注意：是在Windows搭建ssh server提供给外部访问，不是Linux。

主要步骤参考Microsoft官方文章 Install OpenSSH | Microsoft Docs

1.  首先Windows10当前的版本本身就支持openssh-server，只是默认关闭，需要我们开启

To install the OpenSSH components:

1. Open Settings, select Apps > Apps & Features, then select Optional Features.

2. Scan the list to see if the OpenSSH is already installed. If not, at the top of the page, select Add a feature, then:

   • Find OpenSSH Client, then click Install
   • Find OpenSSH Server, then click Install

2. 从命令行启动服务

# Start the sshd service
Start-Service sshd

# OPTIONAL but recommended:
Set-Service -Name sshd -StartupType 'Automatic'

# Confirm the firewall rule is configured. It should be created automatically by setup.
Get-NetFirewallRule -Name *ssh*

# There should be a firewall rule named "OpenSSH-Server-In-TCP", which should be enabled
# If the firewall does not exist, create one
New-NetFirewallRule -Name sshd -DisplayName 'OpenSSH Server (sshd)' -Enabled True -Direction Inbound -Protocol TCP -Action Allow -LocalPort 22

 3. 尝试从ubuntu连接Windows的ssh server

不知道是公司电脑域管理的问题还是什么，我用administrator是访问失败的，所以我新建了一个用户：

 然后再次访问就成功了：

jianxin@ubuntu:~$ ssh jianxin@192.168.109.1
jianxin@192.168.109.1's password: 

Microsoft Windows [版本 10.0.18363.592]
(c) 2019 Microsoft Corporation。保留所有权利。

jianxin@xxxx C:\Users\jianxin>

同时也可以使用scp进行文件拷贝了

jianxin@ubuntu:~$ scp jianxin@192.168.109.1:D:/test2.html .
jianxin@192.168.109.1's password: 
test2.html                                             100% 8586     3.8MB/s   00:00