One website, with the domain site.com, needs to display the same content for any subdomain name, such as aaa.site.com, bbb.site.com, and others. To accomplish this, there are three necessary actions: adding a DNS A record, changing the Apache configuration, and altering the .htaccess file.

However, the first step posed a problem because there is no control panel on the server and the command line method of adding an A record was unknown. The solution is to use a command that creates a new DNS A record in the terminal. For a VDS Ubuntu, this can be achieved by opening the terminal and typing the following command: sudo nano /etc/bind/db.domain, replacing "domain" with the actual domain name. This opens the DNS zone file, where a new record can be added.

To edit the domain zone, it is necessary to access the NS servers, which may be located externally, such as through a registrar or hosting provider. If the individual has zone administrator rights for site.com, they can easily make the necessary edits. However, if these rights are not present, then there is no solution.

It should be noted that creating an A-record from the command line is not recommended, even though it is technically possible ("echo test IN A 1.2.3.4 >> zone.txt"). Instead, text editors are the preferred method for adding the necessary changes to the domain zone.

Delo Design provides a potential solution to the issue at hand with their code available on Github - multisite. However, the major downside is that there does not appear to be any accompanying documentation to help users utilize the code. Additionally, other platforms such as mycityselector are available on Github, but often have limited functionality in their free versions.

keep in mind that creating a separate CMS for each subdomain would be unnecessary and result in a complicated web of information that would require updates across multiple platforms. It is best to find a comprehensive solution that can handle multiple subdomains within one CMS.

To add a DNS A record without a control panel, you'll generally need access to the DNS configuration of your domain registrar or DNS provider. Here's a general outline of the steps involved:

1. Identify your DNS provider: Determine which service you use to manage your domain's DNS records. This could be your domain registrar or a separate DNS provider.

2. Access your DNS configuration: Log in to your DNS provider's website and find the section where you can manage your domain's DNS records. This is typically labeled as "DNS Management," "DNS Settings," or something similar.

3. Add a new A record: Look for options to add a new DNS record, usually by clicking on a button such as "Add Record" or "Create Record." Select the record type as "A."

4. Enter the details: In the A record creation form, you will need to provide the necessary details. Typically, you'll need to specify the subdomain (such as "aaa" or "bbb"), the IP address you want to point the subdomain to, and any TTL (Time to Live) settings.

5. Save your changes: Once you've filled in the required fields, save the new DNS A record. The changes may take some time to propagate across the internet, so be patient.

It's important to note that the process may slightly vary depending on your DNS provider's specific interface. If you're unsure about the details, it's best to refer to your DNS provider's documentation or contact their support for further assistance.

As for the Apache configuration and .htaccess file changes, it would depend on the specific requirements of your website.


Dynamic subdomains can be a useful feature in web development, allowing you to create customized subdomains on the fly. One way to achieve this is by configuring dynamic subdomains as aliases of the main domain name.

To begin, you need to have control over your domain's DNS settings. Most domain registrars provide a control panel or dashboard where you can manage these settings. Look for an option to manage DNS or edit zone files.

Once you have access to your DNS settings, you can create a wildcard DNS record. In simple terms, a wildcard DNS record is a catch-all rule that forwards all subdomain requests to your main domain.

To set up a wildcard DNS record, create a new DNS record and specify an asterisk (*) as the subdomain value. Set the record type to CNAME (Canonical Name) and point it to your main domain. This tells the DNS server to route any subdomain requests to your main domain.

For example, let's say your main domain is "example.com" and you want to create dynamic subdomains like "sub1.example.com," "sub2.example.com," and so on. By setting up a wildcard DNS record, any request for a non-existing subdomain will be redirected to your main domain, where you can handle it programmatically.

Once the DNS changes propagate, you can start programmatically handling the incoming subdomain requests on your web server. Depending on your server configuration, you can use various methods or frameworks to achieve this.

For example, if you're using Apache HTTP Server, you can set up virtual hosts with wildcard subdomains. This allows you to map each incoming subdomain request to a specific directory on your server. Similarly, other server software like Nginx or Microsoft IIS have their own approaches to handle dynamic subdomains.

Within your server-side code, you can extract the subdomain from the incoming request URL and use it to generate dynamic content or serve different web pages based on the subdomain.


some additional information about configuring dynamic subdomains as aliases of the main domain name:

1. Security Considerations: When implementing dynamic subdomains, it's important to consider security implications. Make sure to validate user input and sanitize subdomain values to prevent potential security vulnerabilities like injection attacks or unauthorized access.

2. DNS TTL: Keep in mind that changes to DNS records may take some time to propagate across the internet due to the Time-to-Live (TTL) value set for your DNS records. The TTL determines how long DNS resolvers can cache your DNS records before querying your DNS server again. Be patient if you don't see immediate results after making changes to your DNS configuration.

3. Load Balancing: If you have a distributed infrastructure or want to distribute incoming subdomain requests across multiple servers, you can leverage load balancing techniques. This involves configuring your DNS to return different IP addresses for each subdomain request, distributing the traffic evenly among multiple servers.

4. Wildcard SSL Certificates: If you plan to use SSL/TLS for secure connections on your dynamic subdomains, consider using wildcard SSL certificates. These certificates secure all subdomains under a specific domain with a single certificate. Certificate Authorities (CAs) typically offer wildcard certificates with their own validation processes.

5. Subdomain Routing: Depending on your programming language or framework, you may need to implement subdomain routing within your web application. This involves configuring your application to recognize and handle incoming requests with different subdomains accordingly. There are frameworks like Flask (Python), Express.js (Node.js), Django (Python), or Ruby on Rails (Ruby) that provide mechanisms for handling subdomain-based routing.