About DNS.....
ham baat krenge DNS k bare me ki DNS kya hota hai. DNS ka poora name hai Domain Name System. Jaisa ki apko v pta hoga ki sabhi website ki apni ek alag IP hoti hai jisse uss website ki pahchan hoti hai or uss IP address se ham uss website tk pahuch skte hai.To jab ham apne browser me kisi website ko open krte hai to hamara computer DNS server ko query bhejta hai or reply me DNS server hame uss required website ka IP address send krta hai or ham uss website ko open kr pate hai.
jaise ki ham apne browser k URL bar me 'www.google.com' search krte hai to hamara computer sbse pahle DNS server ko request send krta hai or sbse pahle ye request root DNS server k pass pahuchti hai or root server k pass bahut sare alag alag server hote hai ex.- .com,.org, .in etc. to root server inme se .com server ko pahchanta hai or query .com server ko send krta hai. Uske baad .com server k pass v bahut sare alag alag server hote hai ex.- facebook, google etc. to yaha pr google server ko choose krta hai or fr google server k pass v bahut sare server hote hai jaise ki mail.google.com. www.google.com etc. to yaha pr google server www. server ko choose krta hai or fr complete query ki information user tk pahuchata hai. or iss tarah hamara website open ho jati hai.
About DNS Spoofing.......
Dosto ab baat krte hai DNS Spoofing ki. jaisa ki abhi hamne jana ki DNS hame query ki information send krta hai to hamara v to koi prmanent address hoga jisse ki hamari pahchan ho skti hai. Means hamara v ek IP address hota hai. To agar hamara IP address koi chori kr le to jab ham kisi website ko surf krenge to hamari query uss person tk jayegi jisne ki hamari IP address ko chori kiya hai iss person ko hm hacker v bol skte hai. Or fr jab uss hacker k pass hamara address hai to fr wo hame koi v information send kr skta hai.jaise ki agar hamne facebook.com k liye query send ki hai to hamre pass wo page open hoga wo reality me facebook.com ka original page ho hi na or hacker hamse hamri sari information uss fishing page se le lega. Iss tarah se koi hacker hamari IP ko spoof krke hamri koi v information le skta hai fr chahe wo kisi facebook account ki detail ho ya fr chahe kisi bank account ki detail ho.
ABOUT DNS AMPLIFICATION ATTACK
Dosto ab ham baat krenge Amplification attack k bare me. Iska direct connection hai DNS spoofing se. Isme jo hacker hota hai wo hamari IP ko spoof krke hamari hi IP address k 4-5 computer bna leta hai or ek sath alag alag website k liye sabhi computer se DNS server ko request send krta hai. Ab DNS server ko lgta hai ki alag alag website ki information mangi gayi hai to wo sabhi websites ki information send kr deta hai. Kyoki wahi same IP hamare computer ki v hoti hai to itni sari websites ki information hamare computer me ek sath aa jati hai or fr hamara browser use smjh nhi pata hai or koi v webpage ko open nhi kr pata hai. Iss tarah ham tb tk kisi website ko open nhi kr skte jb tk ki wo Amplifiction attack hamre computer m ho rha hai.
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