---
title: System Network
slug: litmus-mcp-server/system-network
docTags: 
createdAt: 2026-05-11T21:49:30.359Z
---

# System, Network

Inspect firewall rules, network interfaces, and packet captures on a Litmus Edge.

| Tool                            | Description                                                                               |
| ------------------------------- | ----------------------------------------------------------------------------------------- |
| `get_firewall_rules`            | Return configured firewall rules: ports, protocols, ALLOW / DENY actions.                 |
| `get_network_interface_info`    | Network interface details: IP, MAC, gateway, link status, MTU, speed. Defaults to `eth0`. |
| `get_packet_capture_interfaces` | List network interfaces available for packet capture.                                     |
| `get_packet_capture_status`     | Current packet capture state and list of captured `.pcap` files with metadata.            |
| `start_packet_capture`          | Start a packet capture on an interface. Duration 1-30 minutes.                            |
| `stop_packet_capture`           | Stop an in-progress packet capture.                                                       |

## When to use which

- **Connectivity triage:** `get_firewall_rules` and `get_network_interface_info`.
- **Diagnosing a flaky device:** start a packet capture on the relevant interface with `start_packet_capture`, wait, then `stop_packet_capture` and inspect `.pcap` files listed by `get_packet_capture_status`.
- **Multi-NIC edges:** use `get_packet_capture_interfaces` first to confirm what you can capture on.

Packet captures cap at 30 minutes per run. Pcap files accumulate on the edge until pruned.

## Requirements

- `EDGE_URL`, `EDGE_API_CLIENT_ID`, `EDGE_API_CLIENT_SECRET`.

## Related

- [System, Events](#) - event log captures network-related anomalies.
- [InfluxDB / Time Series](#) - port 8086 must be open in the firewall.