IRCTC has deployed "Nucleus" and "Vikalp" anti-bot systems. These systems fingerprint your browser. If they detect mouse movements that are programmatically too smooth, or requests coming faster than humanly possible, they not only block the IP but also deactivate the IRCTC user ID and file a cyber complaint.
TATKAL (Tenders Automated Tendering System for Kapurthala) is a software application used for e-tendering and e-procurement. It was developed by the National Informatics Centre (NIC) for the Government of India's Ministry of Electronics and Information Technology. The software aims to automate the tendering process, making it more transparent, efficient, and convenient for both buyers and sellers. tatkal software source code
Here is a high-level overview of the TATKAL software architecture: IRCTC has deployed "Nucleus" and "Vikalp" anti-bot systems