Cygwin64 Terminal" AND "RUN AS ADMINISTRATOR"
    - $ ssh-host-config
      - (Overwrite existing /etc/ssh_config: yes)
      - (Overwrite existing /etc/sshd_config: yes)
      - Should StrictModes be used? yes
      - (You have the required privileges: yes)
      - Should privilege separation be used: yes
      - New local account 'sshd': yes
      - Do you want to install 'sshd' as a service: yes 
      - (fails if dir permissions incorrect for /var, see #2)
      - Enter the value of CYGWIN for the daemon: [] (name CYGWIN: just press enter)
      - Do you want to use a different name: no
      +++ you can skip next step (it'll probably fail anyway) +++
      - Create new privileged user account '[username]\cyg_server': yes
        - enter password
        - re-enter password
      +++ end of skip +++
     
  4) Add a SSHD account
    - Open control panel
    - Create a new account with administrator rights
    - set a password for this new account

  5) Add the user to SSHD password
    $ cd /etc/
    $ cp passwd passwd_bak (backup passwd if you already have run mkpasswd.exe)
    $ /bin/mkpasswd.exe -l -u [new_username] >> /etc/passwd
      (for example: /bin/mkpasswd.exe -l -u roxlu >> /etc/passwd to add the password for roxlu)

  6) Open SSHD port (22) on Firewall
   - open Control Panel
   - click on System and Security
   - click on Windows Firewall
   - on left, click on Advanced Settings
     - click: select "Inbound Rules"
     - click: New Rule ...
        - [x] Port
          NEXT

        - TCP 
          Specific ports: 22
          NEXT

        - [x] Allow the connection
          NEXT

        - [x] Domain
          [x] Private
          [x] Public
          NEXT
  
  7) Start Windows Service (daemon)
    - check if the SSHD daemon is running
      - open Control Panel
      - search for "services"
      - click on "View Local Services" 
      - search for "CYGWIN sshd"
      - make sure it's there and running, else try re-installing sshd
      
  8) Testing and Troubleshooting
    - 1st check if you can connect to the SSHD server on the same machine:
      - open a Cygwin Terminal
      $ ssh -l [new_username] localhost
      
    - If you cannot connect to the server on localhost check if the sshd daemon/service is running (see #7)
    
    - Hint for git users:
      $ git config --global core.askpass "git-gui--askpass"

That's it !! Good luck.

good luck!
I will try it out!