The Network Security Isthe Hottest Topic In the Current Research Scenario. the Information Security Isreally Threatened By Obnoxious Users. With Increasing Vulnerabilities, Causedby Port Scan Attacks, Replay Attacks and Predominantly Ip Spoofing, Targetingservices, the Network Behavior Is Getting Malevolent. But There Is a Lack Ofany Clear Threat Model. the Authors Have Endeavored to Consider This Problem Inorder to Improve the Network Security and Enhance Secure Shell Daemonprotection. a Mechanism, Quickknock, Improving Upon the Potentialities Oftechnologies Such As Port Knocking and Spa (Single Packet Authorization), Usingfirewall and Cryptography, Has Been Proposed.