云服务器npm ETIMEDOUT nodej安装第三方模块老是报错

[root@VM_43_103_centos server]# npm install pm2 -g
npm ERR! code ETIMEDOUT
npm ERR! errno ETIMEDOUT
npm ERR! network request to http://registry.cnpmjs.org/pm2 failed, reason: connect ETIMEDOUT 161.117.70.42:80
npm ERR! network This is a problem related to network connectivity.
npm ERR! network In most cases you are behind a proxy or have bad network settings.
npm ERR! network 
npm ERR! network If you are behind a proxy, please make sure that the
npm ERR! network 'proxy' config is set properly.  See: 'npm help config'

npm ERR! A complete log of this run can be found in:
npm ERR!     /root/.npm/_logs/2019-04-12T11_09_14_420Z-debug.log
[root@VM_43_103_centos server]# npm install -g cnpm --registry=https://registry.npm.taobao.org
npm ERR! code ETIMEDOUT
npm ERR! errno ETIMEDOUT
npm ERR! network request to https://registry.npm.taobao.org/cnpm failed, reason: connect ETIMEDOUT 114.55.80.225:443
npm ERR! network This is a problem related to network connectivity.
npm ERR! network In most cases you are behind a proxy or have bad network settings.
npm ERR! network 
npm ERR! network If you are behind a proxy, please make sure that the
npm ERR! network 'proxy' config is set properly.  See: 'npm help config'

npm ERR! A complete log of this run can be found in:
npm ERR!     /root/.npm/_logs/2019-04-12T12_15_18_453Z-debug.log
 

这两个报错是因为npm安装第三方模块需要访问外网，而云服务器中默认是禁止向外部访问的，这时需要打开外部访问端口就可以了，如图：

接下来再安装第三方模块就可以了

[root@VM_43_103_centos server]# npm install -g cnpm --registry=https://registry.npm.taobao.org
/usr/soft/node-v10.15.3-linux-x64/bin/cnpm -> /usr/soft/node-v10.15.3-linux-x64/lib/node_modules/cnpm/bin/cnpm
+ [email protected]
added 679 packages from 898 contributors in 17.777s
希望对出现同样的问题朋友们有帮助