couldn't resolve host api.weixin.qq.com

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1.代理服务器突然出现 couldn't resolve host api.weixin.qq.com 不知原因

2.重启nginx无效-----代码肯定没有动过（之前出现过，过了一天恢复）

3.防火墙关闭状态 -- service iptables status

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4. ping api.weixin.qq.com

curl api.weixin.qq.com

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5.修改dns后 8.8.8.8 可以curl和ping通过

title="couldn't resolve host api.weixin.qq.com" alt="couldn't resolve host api.weixin.qq.com" src="https://cn.js-code.com/res/2019/01-12/17/f9e95c9e6fbfe3e94350581cbc98c764.png" width="442" height="180">

6.还是显示couldn't resolve host api.weixin.qq.com 无法解析主机，重启network后被覆盖

title="couldn't resolve host api.weixin.qq.com" alt="couldn't resolve host api.weixin.qq.com" src="https://cn.js-code.com/res/2019/01-12/17/abae808531ac3ac0d7f61089028af566.png" width="516" height="91">

title="couldn't resolve host api.weixin.qq.com" alt="couldn't resolve host api.weixin.qq.com" src="https://cn.js-code.com/res/2019/01-12/17/23114a299e2a94a6724e149fa0c7cde2.png" width="411" height="140">

7.解决覆盖问题

必须要在/etc /sysconfig/network-scripts/ifcfg-eth0里面最后加上dns的设置。要不然，重启后，肯定使用eth0设置中没有设 dns的相关信息，使/etc/resolv.conf恢复到原来的状态。

(1)若有多个ifcfg-ethX，首先查看一下当前机器的IP地址，先ifconfig 查看系统走的那个配置文件，

title="couldn't resolve host api.weixin.qq.com" alt="couldn't resolve host api.weixin.qq.com" src="https://cn.js-code.com/res/2019/01-12/17/1ea9c303b9ea773623e2148d10344c0f.png" width="302" height="64">

title="couldn't resolve host api.weixin.qq.com" alt="couldn't resolve host api.weixin.qq.com" src="https://cn.js-code.com/res/2019/01-12/17/e2d864e1938c619abb9a156681a9c609.png" width="364" height="242">

（2）添加DNS地址

title="couldn't resolve host api.weixin.qq.com" alt="couldn't resolve host api.weixin.qq.com" src="https://cn.js-code.com/res/2019/01-12/17/0d6ad07f1d1aba071a3deb3a6ddfa072.png" width="333" height="261">

8.resolv.conf设置 （一定要把代理主机写在上部，负责重启后会覆盖）

title="couldn't resolve host api.weixin.qq.com" alt="couldn't resolve host api.weixin.qq.com" src="https://cn.js-code.com/res/2019/01-12/17/275c9afef6208033308552c8d7cb62e2.png" width="411" height="159">

9.设置到此已经代码curl数据不通过

10.找到hosts文件numbering">/etc/hosts，抓出微信地址写进hosts 直接生效不用重启（问题解决）

title="couldn't resolve host api.weixin.qq.com" alt="couldn't resolve host api.weixin.qq.com" src="https://cn.js-code.com/res/2019/01-12/17/0d735d58323952b3c5c2f2db433f719e.png" width="572" height="142">

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