libnetfilter_conntrack

API library for querying kernel connection tracking state table

brewmacoslinux

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About

Library providing an API to the in-kernel connection tracking state table

monitor active network connections in real time$ conntrack -L

list all TCP connections currently tracked by kernel$ conntrack -L -p tcp

remove a specific connection from tracking table$ conntrack -D -p tcp --orig-src 192.168.1.100 --orig-dst 10.0.0.1

display connection statistics and summary$ conntrack -S

flush all tracked connections from memory$ conntrack -F