How to set up a second-level domain name? Super detailed operation steps and precautions

For webmasters who build and manage websites, second-level domain names are an important tool to expand the website structure and realize content partition management. Reasonable setting of second-level domain names can not only make the website structure clearer, but also carry out refined operations for different business sectors. This article will provide practical guidance for webmasters with different technical foundations from pre-preparation, platform operation, analysis and verification to post-maintenance.

What preparations should be made before setting up a second-level domain name?

before configuring the second-level domain name, making early preparations can effectively avoid operation errors and improve setting efficiency.

1, clarify the use of second-level domain names

first to determine the purpose of the second-level domain name, such as for building a blog board, e-commerce mall, forum community or testing environment. Different scenarios correspond to different second-level domain name naming logic, blog can use blog prefix, e-commerce plate can use shop prefix, clear naming is convenient for users to remember, but also conducive to later management.

2. Confirm the administrative authority of the main domain name

second-level domain name relies on the main domain name, so it is necessary to ensure that it has the full management authority of the main domain name, including domain name resolution authority and console operation authority. If the main domain name is registered through a third-party platform, log in to the registrar background in advance to confirm that it can enter the domain name management interface normally to avoid setting interruptions due to insufficient permissions.

3, prepare the target server or space

the second-level domain name eventually needs to point to the corresponding server or virtual space. To confirm the server's Internet Protocol Address, port number and other information in advance, if you use the virtual space, you need to obtain the permission of the space-bound domain name. At the same time, it is necessary to ensure that the configuration of the server or space can meet the operation requirements of the corresponding business of the second-level domain name, and avoid problems such as access cards.

2. Mainstream platform second-level domain name setting operation steps?

the current mainstream domain name registration platform and Cloud as a Service platform provide a visual second-level domain name setting interface, the following is the specific operation process of the two commonly used platforms.

1, domain name registrar platform setup process

take the domestic mainstream registrar as an example, after logging in to the background, enter the "Domain Name Management" page, find the corresponding main domain name and click the "Resolution" option. Click "Add Record" on the resolution interface, select "A Record" or "CNAME Record" for the record type, A Record points to the server IP, CNAME Record points to the domain name alias. Fill in the prefix of the second-level domain name in the host record column. For example, if you want to set blog.example.com, fill in blog, and finally save the settings.

2, Cloud as a Service platform setup process

If you use the console of Cloud as a Service to manage the domain name, log in to the cloud platform and enter the "Cloud Resolution DNS" module, select the corresponding main domain name to enter the resolution list. Click "Add Record", also select the appropriate record type, fill in the second-level domain name prefix and target address, some platforms also support setting the TTL value. The smaller the TTL value, the faster the resolution will take effect. Generally, it can be set to 600 seconds. Submit and save after completion.

How to verify the resolution effect after the second-level domain name is set?

complete the resolution settings of the second-level domain name, it cannot be directly put into use, and it is necessary to verify whether the resolution is effective to ensure that users can access it normally.

1, use the ping command for basic verification

enter the ping second-level domain name address in the command prompt of the computer, such as ping blog.example.com. If the returned Internet Protocol Address is consistent with the set target server IP, it means that the resolution record of the second-level domain name has taken effect. If the return request timed out or Internet Protocol Address does not match, it may be that the resolution record is not synchronized, and you need to wait 10 to 30 minutes before trying. The resolution synchronization of some platforms takes a certain amount of time.

2, through online analysis tools to verify

if you are worried about the local network affecting the verification results, you can use the online DNS resolution query tool to enter the second-level domain name and query the resolution records of different regions. Such tools can display the resolution results of multiple DNS servers to ensure that the second-level domain name can be resolved normally in different regions, and avoid the problem of abnormal regional access.

3, the actual access to the second-level domain name test

finally enter the second-level domain name in the browser for actual access testing to confirm that the target page can be opened normally, and the page content is consistent with expectations. If there is a 404 error or jump exception, it may be a server configuration problem. You need to check the server's site binding settings to ensure that the second-level domain name is correctly bound to the corresponding site directory.

4. Precautions for setting up and maintaining second-level domain names?

second-level domain name is not set once and for all, the later maintenance and operation details directly affect its stability and use effect.

1, avoid setting up too many second-level domain names

Although the main domain name can set up multiple second-level domain names, too many second-level domain names will disperse the weight of the website and increase the difficulty of management. It is recommended to plan reasonably according to actual business needs, and try to use subdirectories instead of second-level domain names in the same business sector to ensure that the weight of the website is concentrated and improve the search engine ranking of the main domain name and the core second-level domain name.

2. Regularly check the resolution status of the second-level domain name

domain name resolution records may be abnormal due to platform adjustment, server replacement and other reasons, so it is necessary to regularly check the resolution status of the second-level domain name. You can log in to the domain name management background every month to see if the resolution records are normal, or you can set up monitoring tools. Once the resolution is abnormal, you will receive reminders in time to avoid affecting user access.

3, do a good job in the security protection of second-level domain names

second-level domain names are also facing cyber security risks. To configure SSL certificates for second-level domain names to achieve HTTPS access and ensure the security of user data transmission. At the same time, firewall protection should be turned on, and the server or space corresponding to the second-level domain name should be regularly scanned to investigate malicious programs and vulnerabilities. Avoid attacks on the second-level domain name affecting the reputation of the entire main domain name.

To sum up, the setting of the second-level domain name needs to go through four core links: pre-preparation, platform operation, resolution verification and later maintenance. Clear usage scenarios and confirmation of permissions are the basis for setting up. Operating according to the platform process can improve the configuration efficiency, and the verification process can ensure the resolution takes effect. Reasonable maintenance can ensure the long-term stable operation of the second-level domain name. As long as these steps and precautions are followed, the second-level domain name configuration can be easily completed, providing strong support for the expansion of the website architecture and fine operation.