一、Winodws安装OpenSSH
(注：Jenkins + OpenSSH 存在版本问题）
1、安装OpenSSH 8.1p1
cmd 管理员运行
cd 到解压目录：比如
cd c:\OpenSSH-Win32
输入安装服务
powershell.exe -ExecutionPolicy Bypass -File install-sshd.ps1
2、配置服务
输入指令：
netsh advfirewall firewall add rule name=sshd dir=in action=allow protocol=TCP localport=22
3、启动服务
net start sshd
二、创建新用户及配置密码（用于Jenkins配置的用户）
三、Jenkins 配置
端口配置：22 默认
测试返回Success 表示成功
四、公钥连接方式
1、服务端 通过 ssh-keygen -m PEM -t rsa -b 2048 -C “administrator”
生成私钥和公钥
2、在用户/.ssh 上创建 authorized_keys ,自己的公钥拷贝到该文件，在3生成公钥后，同样添加进去。
3、Jenkins服务器端，同样生成ssh私钥和公钥，同样在.ssh下创建 authorized_keys 把自己的公钥拷贝过去，目标服务器的公钥也添加进去。
4、配置Jenkins 如下：
问题：Failed to connect SFTP channel java.io.IOException: inputstream is closed
解决：OpenSSH版本问题 或者 配置ssd_config 上修改成 Subsystem sftp internal-sftp
（经过好几天排除及多次安装卸载，最终确定是版本问题）
Jenkins 2.346.2（Jenkins服务器） + OpenSSH 8.1(目标服务器）
最后不管是用公钥还是账号密码，测试都通过
附: ssd_config文件配置内容：
# This is the sshd server system-wide configuration file. See
# sshd_config(5) for more information.
# 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 override the
# default value.
Port 22
#AddressFamily any
#ListenAddress 0.0.0.0
#ListenAddress ::
#HostKey __PROGRAMDATA__/ssh/ssh_host_rsa_key
#HostKey __PROGRAMDATA__/ssh/ssh_host_dsa_key
#HostKey __PROGRAMDATA__/ssh/ssh_host_ecdsa_key
#HostKey __PROGRAMDATA__/ssh/ssh_host_ed25519_key
# Ciphers and keying
#RekeyLimit default none
# Logging
#SyslogFacility AUTH
#LogLevel INFO
# Authentication:
#LoginGraceTime 2m
#PermitRootLogin prohibit-password
#StrictModes yes
#MaxAuthTries 6
#MaxSessions 10
PubkeyAuthentication yes
# The default is to check both .ssh/authorized_keys and .ssh/authorized_keys2
# but this is overridden so installations will only check .ssh/authorized_keys
AuthorizedKeysFile .ssh/authorized_keys
#AuthorizedPrincipalsFile none
# For this to work you will also need host keys in %programData%/ssh/ssh_known_hosts
#HostbasedAuthentication no
# Change to yes if you don't trust ~/.ssh/known_hosts for
# 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
# GSSAPI options
#GSSAPIAuthentication no
#AllowAgentForwarding yes
#AllowTcpForwarding yes
#GatewayPorts no
#PermitTTY yes
#PrintMotd yes
#PrintLastLog yes
#TCPKeepAlive yes
#UseLogin no
#PermitUserEnvironment no
#ClientAliveInterval 0
#ClientAliveCountMax 3
#UseDNS no
#PidFile /var/run/sshd.pid
#MaxStartups 10:30:100
#PermitTunnel no
#ChrootDirectory none
ChrootDirectory E:\ssh
#VersionAddendum none
# no default banner path
#Banner none
# override default of no subsystems
#Subsystem sftp sftp-server.exe
Subsystem sftp internal-sftp
# Example of overriding settings on a per-user basis
#Match User anoncvs
# AllowTcpForwarding no
# PermitTTY no
# ForceCommand cvs server
# Match Group administrators
# AuthorizedKeysFile __PROGRAMDATA__/ssh/administrators_authorized_keys