# Zeek: analyze a packet capture



Analyze a packet capture.



## 1. Run the example



[Download the Zeek example](https://www.security.run/docs/examples/zeek.zip). Extract it, install `httpx`, set your API URL and token, then run `python client.py`. The client uploads the included inputs, submits the command, and saves the result under `results/RUN_ID`.



## 2. Check the result



Read conn.log for the connection record produced using the supplied Zeek script.



Read the native exit code and cleanup status printed by the client. [Read results and save reports](https://www.security.run/docs/visibility.html) explains the returned files.



## 3. Use your own inputs



Edit `example.json` to change the command arguments, requested outputs or deadline. Replace the files under `inputs/` with your own data, keeping the staged paths aligned with the command. The client creates the artifact IDs for you; illustrative IDs shown here must not be copied into a live request.



### Files used by this example



- `capture.pcap`

- `custom.zeek`



The example uses supplied files or the disposable execution environment. Nothing from the environment carries into a later run unless you request and reuse its output.



Qualified version: `9.0.1`. Commands: `zeek`, `zeek-cut`, `zeek-config`, `zeekctl`, `zeek-client`, `zkg`, `spicyc`, `spicyz`, `spicy-driver`, `spicy-dump`, `spicy-build`, `spicy-config`, `hiltic`, `hilti-config`, `binpac`, `capstats`, `trace-summary`.



- Offline packet analysis is available; live capture requires an executor with capture capabilities. Additional packages may need a compiler and reachable package sources.



Inspect `GET /v1/tools/zeek` for the current installed version and readiness. The published snapshot has 1 functional case(s), plus timeout and cancellation checks. These examples demonstrate the native path; other flags and inputs are supported within the tool’s runtime limits.

## Command submitted by the example

```json
{
  "tool": "zeek",
  "timeout_seconds": 90,
  "invocation": {
    "args": [
      "-C",
      "-r",
      "capture.pcap",
      "LogAscii::use_json=T",
      "custom.zeek"
    ],
    "outputs": [
      "conn.log"
    ],
    "success_exit_codes": [
      0
    ],
    "executable": "zeek",
    "files": [
      {
        "path": "capture.pcap",
        "artifact_id": "artifact_aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
        "executable": false
      },
      {
        "path": "custom.zeek",
        "artifact_id": "artifact_aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
        "executable": false
      }
    ]
  }
}
```