How to merge NetFlow into two collectors?

Question

linux

Greetings!
There was a need to merge the netflow (ipt_netflow, CentOS 6) into two collectors on different hosts (one looks into the billing collector, which saves the logs in its own, tricky format, but it also needs to be duplicated into a regular collector from flow-tools). Does anyone know how to do this, preferably without third-party software that works in userspace (Processors are already loaded with nat). Thank you!

Answer 1

for example:

iptables –I PREROUTING –t mangle –i eth0 –j TEE –gateway 192.168.200.1

Answer 2

https://www.noction.com/blog/flow-samplicators (true in English)