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<!--startmeta
custom_edit_url: "https://github.com/netdata/netdata/edit/master/collectors/proc.plugin/integrations/conntrack.md"
meta_yaml: "https://github.com/netdata/netdata/edit/master/collectors/proc.plugin/metadata.yaml"
sidebar_label: "Conntrack"
learn_status: "Published"
learn_rel_path: "Data Collection/Linux Systems/Firewall"
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message: "DO NOT EDIT THIS FILE DIRECTLY, IT IS GENERATED BY THE COLLECTOR'S metadata.yaml FILE"
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# Conntrack
<img src="https://netdata.cloud/img/firewall.svg" width="150"/>
Plugin: proc.plugin
Module: /proc/net/stat/nf_conntrack
<img src="https://img.shields.io/badge/maintained%20by-Netdata-%2300ab44" />
## Overview
This integration monitors the connection tracking mechanism of Netfilter in the Linux Kernel.
This collector is supported on all platforms.
This collector supports collecting metrics from multiple instances of this integration, including remote instances.
### Default Behavior
#### Auto-Detection
This integration doesn't support auto-detection.
#### Limits
The default configuration for this integration does not impose any limits on data collection.
#### Performance Impact
The default configuration for this integration is not expected to impose a significant performance impact on the system.
## Metrics
Metrics grouped by *scope*.
The scope defines the instance that the metric belongs to. An instance is uniquely identified by a set of labels.
### Per Conntrack instance
This scope has no labels.
Metrics:
| Metric | Dimensions | Unit |
|:------|:----------|:----|
| netfilter.conntrack_sockets | connections | active connections |
| netfilter.conntrack_new | new, ignore, invalid | connections/s |
| netfilter.conntrack_changes | inserted, deleted, delete_list | changes/s |
| netfilter.conntrack_expect | created, deleted, new | expectations/s |
| netfilter.conntrack_search | searched, restarted, found | searches/s |
| netfilter.conntrack_errors | icmp_error, error_failed, drop, early_drop | events/s |
## Alerts
The following alerts are available:
| Alert name | On metric | Description |
|:------------|:----------|:------------|
| [ netfilter_conntrack_full ](https://github.com/netdata/netdata/blob/master/health/health.d/netfilter.conf) | netfilter.conntrack_sockets | netfilter connection tracker table size utilization |
## Setup
### Prerequisites
No action required.
### Configuration
#### File
There is no configuration file.
#### Options
There are no configuration options.
#### Examples
There are no configuration examples.
|
