Protecting 1Panel from Known Vulnerabilities with SafeLine WAF

#safeline #waf #1panel #beginners

When running modern server panels like 1Panel, security should always be a top priority. One common attack vector is SQL Injection, where attackers try to manipulate database queries through crafted inputs. In some cases, malicious payloads can even be hidden inside HTTP headers, such as the User-Agent.

SafeLine WAF provides an effective way to filter out such malicious requests. This guide shows how you can configure SafeLine to block SQL injection attempts against 1Panel.

Why This Rule Matters

Attackers often insert single quotes (') or other special characters into request headers, attempting to exploit vulnerable applications.
For example:

User-Agent: Mozilla/5.0'

If the backend application does not properly sanitize input, this could trigger SQL injection.

With SafeLine’s detection and filtering capabilities, such requests can be blocked before they ever reach 1Panel.

SafeLine Rule Overview

In this case, the rule is configured as follows:

Type: Blacklist
Name: UserAgent SQL Injection
Match Condition: Header User-Agent contains '
Applicable Versions: 7.3.0 ~ latest

This means any request with a single quote in the User-Agent header will be denied.

How to Add the Rule in SafeLine

Log in to SafeLine Dashboard
Access your SafeLine WAF management panel.
Go to Allow & Deny Section
In the menu, select Allow & Deny to manage your custom rules.
Add a Blacklist Rule
Create a new Deny Rule for the request header:

Condition: User-Agent contains '
Action: Deny

You can configure it like this (screenshot example can be placed here).

Benefits of This Protection

Blocks malicious headers before they reach your 1Panel server
Prevents SQL injection attempts via User-Agent
Lightweight and efficient filtering without affecting normal traffic

Conclusion

By adding this simple blacklist rule, you can significantly improve the security of your 1Panel environment. SafeLine WAF makes it easy to configure such protections, ensuring that your infrastructure remains resilient against common SQL injection attempts.