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Anthony Fadly 1 year ago
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## Overview

- DNS - Domain Name System
- [DNS](#dns) - Domain Name System
- Zones
- Resolver
- HINTS File
- Local Setup
- `/etc/nsswitch.conf`
- `/etc/hosts`
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legitimate internet traffic can get through, this was an issue about 15 years
ago, and to this day ICMP is still blocked on many university networks

## DNS

- Top Level Domains: com, biz, edu, net, etc...
- .onion is [not in the Internet DNS root, but with the][2] the tor binary
installed, .onion domain names can be accessed
- Every time you go up a level you add a dot, subdomain.domain.top-level-doman.
- ns1.sandbox.csun.edu. = /edu/csun/sandbox/ns1

[1]: https://en.wikipedia.org/wiki/Ping_of_death
[2]: https://en.wikipedia.org/wiki/.onion

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