iPhone Proxy auto-configuration with username / password
HTTP GET logins have you include your username and password in the URL. For example, if you're using the fictional proxy that's located at www.an-example-proxy.com/proxy-login, and you were instructed to use port 3333, and your username is foo, and your password is bar, then you would put http://foo:bar@www.an-example-proxy.com:3333/proxy-login in the URL field on the Auto tab under Settings &gt; WiFi &gt; ESSID (Network Name) &gt; HTTP Proxy (this doesn't sound too much like an automatically configured proxy to me, though, but this should get you logged on).