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CEH Certified Ethical Hacker 312-50: Scan responses
CEH Certified Ethical Hacker 312-50: Scan responses
24
Computer Science
Professional
03/23/2014

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Cards

Term
Full (TCP Connect), initial flag sent
Definition
SYN
Term
Half Open (Stealth / SYN Scan), initial flag sent
Definition
SYN
Term
XMAS, initial flag sent
Definition
FIN/URG/PSH
Term
FIN, initial flag sent
Definition
FIN
Term
NULL, initial flag sent
Definition
No flags set
Term
ACK, initial flag sent
Definition
ACK
Term
Full (TCP Connect), Open Port Response
Definition
SYN/ACK
Term
Half Open (Stealth / SYN Scan), Open Port Response
Definition
SYN/ACK
Term
XMAS, Open Port Response
Definition
No response
Term
FIN, Open Port Response
Definition
No response
Term
NULL, Open Port Response
Definition
No response
Term
ACK, Open Port Response
Definition
RST
Term
Full (TCP Connect), Closed Port Response
Definition
RST
Term
Half Open (Stealth / SYN Scan), Closed Port Response
Definition
RST
Term
XMAS, Closed Port Response
Definition
RST/ACK
Term
FIN, Closed Port Response
Definition
RST/ACK
Term
NULL, Closed Port Response
Definition
RST/ACK
Term
ACK, Closed Port Response
Definition
No response
Term
Full (TCP Connect), special characteristic
Definition
Noisiest but most reliable.
Term
Half Open (Stealth / SYN Scan), special characteristic
Definition
No completion of three way handshake.
Designed for stealth but may be picked
up on IDS sensors.
Term
XMAS, special characteristic
Definition
Does not work on Windows Machines
Term
FIN, special characteristic
Definition
Does not work on Windows Machines
Term
NULL, special characteristic
Definition
Does not work on Windows Machines
Term
ACK, special characteristic
Definition
Used in firewall filter tests
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