Firewall kya hota hai? Computer Ko Hack Se Kaise Bachata Hai (2025 Guide)

Firewall क्या होता है? | Firewall Kaise Kaam Karta Hai | Types of Firewall | Best Firewall List 2025

🔹 Firewall क्या है?

Firewall ek network security device ya software hota hai jo aapke computer network ko unauthorized access se bachata hai.
Simple words me samjhein to — firewall ek security guard ki tarah hota hai jo decide karta hai ki kaunsa data aapke system ke andar aayega aur kaunsa bahar jayega.

Agar koi hacker ya malicious program aapke system me ghusne ki koshish kare, to firewall use block kar deta hai.
Isse aapka network aur data safe aur secure rehta hai.

 

Firewall

🔹 Firewall Kaise Kaam Karta Hai?

Firewall incoming aur outgoing network traffic ko monitor karta hai.
Ye har data packet ko check karta hai ki wo trusted source se aaya hai ya nahi.

Agar packet suspicious ya unknown source se aata hai to firewall use block kar deta hai.
Agar packet safe hota hai to use allow kar deta hai.

Example:
Jab aap internet par koi website open karte ho, firewall check karta hai ki wo website safe hai ya nhi.
Agar usme virus ya malware hai to firewall us connection ko rok deta hai.

 

🔹 Firewall ke Main Functions

1. 🛡️ Unauthorized Access se Protection – hackers aur malware se network bachata hai.
2. 🌐 Traffic Filtering – incoming aur outgoing data ko check karta hai.
3. 🚫 Malicious Websites Block karna – unsafe websites access hone se rokta hai.
4. 🕵️‍♂️ Network Monitoring – sabhi connections par nazar rakhta hai.
5. 🧱 Virtual Barrier – trusted aur untrusted network ke beech ek wall create karta hai.

 
🔹 Firewall ke Types (Firewall Kitne Prakar Ke Hote Hai?)

Firewalls ke kaafi types hote hain. Niche sabse popular 5 types explain kiye gaye hain

1. Packet Filtering Firewall

• Sabse basic type hai.
• Har data packet ka source aur destination address check karta hai.
• Fast hota hai, lekin detailed inspection nahi karta.

2. Stateful Inspection Firewall

• Ye packet ke saath uske connection state ko bhi track karta hai.
• Advanced protection provide karta hai.

3. Proxy Firewall (Application-Level Gateway)

• User aur internet ke beech ek middleman ki tarah kaam karta hai.
• Har request ko scan karta hai aur unsafe request ko block karta hai.

4. Next-Generation Firewall (NGFW)

• Ye modern firewall hai jisme intrusion prevention, malware detection aur deep packet inspection hoti hai.
• Large organizations me use hota hai.

5. Cloud Firewall

• Ye firewall cloud par host hota hai, jise Firewall-as-a-Service (FaaS) bhi kehte hain.
• Remote aur hybrid networks ke liye best hai.

 

🔹 Best Firewall Software and Hardware (2025)

Aaj ke time me kuch best aur trusted firewall solutions ye hain

🔢	Firewall Name	Type	Best For
1️⃣	Cisco ASA / Firepower NGFW	Hardware	Enterprise networks
2️⃣	Fortinet FortiGate	Hardware + Software	Business & Enterprise
3️⃣	Palo Alto Networks Firewall	Next-Gen Firewall	Large Organizations
4️⃣	Sophos XG Firewall	Software/Hardware	Small & Medium Business
5️⃣	Check Point Firewall	Hardware	High Security Environments
6️⃣	Bitdefender Firewall (Software)	Software	Personal Use
7️⃣	Norton Firewall	Software	Home & Individual Users

 

🔹 Conclusion – Firewall Kyu Jaruri Hai?

Aaj ke digital world me, cyber attacks aur hacking attempts har din badh rahe hain.
Agar aap apna data safe rakhna chahte ho, to firewall ek must-have security tool hai.
Chahe aapka personal computer ho ya business network — firewall ke bina security incomplete hai.