github dns解析访问异常 现象 github访问时好时坏，github头像不能打开 原因 查询github解析地址是52.74.223.119时可用，13.250.177.223，13.229.188.59等地址是不可用 github头像是githubusercontent.com地址，一样解析后不能访问 解决 本机配置host 52.74.223.119 github.com www.github.com 52.74.223.119 gist.github.com 199.232.28.133 assets-cdn.github.com 199.232.28.133 raw.githubusercontent.com 199.232.28.133 gist.githubusercontent.com 199.232.28.133 cloud.githubusercontent.com 199.232.28.133 camo.githubusercontent.com 199.232.28.133 avatars0.githubusercontent.com 199.232.28.133 avatars1.githubusercontent.com 199.232.28.133 avatars2.githubusercontent.com 199.232.28.133 avatars3.githubusercontent.com 199.232.28.133 avatars4.githubusercontent.com 199.232.28.133 avatars5.githubusercontent.com 199.232.28.133 avatars6.githubusercontent.com 199.232.28.133 avatars7.githubusercontent.com 199.232.28.133 avatars8.githubusercontent.com # 13.229.188.59 github.com www.github.com # 不能访问 # 13.250.177.223 gist.github.com #不能访问 # 13.229.188.59 gist.github.com #不能访问 IP根据地区不同，访问情况也不一样，需要nslookup，dig，tracert，ping等工具测试不同的IP 使用ipconfig /flushdns刷新本地dns缓存 使用https://www.ipaddress.com查询github的IP 使用路由器dnsmasq配置解析 自定义dnsmasq address=/.github.com/52.74.223.119 address=/www.github.com/52.74.223.119 address=/github.com/52.74.223.119 address=/.githubusercontent.com/199.232.28.133