My current internet setup is like this (which is common for most people).
fiber line from ISP <-> ISP fiber modem <-> Personal wifi router <-> switch
This is working fine with no issues. But I need to power two devices. I want to reduce this to a single device.
fiber line from ISP <-> Modem+Firewall PC <-> Switch <-> AP1,AP2...
From my initial research, what I need is an SFP module which can be attached to a PC which supports SFP. OPNsense should be able to handle most SFP modules.
What is the community’s take on this? Is this worth the effort? Can I find a mini-PC which supports SFP? Will it be cost effective?
Follow the guides at https://pon.wiki/ for replacing your ISP modem with a sfp module running custom firmware. The sfp module will require some sort of active cooling, I bought a 3D printed bracket and fan from their discord server. You can also get a sfp to Ethernet media converter if your firewall does not have sfp: https://www.amazon.com/gp/aw/d/B0FCFWGWHT
Just use the fiber modem, it’s gonna be a huge pain and fight with your ISP to use your own modem likely.
Those two devices are likely very low power arm devices. I wouldn’t be surprised if a mini pc consumes more power than those two devices. If power is your concern you should probably measure how much they’re actually pulling.
Maybe correct? Though my cable modem gobbles down some 15W… Without even doing the Wifi… So, I bet this isn’t a universal truth, as a Mini-PC will comsume less and provide all kinds of extra services, networking, NAS…
This is working fine with no issues.
It seems like a lot of time and effort with no upside except having one device in the place of two. Is there more you are hoping to accomplish with this proposed change?
Protectli sells opnsense firewalls with SFP+ support. Make sure these can handle gigabit data rates.
You can also terminate SFP with a switch and route that at L2 (VLAN) level to your firewall’s NIC.
Is this worth the effort?
In terms of electricity cost?
I wouldn’t do it myself.
If you want to know whether it’s going to save money, you want to see how much power it uses — you can use a wattmeter, or look up the maximum amount on the device ratings to get an upper end. Look up how much you’re paying per kWh in electricity. Price the hardware. Put a price on your labor. Then you can get an estimate.
My guess, without having any of those numbers, is that it probably isn’t.
This may not be so easy, what protocol does the ISP use over fibre? Honestly the network card that you will probably need might already pull more than the modem.
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Unrelated but do you guys get pussy? Feels like everyone in this sub is a virgin





