this post was submitted on 23 Feb 2026
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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?

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[–] tal@lemmy.today 5 points 11 hours ago (1 children)

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.

[–] xavier666@lemmy.umucat.day 1 points 7 hours ago (1 children)

Thanks for the suggestion, I need to get a wattmeter. The ISP modem looks low-powered but it can crank out 500 Mbps.

[–] themachine@lemmy.world 2 points 7 hours ago (1 children)

500Mbps isn't a measurement of electrical consumption

[–] xavier666@lemmy.umucat.day 1 points 6 hours ago

I meant that it's quite efficient. It uses those 15W mobile adaptors for power but still can deliver consistent 500 Mbps.