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DNS Cache Poisoning
N/a
8
Computer Science
Undergraduate 4
07/29/2014

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Cards

Term
FQHN
Definition
fully-qualified hose name
Term
DNS lookup
Definition
when either the FQHN or IP address are checked in the DNS table
Term
What does the OS do when it needs the IP address of a host name that isn't in the table.
Definition
It sends out a DNS query to the nameservers, one at a time.
Term
What happens with the nameserver reply?
Definition
The OS trusts the answer and updates the DNS cache table with the information that was received.
Term
What happens in DNS cache poisoning?
Definition
The information in the DNS cache is incorrect
Term
How does DNS cache poisining occur?
Definition
1)OS received the wrong information to its initial query
2)The OS contacted a 'trusted' DNS server that may have been comprimised
Term
What are some of the intended effects of DNS poisoning?
Definition
1)MiTM attacks
2)Route all info meant for P1 to P2
Term
What are some ways to remedy the DNS cache poisoning?
Definition
1)Reboot the PC
2)Clear the DNS cache
3)Verify all entries in the DNS cache files
4)tolerate some inefficiency (have scheduled cleanups)
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