Mwan3 how to flush firewall conntrack table?

[reg]

The mwan3 guide states:
As a test, you can quickly flush conntrack outside of mwan3 with conntrack -F

I am running 21.02.3 and when I try to execute conntrack -F, the system reports conntrack not found.

How do I flush the firewall conntrack table?

[reg]

Found it - needed to install the conntrack opkg

[jow]

Actually not, the following will yield the same effect without requiring an additional package:

echo f > /proc/net/nf_conntrack

This is an OpenWrt specific kernel modification.

[reg]

Thanks much!