DNS is an address book, not a trust badge
Understand what a domain lookup tells you and why a correct answer does not guarantee a safe site.
DNS helps find a destination; it does not evaluate the destination’s intentions.
The working idea
DNS helps find a destination; it does not evaluate the destination’s intentions.
The goal is not to guess the answer faster. It is to make a decision that another person can understand and repeat.
What to check
Learn the roles of resolver, authoritative server, and cached answer. Keep an eye on the difference between a domain name and the service you actually reach.
The goal is not to guess the answer faster. It is to make a decision that another person can understand and repeat.
A realistic example
A lookalike domain can resolve perfectly and still be hostile. A failed lookup may be a local network problem rather than an attack.
Good security work usually becomes visible through notes, tests, and the questions you decide to ask next. Keep the first iteration small.
What to avoid
Do not treat a DNS record, a lock icon, or a familiar-looking name as proof that content is trustworthy.
Good security work usually becomes visible through notes, tests, and the questions you decide to ask next. Keep the first iteration small.
Use a diagnostic tool on a domain you own and compare answers from two resolvers.
Good security work usually becomes visible through notes, tests, and the questions you decide to ask next. Keep the first iteration small.
