If your space service provider frequently and irregularly notifies you to change the pointing IP for domain name resolution, or simply forces you to use cname to resolve your domain name, then you should pay attention. This situation generally occurs when using overseas servers. There may be two reasons: 1. The IP is blocked - the server IP is blocked in China and cannot be accessed normally; 2. The service provider changes the server.
The second item is that the service provider replaces the server, which is relatively rare. Generally speaking, this situation is more common when the server is operated by an individual or an Internet company that has not been operating overseas hosts for a long time.
As for the first reason, it is something that happens frequently to almost all overseas service providers. Overseas space operations are absolutely different from domestic virtual hosting methods. Without considerable experience in overseas hosting operations, it is definitely difficult to provide overseas hosting services.
The IP blocking here is only limited to mainland China, that is, only mainland China is blocked, and access outside mainland China is completely normal.
So why are they frequently blocked? The main reason is that service providers lack content management. The Internet environment in mainland China is basically very clean, and a large number of illegal websites have no way out in the country. They have to find another shortcut and place the website in China. Go somewhere else.
As a result, a large number of personal illegal websites, such as pornography, gambling, fraud, and Trojan horse websites, turned to overseas hosts. Those who understand English will find large overseas local service providers, such as the famous Godaddy. However, there are still problems: overseas local service providers cannot run their websites, mainly due to garbled characters and abnormal functions, which are caused by their character sets.
In this way, 90% of domestic illegal website operations will consult China's local overseas hosting operators. The problem is that almost all operators do not regularly inspect and manage website content, let alone adopt illegal content interception systems.
The direct consequence of this is that when China GFW detects illegal content on the international export bandwidth, it will block the corresponding IP, so that all websites on this IP can no longer be accessed within mainland China.
This is why your overseas website is frequently notified of IP changes.
So will changing IP have any impact on your website?
Search engines such as Baidu, Google, Sohu, MSN Live, etc., when they find that your website has changed its IP, they will re-index your website, resulting in a decrease in inclusion and ranking in a short period of time! To put it simply, change it frequently. IP indicates that your website is unstable and not worthy of search engine trust!
What is particularly serious is that when the changed IP is included in the cheating blacklist by the above-mentioned search engines, your website will lose all inclusion and inclusion opportunities, and your website will not be searchable at all in search engines, and your website will become Become an island!
Therefore, friends who use overseas hosts must pay attention to choosing an experienced and well-known large service provider to try to avoid the above situation.