www/content/blog/commands/clean-conntrack-states.md

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---
title: "Clean conntrack states"
date: 2018-03-02
description: How to clean conntrack states
tags:
- linux
---
## A not so simple command
Firewalling on linux is messy, here is an example of how to clean conntrack states that match a specific query on a linux firewall :
```sh
conntrack -L conntrack -p tcp orig-dport 65372 | \
while read _ _ _ _ src dst sport dport _; do
conntrack -D conntrack proto tcp orig-src ${src#*=} orig-dst ${dst#*=} \
sport ${sport#*=} dport ${dport#*=}
done
```