1.install cygwin package
3.start cygwin shell

$ ssh-host-config
Generating /etc/ssh_host_key
Generating /etc/ssh_host_rsa_key
Generating /etc/ssh_host_dsa_key
Generating /etc/ssh_config file
Privilege separation is set to yes by default since OpenSSH 3.3.
However, this requires a non-privileged account called 'sshd'.
For more info on privilege separation read /usr/share/doc/openssh/README.privsep.
Should privilege separation be used? (yes/no) yes
Warning: The following function requires administrator privileges!
Should this script create a local user 'sshd' on this machine? (yes/no) yes
Generating /etc/sshd_config file
Added ssh to C:\WINDOWS\system32\drivers\etc\services
Warning: The following functions require administrator privileges!
Do you want to install sshd as service?
(Say "no" if it's already installed as service) (yes/no) yes
You appear to be running Windows 2003 Server or later. On 2003 and
later systems, it's not possible to use the LocalSystem account
if sshd should allow passwordless logon (e. g. public key authentication).
If you want to enable that functionality, it's required to create a new
account 'sshd_server' with special privileges, which is then used to run
the sshd service under.
Should this script create a new local account 'sshd_server' which has
the required privileges? (yes/no) yes
Please enter a password for new user 'sshd_server'. Please be sure that
this password matches the password rules given on your system.
Entering no password will exit the configuration. PASSWORD=password
User 'sshd_server' has been created with password 'password'.
If you change the password, please keep in mind to change the password
for the sshd service, too.
Also keep in mind that the user sshd_server needs read permissions on all
users' .ssh/authorized_keys file to allow public key authentication for
these users!. (Re-)running ssh-user-config for each user will set the
required permissions correctly.
Which value should the environment variable CYGWIN have when
sshd starts? It's recommended to set at least "ntsec" to be
able to change user context without password.
Default is "ntsec". CYGWIN=ntsec
The service has been installed under sshd_server account.
To start the service, call `net start sshd' or `cygrunsrv -S sshd'.
Host configuration finished. Have fun!
Administrator@win1 ~

$ net start sshd
The CYGWIN sshd service is starting.
The CYGWIN sshd service was started successfully.
Administrator@win1 ~

5.key authencation
就跟一般linux的作法一樣,如果要用putty 的話,請先匯入openssh所建立的private key,另存ppk才能使用


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