a subdomain that is no longer used or is not properly configured by the owner of the main domain. This scenario can be exploited by third parties to carry out targeted attacks, such as phishing or malware distribution.

What is a subdomain:
A subdomain is an entity that is part of a main domain and extends its main web address. It is a logical subdivision of the top-level domain that allows you to further organize and structure your main website.
For example, in the case of https://prportfolio.paoloronco.it, “prportfolio” is the subdomain, while “paoloronco.it” represents the main domain. This type of organization allows you to create specific sections or allocate dedicated resources within the main site, such as a blog, an online store or other thematic sections, while maintaining a direct link with the main domain.

Subdomain Search Tools:
There are several tools on Linux that allow you to find subdomains associated with a main domain. Among them, the most used tool is “Sublist3r” that performs a deep scan to identify all subdomains associated with a given domain.

Subdomain Takeover Risk:
Once the subdomains have been identified, it is necessary to check if any of them are vulnerable to Subdomain Takeover. For this purpose, a special tool called “TakeOver” is used. This tool analyzes the identified subdomains, looking for any incorrect or inactive configurations that could be exploited by an attacker to take control.

Subdomain Takeover Prevention:
To prevent the risk of Subdomain Takeover, it is essential to adopt some security practices:

1. Constant Monitoring and Maintenance: It is essential to regularly review the subdomains associated with your domain and remove any that are no longer used or incorrectly configured.
2. Reusing Subdomains: Avoid using subdomains once connected to external services or third-party hosting, as the loss of control over these can be exploited by attackers.
3. Correct DNS Record Configuration: Verify and ensure that the DNS records of unused subdomains are properly configured or redirected to avoid vulnerable situations.
4. Using Security Tools: Using automated security tools, such as “SubOver” or “SubScraper”, can help in scanning and identifying any vulnerable subdomains.

In conclusion, subdomain security is crucial to protect a main domain from potential Subdomain Takeover attacks. Constant monitoring and proactive security practices are essential to mitigate this risk and ensure the protection of the online infrastructure.

All articles on this site are written with the OpenAI ChatGPT AI, model 3.5.
This is an advanced language model that helped generate the site's content, ensuring quality and consistency in the language.