grunt proxy issue with corporate proxy?

My system: git bash on Windows 7

// The actual grunt server settings
    connect: {
      options: {
        port: 8000,
        // Change this to '' to access the server from outside.
        hostname: 'localhost',
        livereload: 35729
      proxies: [
            context: '/api',
            host: '',
            port: '80',
            https: false,
            changeOrigin: true,
            rewrite: {
              '^/api': '/api'

The snippet above is part of my grunt file which gets executed when I use grunt serve. What it does is to proxy the backend api to which is a company internal host that gets resolved through our DNS (and for sure some corporate proxies). My issue is that I’m getting a 404 response.

Now, when I place the URL ( in my browser, it properly resolves. My browser users a “proxy.pac” file which – if I’m not wrong – for this endpoint resolves to DIRECT (meaning no proxy). Through grunt connect however it doesn’t seem to be able to resolve it and thus I suspect grunt is using some other proxy.

I verified my git bash doesn’t have any proxy environment variable set (like http_proxy or similar). Also, I tried to hack down a quick nodejs app which uses the http package to execute a GET to and it works:

app.get('/api/v1/contexts', function(req, response){
    var prot = options.port == 443 ? https : http;
    var req = prot.request(options, function(res) {
        var output = '';
        console.log( + ':' + res.statusCode);

        res.on('data', function (chunk) {
            output += chunk;

        res.on('end', function() {
            var obj = JSON.parse(output);

    req.on('error', function(err) {
        //res.send('error: ' + err.message);


Does anyone have an idea where else I could be looking for???

Source: windows

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