- https://en.wikipedia.org/wiki/Port_mirroring
- jpillora/go-tcp-proxy#23
- https://www.zupzup.org/go-port-forwarding/index.html
- https://github.com/codeexpress/tcpmirror
- https://github.com/gherlein/gonetmon
- https://medium.com/swlh/traffic-mirroring-with-linux-tc-df4d36116119
- https://adamkuj.net/blog/2016/05/18/pro-tip-port-mirroring-in-linux/
- https://superuser.com/questions/1289166/mirror-all-traffic-from-one-port-to-another-on-localhost-using-iptables
- https://help.ubuntu.com/community/NetworkMonitoringBridge
- https://askubuntu.com/questions/1295824/how-to-mirror-traffic-on-one-interface-to-another
- https://github.com/rvineyard/WRT-SPAN
- https://talosintelligence.com/daemon
- https://github.com/platinum-PT/MIRROR/blob/master/mirror.c C program to mirror packets
- https://github.com/mmaraya/port-mirroring OpenWrt package for copying network packets without iptables
- https://github.com/Akagi201/port-mirroring OpenWRT package (the same?) Uses TZSP
- https://docs.wallarm.com/admin-en/mirror-traffic-en/
- https://unix.stackexchange.com/search?q=iptables+port-mirroring iptables -J TEE
You can emulate a hardware mirroring with the ProxMox https://pve.proxmox.com/wiki/Main_Page