Userscripts.org

// ==UserScript==
// @name           Defeat SonicWALL
// @namespace      http://www.defhoboz.biz/
// @include        http://*
// ==/UserScript==
var host = document.location.hostname;
var href = document.location.href
if (document.title == 'SonicWALL - Web Site Blocked') {
  document.location.href="http://"+host+".nyud.net/"+href.substr(href.indexOf(host)+host.length,href.length)
}