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Incorrect assumption about DNS on port 53 #2773

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ignoramous opened this issue Oct 6, 2024 · 2 comments
Open
2 tasks done

Incorrect assumption about DNS on port 53 #2773

ignoramous opened this issue Oct 6, 2024 · 2 comments
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t:correction content corrections or errors

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@ignoramous
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Affected page

https://www.privacyguides.org/en/advanced/dns-overview

Description

The website goes:

Unencrypted DNS always uses port 53 and always uses UDP.

Unencrypted DNS can use any port (but usually does not by convention / standards) and is supported over TCP (by standards).

Sources

https://datatracker.ietf.org/doc/html/rfc1035#section-4.2

Before submitting

  • I am reporting something that is verifiably incorrect, not a suggestion or opinion.
  • I agree to the Community Code of Conduct.
@ignoramous ignoramous added the t:correction content corrections or errors label Oct 6, 2024
@jonaharagon
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Good catch, not sure why we say that when DNS over TCP is quite common.

@ignoramous
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not sure why we say DNS over TCP is quite common

There seems to be an endless supply of incorrect implementations of FOSS DNS clients (for Android specifically) that don't handle DNS over TCP. So, it isn't just PG.

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@ignoramous @jonaharagon