If you find yourself behind a bogue proxy when working with Grails, you might find it difficult to download various plug-ins. Nevertheless, the Grails team already solved this problem for you — simply issue the set-proxy command via the command line and a nifty script will prompt you for any required credentials.

Once you finish configuring your proxy’s settings, Grails will create a file dubbed ProxyConfig.groovy in your .grails/scripts directory which contains all required information and which will be leveraged by Grails going forward — for example, in downloading and installing plug-ins.