fang5566：不单电信，（联通）网通、铁通都有。
我记得我这里打开网页都会先连到61.148.xx.xx的ip地址 然后才打开网页，这个ip地址也是电信的。回到原帖

// ==UserScript==
// @name         Remove ISP Redirection
// @description  Remove ISP(China Telecom) Redirection
// @include      main
// @author       Cye3s
// @version      1.0.20090621
// ==/UserScript==

var ispHijackObserver = {
	observe: function(subject,topic,data){
		if(topic != 'http-on-examine-response') return;
		var http = subject.QueryInterface(Components.interfaces.nsIHttpChannel);
		if (http.responseStatus.toString() != '302') return;
		try{var url = http.getResponseHeader('Location');}catch(e){return;}
	  if (/http:\/\/[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}\/req.php\?str1=[0-9]+&t=[0-9]+&str2=/.test(url)){
		  http.setResponseHeader('Location',url.substring(url.lastIndexOf("&str2=http://")+6,url.length),false);
	  }
  },
  register: function() {
  	this.initialized = true;
  	Components.classes["@mozilla.org/observer-service;1"]
  	.getService(Components.interfaces.nsIObserverService)
  	 .addObserver(ispHijackObserver, "http-on-examine-response", false);
  },
  unregister: function() {
  	Components.classes["@mozilla.org/observer-service;1"]
  	.getService(Components.interfaces.nsIObserverService)
  	 .removeObserver(ispHijackObserver, "http-on-examine-response");
  }
}

ispHijackObserver.register();
window.addEventListener("unload",ispHijackObserver.unregister,false);