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

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title date description tags
Clean conntrack states 2018-03-02 How to clean conntrack states
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 :

{{< highlight 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 {{< /highlight >}}