1. Problem
Clone projects and other Git operations cannot be performed. ssh -T git@github,comAn error occurs when executing the detection connection command .
ssh:connect to host github.com port 22: Connection timed out
即：连接22端口超时
涉及到的文件：
C:\Users\JIACHENGER.ssh\config
C:\Users\JIACHENGER.ssh\github_id_rsa
C:\Users\JIACHENGER.ssh\github_id_rsa.pub
C:\Users\JIACHENGER\.ssh\known_hostsGenerate SSH connection logs
host文件
As long as C:\Windows\System32\drivers\etc\hosts
IP and C:\Windows\System32\drivers\etc\ 域名hosts 本地映射文件are included 在本机中查到了指定的域名, the search will not continue DNS(域名系统).
Windows sets local DNS domain name resolution hosts file configuration
配置SSH公私钥可参考我这篇: Detailed process of GitHub&Gitee&Gitlab&JihuLab simultaneously generating, configuring and detecting different SSH public and private keys
2. Solve problems
2.1 ssh:connect to host github.com port 22: Connection timed out
//详细连接过程，-v表示verbose
ssh -vT [email protected]
或者
ssh -Tvvv [email protected]
//nslookup是域名解析工具，8.8.8.8是Google的DNS服务器地址
nslookup github.com 8.8.8.8
//使用本机已经设置好的DNS服务器进行域名解析
nslookup github.com
Here ::1it is IPV6的localhost地址, 127.0.0.1is IPV4的localhost地址. This can basically be considered as DNS域名解析出了问题causing GitHub的域名被解析成了本地localhost的ip地址the inability to connect to GitHub.
2.2 kex_exchange_identification: Connection closed by remote host
此时又出现了一个问题：
kex_exchange_identification: Connection closed by remote host
Connection closed by ::1 port 22
Will C:\Users\JIACHENGER\.ssh\known_hostsback up and do it again known_hostslater , but after a while . Other platforms where I configured SSH public and private keys at the same time can reconnect normally (need to indicate, during the process ), and are in , as shown below: The detailed process of GitHub&Gitee&Gitlab&JihuLab simultaneously generating, configuring, and detecting different SSH public and private keys内容清空重新执行检测连接命令 ssh -T git@github,com偶尔可以连接成功还是会报同样的错误
除了GitHub以外(Gitee&Gitlab&极狐(JihuLab))输入yes确认确认添加主机到可信任列表本机在之前第一次生成SSH公私钥的时候，没有配置访问密码C:\Users\JIACHENGER\.ssh\known_hosts生成连接日志
2.3 Exclude ports
C:\Users\JIACHENGER\.ssh\config, if no port is specified in the config, port 22 will be used by default for SSH connection.
使用443端口(默认情况)config配置如下:
注意: GitHub port 443 主机名Hostnameis ssh.github.com, instead github.com.
# github
# ssh -T [email protected]
Port 443
#Port 22
Host github.com
Hostname ssh.github.com
PreferredAuthentications publickey
IdentityFile ~/.ssh/github_id_rsa
使用22端口(默认情况，不配置也是使用22端口)config配置如下:
# github
# ssh -T [email protected]
#Port 443
Port 22
Host github.com
Hostname github.com
PreferredAuthentications publickey
IdentityFile ~/.ssh/github_id_rsa
仍然还会报同样的错误，说明大概率和端口没有关系：
2.4 Manually configure GitHub domain name mapping in hosts to solve the problem
In host文件C:\Windows\System32\drivers\etc\hosts手动配置GitHub域名映射 , 末尾add a line to the file 140.82.113.4 github.com. github.comThe domain name here is consistent with the value C:\Users\JIACHENGER\.ssh\configin the file GitHub配置的Hostname, both are github.com.
# github
# ssh -T [email protected]
#Port 443
#注意：GitHub端口 443 的主机名Hostname为 ssh.github.com，而不是 github.com。
#Port 22 此处注释，默认也使用22端口
Host github.com
Hostname github.com
PreferredAuthentications publickey
IdentityFile ~/.ssh/github_id_rsa
IPAnd , as long as 域名, we will not continue to search in. Reference: Windows sets local DNS domain name resolution hosts file configuration本地映射文件在本机中查到了指定的域名DNS(域名系统)
# Added by Docker Desktop
192.168.1.14 host.docker.internal
192.168.1.14 gateway.docker.internal
# To allow the same kube context to work on the host and the container:
127.0.0.1 kubernetes.docker.internal
# End of section
#2023-9-19 19:08:03 配置
#解决ssh:connect to host github.com port 22: Connection timed out等问题
#在hosts中手动配置GitHub域名映射
140.82.113.4 github.com
When C:\Windows\System32\drivers\etc\hosts中manually configuring GitHub domain name mapping, you do not need to C:\Users\JIACHENGER\.ssh\configconfigure the port in the file, 默认使用22端口,
如下:
# github
# ssh -T [email protected]
#Port 443
#Port 22
Host github.com
HostName github.com
PreferredAuthentications publickey
IdentityFile ~/.ssh/github_id_rsa
如果配置了端口, the following error will be reported:
在hosts中手动配置GitHub域名映射后检测GitHub连接(The port is not configured in config, and port 22 is used by default) 成功连接:
$ ssh -T [email protected]
Hi DJCKING! You've successfully authenticated, but GitHub does not provide shell access.
3. Reference
Test SSH connection
on HTTPS port using SSH
GitHub&Gitee&Gitlab&JihuLab to generate, configure and detect different SSH public and private keys at the same time Detailed process Git
problem: Solve the "ssh:connect to host github.com port 22: Connection timed out"
pit: ssh: connect to host github.com port 22: Connection refused
Windows set up local DNS domain name resolution hosts file configuration
ssh remote login error: kex_exchange_identification: Connection closed by remote host