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fix(tuto): fix issue with protocol specification #4321

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Jan 30, 2025
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fix(tuto): fix issue with protocol specification #4321

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8 changes: 6 additions & 2 deletions tutorials/installation-uncomplicated-firewall/index.mdx
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Expand Up @@ -9,7 +9,7 @@ tags: Firewall UFW port-25
categories:
- instances
dates:
validation: 2024-12-13
validation: 2025-01-30
posted: 2018-07-18
---

Expand Down Expand Up @@ -129,9 +129,13 @@ As the firewall is running now, it is possible to add more rules to it:
Allow the connection to port 25 (SMTP) via TCP to the server:

```code
sudo ufw allow 25/TCP
sudo ufw allow 25/tcp
```

<Message type="tip">
The protocol specification (`tcp`) is case-sensitive. Make sure to use only lowercase letters when specifying the protocol.
</Message>

## Deleting rules

Over time, you may recognize that some of the rules you defined previously do not match your requirements anymore.
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