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FIREWALL


WAHT IS A FIREWALL

1. Firewall Is A Network Security Device Which Is Used To Manage And Filter The Incoming And Outgoing Network Traffic. 

2. Firewall Is Handle Or Filter The Traffic Between Private And Public Network. The Main Function Of Firewall Is To Manage The Unwanted Access Over A Network And Also Out The Unfaith Traffic From The Network. 

3. Firewall Exist Since 1980's To Filter The Packet Over The Network. 

THERE ARE MANY TYPES OF FIREWALL

 1. Packet Filtering Proxy Services · 

2. Stateful Inspection
 
3. Next Generation Firewall.

WORIKING OF FIREWALL

1. Firewall Basically Work To Filter The Traffic And Remove The Malicious Activity Firewall Block The Malicious Access Over A Network It Senses Quickly And Detect The Outside Attack And Also Notify The Legitimate User Over A Network.

2. Especially Next Generation Firewalls, Focus On Blocking Malware And Application-Layer Attacks.

PACKET FILTERING INSPECTION

Packet Filtering Is A Firewall Technique Used To Control Network Access By Monitoring Outgoing And Incoming Packets And Allowing Them To Pass Or Halt Based On The Source And Destination Internet Protocol (IP) Addresses, Protocols And Ports.



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STATEFUL  INSPECTION

A Stateful Inspection Firewall Is A Type Of Firewall That Tracks And Monitors The State Of Active Network Connections. This Allows The Firewall To Make More Informed Decisions About Whether To Allow Or Deny Traffic, As It Can See The Context Of The Traffic And How It Relates To Existing Connections.

Stateful Inspection Firewalls Work By Examining The Headers Of Network Packets. The Headers Contain Information About The Source And Destination Of The Packet, The Protocol Being Used, And The Type Of Data Being Transferred. The Firewall Uses This Information To Track The State Of Each Connection And To Determine Whether The Traffic Is Allowed Or Denied.

Stateful Inspection Firewalls Are More Secure Than Stateless Firewalls, Which Only Examine The Headers Of Network Packets. Stateless Firewalls Can Only See The Source And Destination Of A Packet, So They Cannot See The Context Of The Traffic Or How It Relates To Existing Connections. This Makes Them More Vulnerable To Attacks That Exploit The State Of Network Connections.

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NEXT GENERATION FIREWALL(NGFW)

A NEXT-GENERATION FIREWALL (NGFW) IS A NETWORK SECURITY DEVICE THAT PROVIDES ADVANCED FEATURES BEYOND TRADITIONAL FIREWALLS, SUCH AS APPLICATION AWARENESS AND CONTROL, INTEGRATED INTRUSION PREVENTION, AND THREAT INTELLIGENCE. NGFWS CAN HELP ORGANIZATIONS TO PROTECT THEIR NETWORKS FROM A WIDE RANGE OF THREATS, INCLUDING MALWARE, INTRUSION PREVENTION, AND APPLICATION-LAYER ATTACKS.

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