Disable IPv6 for all apps on linux

Submitted by lepton on Wed, 08/09/2017 - 17:06

on Linux using glibc you could edit /etc/gai.conf to always prefer IPv4 over IPv6:

precedence ::ffff:0:0/96 100

“与IPv4兼容的IPv6地址”在低阶32位上携带IPv4地址,格式为：0000:0000:0000:0000:0000:0000:D369:C0AF (其中D369:C0AF为211.105.192.175转换的) “IPv4映射的IPv6地址”用来表示只支持IPv4、而不支持节点的IPv6地址，格式为： 0000:0000:0000:0000:0000:FFFF:D369:C0AF 可简写为::FFFF:D369:C0AF

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