IONIC - Erro na instalacao do cordova e do ionic

$ npm install -g ionic cordova
npm ERR! Windows_NT 6.1.7601
npm ERR! argv "C:\\\\Program Files\\\\nodejs\\\\node.exe" "C:\\\\Program Files\\\\nodejs\\\\node_modules\\\\npm\\\\bin\\\\npm-cli.js" "install" "-g" "ionic" "cordova"
npm ERR! node v6.9.4
npm ERR! npm v3.10.10
npm ERR! code ETIMEDOUT
npm ERR! errno ETIMEDOUT
npm ERR! syscall connect

npm ERR! network connect ETIMEDOUT 151.101.192.162:443
npm ERR! network This is most likely not a problem with npm itself
npm ERR! network and is 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! Please include the following file with any support request:
npm ERR! C:\\Users\\jose.netto\\npm-debug.log