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DNS攻击与防御-当当网.pdf.md

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DNS

· ID:LION_00 · · CCIE Sec && CISSP

DNS Root

edu

mil

com

isi

darpa usmc cisco

nge

quantico

DNS

DNS

DNS Query

· ·

DNS Query

DNS Amplification

DNS

DNS

DNS

DNS · ·

DNS Refuse

· ·

DNS Refuse

DNS · facebook

203.98.7.65 78.16.49.15 243.185.187.39 93.46.8.89 37.61.54.158 59.24.3.173 159.106.121.75 8.7.198.45 46.82.174.68

DNS · facebook

TCP · facebook

DNS

DNS

DNS

IP IP Transaction ID

NSSERVER DNSSERVER 53 UDP

DNS · Transaction ID 0XFFFF) · PORT (0XFFFF)dig porttest.dns-oarc.net TXT @dns_server_ip

DNS · ·

DNSSEC 0X20 · DNSSEC:Internet IETF DNS IP DNSDNSDNS · : · : DDOS · 0X20: · http://tools.ietf.org/html/draft-vixie-dnsext-dns0x20-00

0x20

DNS

·

DNSSec

·

0X20)

· ,DNSPOD

·

· DDOS

DNS · · · · CPS · ·