github dnsmasq设置

January 31, 2020

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

github