ssh: connect to host github.com port 22: Connection refused

最近使用 git 拉取 Github 上的项目时老是出现 Connection refused ：

$ git pull origin master
ssh: connect to host github.com port 22: Connection refused
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.

网上的解决办法

解决ssh: connect to host github.com port 22: Connection refused

vim ~/.ssh/config

Host github.com  
User [email protected]  
Hostname ssh.github.com  
PreferredAuthentications publickey  
IdentityFile ~/.ssh/id_rsa  
Port 443

但是在使用了这个方法后依然无法解决：

$ git pull origin master
ssh: connect to host ssh.github.com port 443: Connection refused
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.

然后看见隔壁工位上大哥的搜索栏上赫然也是这个问题，交流一番应该是最近墙比较敏感的问题。
解决方法也从大哥那里找到了，不得不说大哥YYDS，我还是太年轻了：

1. 首先到 ipaddress 输入 github.com 查找到其IP地址
2. 将查到的IP地址和网址映射放到你的本地 hosts 文件中即可，例子：140.82.112.4 github.com
3. PS: windows 下 host 默认地址： C:\Windows\System32\drivers\etc