conntrack
Interact with the Netfilter connection tracking system.
TLDR
List all currently tracked connections
$ conntrack --dump
Display a real-time event log of connection changes
$ conntrack --event
Display a real-time event log of connection changes and associated timestamps
$ conntrack --event -o timestamp
Display a real-time event log of connection changes for a specific IP address
$ conntrack --event --orig-src [ip_address]
Delete all flows for a specific source IP address
$ conntrack --delete --orig-src [ip_address]