Install sshd for cygwin

• For Windows XP , open a cygwin window by double clicking the icon; a black screen pops open,
• For Windows Vista , right click the icon and choose "run as administrator"; a black screen pops open, type

• ssh-host-config -y (on slower computers, it may take several minutes to generate the dsa security keys)
  If the script asks you about "privilege separation", answer yes
  If the script asks about "create a local user sshd on this machine", answer yes
  If the script asks you about "install sshd as a service", answer yes

• Windows Vista
  If Vista asks "create a new local account ssh_server which has the required privileges" answer yes

• When the script stops and asks you for "environment variable CYGWIN=" your answer is ntsec or tty
  (click here for an explanation of ntsec)

• Start sshd
  net start sshd
  or
  cygrunsrv --start sshd

• Stop sshd
  net stop ssh
  or
  cygrunsrv --stop sshd

• If the service fails to start, try
  chown system /etc/ssh*
  chown system /var/empty
  net start sshd

• Important Pop a cygwin window, harmonize Windows user information with cygwin, otherwise they cannot login
  After you created (or removed) Windows users
  mkpasswd -cl > /etc/passwd
  mkgroup --local > /etc/group
  
  mkpasswd creates a password file from Windows' user list
  mkgroup creates a group file from Windows' user list

• Test to see if sshd is working, pop a cygwin window (note: the command below is case sensitive)
  whoami
  ssh localhost
  or
  ssh -vvv localhost
  or
  ssh $USERNAME@127.0.0.1

• if ssh complains "The authenticity of host xx.xx.xx.xx can't be established .... Are you sure you want to continue connecting (yes/no)?" Answer yes (Thanks to Daniel Griscom of Suitable Systems)
• If you get an error message like "ssh-exchange-identification: Connection closed by remote host", it is probably caused by McAfee 8.0i, see this page about the fix. (Thanks to Ron Dozier of University of Delaware, USA)
• If you get an error message like "entry point _getreent", or "QuerryService Status: Win32 error 1062", it is probably caused by the existance of an older version of "cygwin1.dll" located in the search path. Do a full serarch of "cygwin1.dll" and remove the old version, except the current version at c:\cygwin\bin (Thanks to Joe britton)

• If you get a prompt without error messages, type
  cd /cygdrive/c
  if you see a directory listing, success!
  
  If you have troubles ssh into the server, try run ssh-user-config

以上資料轉載自 http://pigtail.net/LRP/printsrv/cygwin-sshd.html