IP spoofing is the creation of Internet Protocol (IP) packets which have a modified source address in order to either hide the identity of the sender, to impersonate another computer system, or both. It is a technique often used by bad actors to invoke DDoS attacks against a target device or the surrounding infrastructure.
In JMeter, you can simulate IP addresses by using the "HTTP Request Defaults" configuration element along with the "HTTP Header Manager" and "User Defined Variables" components.
Steps to do IP Spoofing in Jmeter:
1. Open your JMeter test plan.
2. Add a "HTTP Request Defaults" configuration element by right-clicking on your Test Plan and selecting "Add > Config Element > HTTP Request Defaults."
3. In the "HTTP Request Defaults" panel, enter the target server's IP address or hostname in the "Server Name or IP" field.
4. Add a "User Defined Variables" component by right-clicking on your Thread Group and selecting "Add > Config Element > User Defined Variables."
5. In the "User Defined Variables" panel, define a variable for the IP address you want to spoof. For example, you can set a variable name like `ip_address` and assign a value like `192.168.1.100`.
6. Add a "HTTP Header Manager" component by right-clicking on your Thread Group and selecting "Add > Config Element > HTTP Header Manager."
7. In the "HTTP Header Manager" panel, click on the "Add" button and set the following fields:
- Name: `X-Forwarded-For`
- Value: `${ip_address}` (referring to the variable defined in step 5)
Now, when you send requests using JMeter, it will include the `X-Forwarded-For` header with the spoofed IP address.
Steps to do IP Spoofing in Jmeter:
1. Open your JMeter test plan.
2. Add a "HTTP Request Defaults" configuration element by right-clicking on your Test Plan and selecting "Add > Config Element > HTTP Request Defaults."
3. In the "HTTP Request Defaults" panel, enter the target server's IP address or hostname in the "Server Name or IP" field.
4. Add a "User Defined Variables" component by right-clicking on your Thread Group and selecting "Add > Config Element > User Defined Variables."
5. In the "User Defined Variables" panel, define a variable for the IP address you want to spoof. For example, you can set a variable name like `ip_address` and assign a value like `192.168.1.100`.
6. Add a "HTTP Header Manager" component by right-clicking on your Thread Group and selecting "Add > Config Element > HTTP Header Manager."
7. In the "HTTP Header Manager" panel, click on the "Add" button and set the following fields:
- Name: `X-Forwarded-For`
- Value: `${ip_address}` (referring to the variable defined in step 5)
Now, when you send requests using JMeter, it will include the `X-Forwarded-For` header with the spoofed IP address.