Error in installing cardova in Mac

CFL2-WS-06:~ aamirkhan$ npm install -g cordova ios-deploy

npm ERR! Darwin 14.1.0 npm ERR! argv "node" "/usr/local/bin/npm" "install" "-g" "cordova" "ios-deploy" npm ERR! node v0.12.0 npm ERR! npm v2.5.1 npm ERR! code ETIMEDOUT npm ERR! errno ETIMEDOUT npm ERR! syscall connect

npm ERR! network connect ETIMEDOUT 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! /Users/aamirkhan/npm-debug.log