只是不能用npm安装ember-cli

Question

我正在运行mac osx yosemite 10.10.5＆amp;每当我点击npm install -g ember-cli

时，这就是我得到的

npm ERR! Darwin 14.5.0
npm ERR! argv "/Users/itsfadnis/.nvm/versions/io.js/v3.3.1/bin/iojs" "/Users/itsfadnis/.nvm/versions/io.js/v3.3.1/bin/npm" "install" "-g"     "ember-cli" "--no-optional"
npm ERR! node v3.3.1
npm ERR! npm  v2.14.3
npm ERR! code ETIMEDOUT
npm ERR! errno ETIMEDOUT
npm ERR! syscall connect

npm ERR! network connect ETIMEDOUT 103.245.222.162:80
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/itsfadnis/npm-debug.log

我尝试过以下操作，但没有一个有效：

1. 重新安装节点和npm
2. npm set registry http://registry.npmjs.org
3. 尝试使用不同版本的节点 - v0.12.8，iojs-v3.3.1，v4.4.2，v5.0
4. 没有可选的依赖项npm install -g ember-cli
5. 以管理员sudo npm install -g ember-cli

网络连接绝对正常，我不在代理之后。 任何有关这方面的帮助将不胜感激。感谢。

事实证明，由于我的路由器启用了防火墙，它失败了。禁用它就行了！