ssh: connect to host github.com port 22: Connection refused_connection refused could not read

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.
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网上的解决办法

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

vim ~/.ssh/config
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Host github.com  
User xxxxx@xx.com  
Hostname ssh.github.com  
PreferredAuthentications publickey  
IdentityFile ~/.ssh/id_rsa  
Port 443
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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.
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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