Sniff traffic between 2 interfaces FTTX

[lleachii]

@mofo, welcome to the community.

Just as a note, from personal experience:

• my ONT (Verizon) uses a proprietary single-stranded Layer 1 fiber protocol. So, even if I found a device with fiber SFP, it wouldn't connect to their fiber cable
• my ISP carries: phone, Internet and TV on 3 different wavelengths on that proprietary fiber
• In the United States, this is still considered inside the ISP's network, the demarcation point IS the ONT itself
• If you're trying to flash an ONT with OpenWrt, I don't know of any devices that have been hacked

@mofo

What I want to do, if possible, is to bridge 3 ethernet ports on the Openwrt device, and connect to each one of them the ONT, the router and a PC with wireshark to sniff the traffic.

How do I manage to do that?

• Yes, but on my ONT, only one MAC is recognized to get an address via DHCP, so be careful. I sniff by mirroring the WAN port to another port on my device - then run Wireshark on that.

Also see this thread:

Is there any GPON ONT are supposed by openwrt/LEDE

I will guess that you meant "supported." I surmise not; but check the Table of Hardware. In my nation ONTs are owned by the ISP (my ISP's is delivered Internet in MoCA coax Ethernet or in RJ-45 Ethernet); but I understand in some nations like Germany, they are owned by the user.

and

Solution for FTTX Networks

Hello. My internet connection cames over Fiber Optical and then connects to a router/ optical network terminal/ GPON terminal. Now when optical cable is connected and ONT have internet I can connect ethernet ports to devices where I need internet. I tried to find a firmware for my ONT but I can not find any. Can you advice what ONT I can buy that support OpenWRT firmware or any other hardware/sofware solutions ?

Hope this helps.