# Conntrack Plugin: proc.plugin Module: /proc/net/stat/nf_conntrack ## 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.