🛡️ Pattern-based Intrusion Detection System using Finite Automata

This is a simple web-based Intrusion Detection System (IDS) built using Streamlit and Python. It scans log files for suspicious patterns using both Deterministic Finite Automata (DFA) and Regex-based scanning.

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🚀 Features

• ✅ DFA-based detection of repeated login failures (e.g., 3 consecutive login failed)
• ✅ Regex detection of:
  • Unauthorized Access attempts
  • SQL Injection patterns (e.g., SELECT * FROM ...)
  • Suspicious IP activity (192.168.1.X)
• ✅ Web interface built with Streamlit
• ✅ Works with raw log file text input
• ✅ Deployable on Streamlit Community Cloud, Replit, or locally

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🔧 Technologies Used

• Python 3.x
• Streamlit
• Regular Expressions (re)
• DFA logic implemented in Python
• Pyngrok (optional, for localhost tunneling)

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💻 How to Run Locally

1. Clone the repo

git clone https://github.com/your-username/dfa-streamlit.git
cd dfa-streamlit