goreplay
https://github.com/buger/goreplay
tcpcopy
https://github.com/session-replay-tools/tcpcopy
teeproxy
https://github.com/chrislusf/teeproxy
duplicator
https://github.com/agnoster/duplicator
goduplicator
https://github.com/mkevac/goduplicator
nginx mirror
haproxy mirror
https://www.serverlab.ca/tutorials/linux/web-servers-linux/how-to-mirror-your-traffic-with-nginx/
ngnix mirror
