Web site is the solution behind the wall?

　　Domain walls is what does this mean? The wall is the site is firewall shielding the meaning of harmony, general site is the wall is illegal because the site contains a word or sensitive information, or cause, the most intuitive form of expression for the website domain name resolution is working correctly, but the site does not open, how to check whether the domain the method of the wall and the wall is a solution:
　　IIS7 Web site monitoring
　　to check whether the domain wall, DNS pollution detection, speed detection site opens, whether the site was hijacked and so on.
　　Is defined as the wall: the site is blocked by a firewall, leading to domestic users open site;
　　the manifestation of the wall: DNS, the server-side without any problems, but the site is not open;
　　the reason being the wall: The wall is generally because the site contains illegal or sensitive information or cause a word;
　　how to determine whether the wall?
　　Test Method One: Domestic unable to visit the site, then the site is likely to be a wall of;
　　Test Method two: Use the browser to open the site, suggesting "connection reset", the site is also likely to be a wall of;
　　Test Method three: Use the wall detection tools to detect
　　the wall solution
　　solution one: the domain name resolves to the domestic large sites this method might work, not 100% resolved;
　　solution two: in exchange for domestic server, if not for the record, after the domain name for the record, move back domestic general can be solved.