I have a problem with proxy services when i need to install any package i get this error: ``` C:\Users\ihab\Desktop\myApp\myApp>npm install -g npm@latest npm ERR! code ENOTFOUND npm ERR! errno ENOTFOUND npm ERR! network request to http://registry.npmjs.org/npm failed, reason: getadd rinfo ENOTFOUND proxy_host proxy_host: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 settin gs. 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! C:\Users\ihab\AppData\Roaming\npm-cache_logs\2017-11-15T13_49_08_4 73Z-debug.log
C:\Users\ihab\Desktop\myApp\myApp>npm --registry http://registry.cnpmjs.org info underscore npm ERR! code ENOTFOUND npm ERR! errno ENOTFOUND npm ERR! syscall getaddrinfo npm ERR! network getaddrinfo ENOTFOUND proxy_host proxy_host: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 settin gs. 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! C:\Users\ihab\AppData\Roaming\npm-cache_logs\2017-11-15T13_51_14_6 81Z-debug.log ``` any solution for this problem please
