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Update ports section in services.md #22368

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Update services.md
chubi-x Apr 4, 2025
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Merge branch 'docker:main' into patch-1
chubi-x Jul 7, 2025
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7 changes: 7 additions & 0 deletions content/reference/compose-file/services.md
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Expand Up @@ -1629,6 +1629,11 @@ in the form:
- `CONTAINER` is `port | range`.
- `PROTOCOL` restricts ports to a specified protocol either `tcp` or `udp`(optional). Default is `tcp`.

>[!CAUTION]
>
>If you do not specify an IP address (such as 127.0.0.1) and it binds to all interfaces then any machine on the same network could
>potentially have access to the container. This could be especially dangerous if the container is exposed to the internet.

Ports can be either a single value or a range. `HOST` and `CONTAINER` must use equivalent ranges.

You can either specify both ports (`HOST:CONTAINER`), or just the container port. In the latter case,
Expand All @@ -1637,6 +1642,8 @@ the container runtime automatically allocates any unassigned port of the host.
`HOST:CONTAINER` should always be specified as a (quoted) string, to avoid conflicts
with [YAML base-60 float](https://yaml.org/type/float.html).



IPv6 addresses can be enclosed in square brackets.

Examples:
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