# Source

Site [llms.txt](/llms.txt)

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## Source Attributes

**Attributes:**

| Key | Stability | Value Type | Description | Example Values |
| --- | --- | --- | --- | --- |
| <a id="source-address" href="#source-address">`source.address`</a> | ![Development](https://img.shields.io/badge/-development-blue) | string | Source address - domain name if available without reverse DNS lookup; otherwise, IP address or UNIX domain socket name. [1] | `source.example.com`; `10.1.2.80`; `/tmp/my.sock` |
| <a id="source-port" href="#source-port">`source.port`</a> | ![Development](https://img.shields.io/badge/-development-blue) | int | Source port number | `3389`; `2888` |

**[1] `source.address`:** When observed from the destination side, and when communicating through an intermediary, `source.address` SHOULD represent the source address behind any intermediaries, for example proxies, if it's available.