I successfully set up the Lamp-server and installed Joomla, and everything is functioning properly.

However, I'm facing a challenge in accessing the site by its domain name from the Internet. Currently, I can only access it through the external IP address of the machine where the site is hosted. This issue is specific to Ubuntu.

Now, I'm wondering how I can associate the domain name of the site so that it can be accessed from the Internet.

As a Linux beginner, I would appreciate your guidance on where I should start investigating this issue.

Do I need to set up a Dynamic DNS on my machine, considering that I have an IR speaker?

Additionally, is there a way to accomplish this without having to buy any additional services, and instead using my own server?

To associate your domain name with your site and make it accessible from the internet, there are a few steps you can take:

1. Register a Domain: First, you'll need to register a domain name with a domain registrar. There are many domain registrars available, and some even offer free domain names for a limited period. Choose one that suits your needs.

2. Configure DNS Records: Once you have a domain name, you'll need to configure the DNS records to point to your server's IP address. This step involves adding an "A" record that associates your domain name with the IP address of your server. Most domain registrars provide a web interface for managing DNS records, where you can make these changes.

3. Port Forwarding: If you're behind a router or firewall, you'll need to configure port forwarding to allow incoming traffic on port 80 (HTTP) and/or port 443 (HTTPS) to reach your server. The exact steps for port forwarding vary depending on your specific router or firewall. Consult the dоcumentation or support resources for your device to set it up correctly.

4. Dynamic DNS (optional): If your external IP address is dynamic (changes periodically), you can set up Dynamic DNS (DDNS) to automatically update your domain's DNS records with your new IP address whenever it changes. This way, you don't have to manually update the IP address every time it changes. There are several DDNS providers available, and some routers even have built-in support for popular DDNS services.

5. SSL Certificate (optional): If you want to secure your site with HTTPS, you'll need to obtain an SSL certificate. Some domain registrars offer free SSL certificates, such as Let's Encrypt. Installing an SSL certificate usually involves configuring your web server, like Apache or Nginx, to use the certificate.

details:

1. Registering a Domain: When registering a domain, you'll need to choose a unique domain name and provide your contact information. Some popular domain registrars include GoDaddy, Namecheap, and Google Domains. Keep in mind that free domain names are often offered as part of hosting packages or promotions, so be sure to read the terms and conditions.

2. Configuring DNS Records: After registering a domain, you'll need to access the DNS management section provided by your domain registrar. Look for an option to modify DNS records or manage DNS settings. Add an "A" record pointing to the IP address of your server. This ensures that requests made to your domain name are directed to your server.

3. Port Forwarding: Most routers have a web interface where you can configure port forwarding. Access the router's administration panel and locate the Port Forwarding or Virtual Server section. Set up rules to forward incoming traffic on ports 80 and/or 443 to your server's internal IP address.

4. Dynamic DNS: If your external IP address changes periodically, setting up Dynamic DNS can help ensure your domain name always points to the correct IP. Many DDNS providers offer free plans, such as DuckDNS, No-IP, or Dynu. Some routers even have built-in support for these services, making it easier to configure.

5. SSL Certificate: To secure your website with HTTPS, you'll need an SSL certificate. You can obtain a free SSL certificate from Let's Encrypt or use a paid certificate from a reputable certificate authority. Once you have the certificate, you'll need to install and configure it on your web server. Instructions for this vary depending on the web server software you're using, such as Apache or Nginx.

When you are able to access through an IP address, it indicates that the 80 port on the router has been reset. To register, visit https://www.noip.com/.

By creating a host at https://www.noip.com/members/dns/host.php on a free account, you can create up to 5 hosts within the available free domain zones.

To set up the client, follow the instructions at http://www.noip.com/support/knowledgebase/installing-the-linux-dynamic-update-client/.

In order to host multiple websites from the same IP address but with different domains, you will need to configure virtual hosts for Apache. More information can be found at http://httpd.apache.org/docs/2.0/vhosts/name-based.html.

most likely, it won't work without making a purchase, as the provider requires opening ports or performing some other technical steps. In general, it's unlikely to be as straightforward as anticipated.
I tried setting up my own SMTP server, but soon realized that it wouldn't progress beyond the local network, necessitating involvement from the internet service provider.

If you've got a domain, head to your registrar's DNS zone and set an A record to your server's external IP - easy peasy. If your IP changes (ISP shenanigans), a free Dynamic DNS tool like No-IP can keep your domain synced up, no extra cost.

Make sure your Ubuntu server's ports (80 for HTTP, 443 for HTTPS) are forwarded on your router and unblocked via ufw-don't miss this step! Tweak your Apache config with a VirtualHost for the domain in /etc/apache2/sites-available/, then reload with systemctl reload apache2. You can totally do this without buying fancy services-your server's got the juice. Start by checking your domain's DNS settings and router config.