(Windows | Linux)ssh访问服务器报错：no matching key exchange method found

问题现象

ssh user1@192.168.1X.XX
Unable to negotiate with 192.168.1X.XX port 22: no matching key exchange method found. Their offer: gss-group1-sha1-toWM5Slw5Ew8Mqkay+al2g==,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1

OpenSSH in Linux解决方法

方案一：ssh -o选项指定KexAlgorithms和HostKeyAlgorithms

ssh -o KexAlgorithms=+diffie-hellman-group1-sha1 -o HostKeyAlgorithms=+ssh-rsa user1@192.168.1X.XX

注：  -o 'option' Process the option as if it was read from a configuration file.

方案二：配置/etc/ssh/ssh_config客户端配置文件

KexAlgorithms=+diffie-hellman-group1-sha1
HostKeyAlgorithms=+ssh-rsa
MACs=+hmac-sha1

OpenSSH in Windows解决方法

上面的解决方法，方案一在Linux和Windows上都OK，但是方案二针对的是Linux下的，很简单~~

那么Windows下安装的OpenSSH呢？存在ssh_config吗？

我们先看看Windows上的OpenSSH安装目录在哪？有没有ssh_config。

C:\Windows\System32\OpenSSH\下有sshd_config_default，却没有ssh_config文件；手动增加，配置后也没有生效。好吧~~去Microsoft官网查查吧！

OpenSSH Server configuration for Windows | Microsoft LearnLearn about the Windows-specific configuration options for OpenSSH Server on Windows Server and Windows.https://learn.microsoft.com/zh-cn/windows-server/administration/OpenSSH/openssh-server-configuration通过上面链接查找，刚好查到，ssh客户端配置文件：%userprofile%\.ssh\config

那么，我们看看%userprofile%\.ssh\目录下都有啥：

dir %userprofile%\.ssh\
 Volume in drive C is Windows
 Volume Serial Number is D46B-XXXX

 Directory of C:\Users\user1\.ssh

2025/02/14  10:33    <DIR>          .
2025/02/14  09:55    <DIR>          ..
2025/02/14  09:55               225 known_hosts
               2 File(s)            311 bytes
               2 Dir(s)  15,802,699,776 bytes free

没有config文件，创建一个即可：

echo KexAlgorithms=+diffie-hellman-group1-sha1 >> %userprofile%\.ssh\config
echo HostKeyAlgorithms=+ssh-rsa >> %userprofile%\.ssh\config
echo MACs=+hmac-sha1 >> %userprofile%\.ssh\config

C:\Users\xiao>ssh user1@192.168.XX.210
Authorized users only. All activity may be monitored and reported.
(user1@192.168.XX.210) 口令:
Last login: Fri Feb 14 09:55:23 2025 from 192.168.XX.70
Oracle Corporation      SunOS 5.10      Generic Patch   January 2005
user1@solaris10u11-210:~$