68 lines
2.0 KiB
Markdown
68 lines
2.0 KiB
Markdown
---
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title: "Protect a parked domain without email"
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date: 2023-01-05T19:15:00+01:00
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draft: false
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tags: ["How-To","Tech","email"]
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author: "9x0rg"
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hidemeta: false
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ShowReadingTime: true
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ShowPostNavLinks: true
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showtoc: false
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cover:
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image: "/images/"
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alt: "<alt text>"
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caption: "<text>"
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---
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## DNS entries for a parked domain that does not send emails but has a website
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| Hostname | Type | TTL | Data |
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|:------------:|:----:|:----:|:-------------:|
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| `@` | `MX` |`1800`|`0 .` |
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| `@` | `TXT`|`1800`|`"v=spf1 -all"`|
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|`*._domainkey`| `TXT`|`1800`|`"v=DKIM1; p="`|
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| `_dmarc` | `TXT`|`1800`|`"v=DMARC1;p=reject;sp=reject;adkim=s;aspf=s;fo=1;"`|
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### DNS entries explained
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#### Null MX
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Explicitly configure an 'empty' MX record according to [RFC7505](https://tools.ietf.org/html/rfc7505).
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```
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@ 1800 IN MX 0 .
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```
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#### SPF
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Set an an empty policy and a hard fail.
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```
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@ 1800 IN TXT "v=spf1 -all"
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```
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#### DKIM
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```
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*._domainkey 1800 IN TXT "v=DKIM1; p="
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```
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#### DMARC
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Set DMARC policy to reject emails[^1]
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```
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_dmarc 1800 IN TXT "v=DMARC1;p=reject;sp=reject;adkim=s;aspf=s;fo=1;"
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```
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or
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Set DMARC policy to reject mails, but allow reporting to take place[^2]
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```
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_dmarc 1800 IN TXT "v=DMARC1; p=reject; rua=mailto:rua@example.com; ruf=mailto:ruf@example.com"
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```
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## DNS entries for a parked domain that does not send emails
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* Don't use an `A` or `AAAA` record for parked domains;
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* Don't redirect from parked domain `example.com` to the used domain `example.org`, since this encourages users to keep using the parked `example.com`. If a redirect is desirable, make sure to use the proper redirect order in order for HSTS headers to remain effective:
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* redirect `http://example.com` to `https://example.com`
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* when using `HTTPS`, redirect `https://example.com` to `https://example.org`.
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[^1]: **Credit:** akc3n’s [page of notes](https://akc3n.page/gists/#dns)
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[^2]: **Credit:** the [Dutch Internet Standards Platform](https://github.com/internetstandards/toolbox-wiki/blob/main/parked-domain-how-to.md#what-is-a-parked-domain-)
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