Shulou(Shulou.com)06/02 Report--

Three states of domain name quilt wall

a. Domain name is blocked: if the domain name ping cannot open the website (excluding server downtime), you can use a proxy to open it. Generally speaking, the domain name is blocked.

If the website under the domain name has a lot of illegal information, sensitive, and does not rectify, it will be directly dropped by the GFW wall, and the result is that the access to the domain name cannot be opened.

But parsing is normal. At this time, the domain name cannot be used at home, and it can be accessed and used abroad.

b. Domain names are intermittently blocked:

If it can be opened intermittently, if it cannot be opened, it can be opened with a foreign agent, indicating that the domain name is intermittently blocked (of course, this situation may also be caused by the instability of domestic DNS parsing). If the website under the domain name has illegal information, it will not be opened temporarily, and it can be opened again later, it is generally judged as intermittent blocking, and the way to deal with it is to delete the keywords of sensitive information entries.

C.IP blocked: if ping is not available, you can use a foreign agent to open it. It is generally determined that ip is blocked.

Note: generally speaking, if your domain name resolution address is foreign, it will be walled. If you bind a domestic IP, it will not be walled.

1. If you find that a domain name is walled, it is best to parse the domain name immediately and do not keep it on your server.

two。 Most of the domain names are blocked because there are too many illegal keywords on the website, causing the "Great Firewall" on China's international exports to block the information of the domain name. So even if you change your domain name many times, you are in danger of being walled. The cure is to install a keyword blocking system on your server to block all sensitive words, so that you can effectively protect your site from being walled again. If you don't install a keyword blocking system, you should correct the content of the website and check whether the relevant keywords will violate the rules. If you can't check by yourself, the best way is to redo the website to ensure that the domain name will not be dropped by the wall.

3. How to determine whether a domain name is blocked: inaccessible at home, accessible abroad. The test can be accessed by an online web agent.

4. Affected by the wall domain name: after each visitor visits the wall domain name once, it is impossible for each visitor to visit other sites on the same IP within 5-20 minutes. If the domain name is resolved all the way to a certain IP, it will eventually cause the entire IP to be walled.

Attach online ping testing sites throughout the country and all parts of the world to help analyze the situation of the website being walled.

The following is for the whole country

Http://ping.chinaz.com/

Http://www.webkaka.com/Ping.aspx

Http://ping.aizhan.com/

The last one is the world's.

Http://www.just-ping.com/

What if the domain name is walled?

It lasted until 3: 00 p. M. yesterday, and the nightmare of something wrong with the website was finally over. I have been tossing about in the past few hours. When I was at a loss, I was really ready to consider changing the domestic space and then go for the record, the website was suddenly accessible. Space service providers say that there is a problem with telecommunications lines, but in fact, the reason is that the mainframe in Hong Kong is unstable, which is also the price that must be paid for cheap servers.

CheckGFW is a free tool for quickly checking websites to see if they are blocked by GFW. After entering www.net0516.com

The result that I don't want to see is "Unfortunately, this domain name has been walled". Then the free testing tool gives the solution:

What if the domain name is walled?

1. Use domestic servers

2. Bind a new domain name to the server and use a domestic forwarding server to jump the walled domain name to the new domain name.

When using the second method, the weight of the original domain name can be transferred to the new domain name by setting 301 and site-wide forwarding.

If you use a domestic server, you have to put it on record honestly, and for the record, you have to shut down the website for more than ten days. The original choice of the Hong Kong host is to avoid the pain of filing, and it is really remorseful to go back to the origin in a circle.

The loss of replacing a new domain name is even greater. At the beginning, it took a lot of effort to rush to register the domain name www.net0516.com, and the name of the website was all based on this domain name. Moreover, it takes several months to transfer the existing inclusion and weight, which is more painful than changing the domestic server for the record.

Then I thought of the representation. after all, I was a healthy and progressive station, which was neither illegal nor illegal, but there were no such materials and cases on the Internet. when I was discouraged, the website was suddenly accessible. Then use that tool to check, "Congratulations, the domain name is not walled". As a result, after this disaster, I have a better understanding of the wall of the website. Here are some information found on the Internet, which I would like to share with you here:

I. Domain name is blocked: if the domain name ping cannot open the website (excluding server downtime), you can use a proxy to open it. Generally speaking, the domain name is blocked.

If the website under the domain name has a lot of illegal information, sensitive, and does not rectify, it will be directly dropped by the G.F.W wall, the result is that the access to the domain name cannot be opened, but the resolution is normal. At this time, the domain name cannot be used at home, and it can be accessed and used abroad.

Solution:

1. Resolve the domain name to a large domestic station (such as baidu, etc.), and it may be unblocked in a few days, depending on your pr.

2. Change back to domestic space

3. Change the domain name (resolve the walled domain name to the domestic space, and then do 301 redirection to the new domain name to reduce the loss of traffic and weight).

Second, the domain name is intermittently blocked: if it can be opened intermittently, it can be opened with a foreign agent when it cannot be opened, indicating that the domain name is intermittently blocked (of course, this situation may also be caused by the instability of domestic DNS parsing). If illegal information appears on the website under the domain name, it will not be opened temporarily, and it can be opened again later, which is generally judged as intermittent blocking. The way to deal with it is to delete sensitive information keywords.

3. IP is blocked: if ping is not available, you can use a foreign agent to open it. You can generally determine that ip is blocked.

Note: generally speaking, if your domain name resolution address is foreign, it will be walled. If you bind a domestic IP, it will not be walled.

Solutions to blocking, blocking and blocking the domain name of a website

Domain names registered by foreign domain name registrars and website domain names with sensitive information may be blocked, blocked, or walled. This often happens. To judge whether a domain name is walled, you can rule out whether it is a server or not, and check it by means of proxy access. If it can be opened abroad and cannot be opened at home, it will be harmonious. Domain names registered abroad in this situation often cannot be opened in China. For example, godaddy, the world's largest domain name registrar, often has domestic access domain names blocked and blocked if they are registered here. There are also some domain names with sensitive information, which are often blocked. If you find that the domain name is blocked, you have to unblock it. Generally, the domain name that has been walled can be unblocked by the corresponding method.

Change the domestic DNS

If domain names are registered by foreign registrars, most of them will encounter the phenomenon of being blocked, sometimes intermittently shielded, and sometimes for a long time. Faced with the blocking of this situation, the old webmasters of foreign registered domain names are used to it, and there are many solutions online, that is, they can be replaced with domestic DNS, such as dnspod, 51dns, etc., to solve the problem of being blocked.

Second, change the server space

In another case, the IP is blocked directly, and the proxy can also be used to access and test whether the IP is blocked. If the foreign country can open it, but the domestic one cannot open it, the IP is blocked. When the IP is blocked, it is very simple to contact the host vendor to change the IP, or change the server space. General foreign host business, if the IP is blocked, you can send an email and ask him to change your IP address free of charge.

Third, unblock it by changing the domain name or resolving to the large website IP

If it is not the DNS problem or the IP problem, the website itself also contains sensitive information, which is likely to be close to G.F.W. This is really blocked. For example, many well-known large websites are blocked by this. The solution is to change the domain name most directly. If you do not want to change the domain name, you can unblock it by parsing the IP to a normal domestic website. For example, the domain name IP can be resolved to Baidu, Taobao, and so on, and then unsealed.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.