You forgot about host files. Those typically over-rule the resolver so you have ... | Hacker News

Hacker Newsnew | past | comments | ask | show | jobs | submit

		jacquesm on Nov 12, 2014 \| parent \| context \| favorite \| on: Systemd-resolved DNS cache poisoning You forgot about host files. Those typically over-rule the resolver so you have to check those as well.

ominous_prime on Nov 12, 2014 [–]

Technically, those only over-rule the resolver from the local system libraries. They do not over-rule DNS queries.

jacquesm on Nov 12, 2014 | [–]

Sure, but your average application does not do a DNS query directly, it simply uses gethostbyname and depends on those local system libraries to figure out what to return.

Consider applying for YC's Winter 2026 batch! Applications are open till Nov 10
Guidelines | FAQ | Lists | API | Security | Legal | Apply to YC | Contact