What is the problem?
Displaying error messages about the server data, address, and operating system can provide valuable information to potential attackers, as it can help them identify vulnerabilities that they can exploit on your system. To prevent this lick of valuable information from being displayed, I suggest you a few steps that you can do in order to prevent it.
- Disable Detailed Error Messages - By default, web servers like Apache, and others will display detailed error messages that include information about the server, operating system, and other system details. You can disable this feature to prevent this information from being displayed.
- Customize Error Pages - Instead of displaying detailed error messages, consider customizing error pages that provide only general information about the error and do not reveal system details.
- Use a Firewall (FW) or Web Application Firewall (WAF) - Implementing a firewall can help block unauthorized access to your server and prevent attackers from identifying vulnerabilities. I saw even organizations that deploy a Proxy to a WAF - not recommended!
- Keep Software Up to Date - Keeping your server software up to date is essential to protecting against known vulnerabilities that can be exploited by attackers.
- Use Strong Authentication (or 2FA, MFA) - Implementing strong authentication measures can prevent unauthorized access to your server and help protect against attacks that exploit vulnerabilities.
- Use Encryption - Encrypting sensitive data can prevent attackers from accessing or stealing valuable information, also using Data decomposition; if they do manage to gain access to your data or server.
- Limit Access by using AD, Duo LDAP, etc. - Limiting access to your server to only authorized personnel can help reduce the risk of an attack.
It's also essential to keep yourself up-to-date and regularly monitor your server for potential security threats and vulnerabilities and to have a plan in place in the event of an attack.
