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An authoritative server is the authority for its zone. It queries and is queried by other name servers in the DNS. The data it receives in response from other name servers is cached. Authoritative servers are not authoritative for cached data.
Are DNS attacks illegal?
DDoS attacks are illegal under the Computer Fraud and Abuse Act. Starting a DDoS attack against a network without permission is going to cost you up to 10 years in prison and up to a $500,000 fine.
How is TTL used in DNS server caching?
When discussing TTL in the context of DNS caching, the basic idea is that cached responses increase efficiency. DNS record information can be cached locally inside a device’s stub resolver or somewhere in the DNS server infrastructure. Cached information circumvents further steps and more quickly delivers responses to DNS queries.
How often do DNS resolvers have to update their TTL?
For example, if the DNS TTL is set to 1800 seconds (30 mins), the resolver will have to regather the details around a website like varonis.com every 30 minutes. If 100 users visit the site in that period, they will all see the same thing, until the resolvers update their TTL.
What kind of attack is DNS spoofing?
DNS spoofing is a computer hacker attack where the data is introduced in DNS resolver’s cache, therefore diverting the internet traffic from genuine ones to fake ones; e.g., the user is sent to malicious site even after entering the correct name. A single attack on the DNS server affects the users attached to that server.
What kind of attack is DNS cache poisoning?
Cache Poisoning Attacks: DNS cache poisoning attack is also known as DNS spoofing. DNS spoofing is a computer hacker attack where the data is introduced in DNS resolver’s cache, therefore diverting the internet traffic from genuine ones to fake ones; e.g., the user is sent to malicious site even after entering the correct name.