Where does a MoCA POE filter go?

In most cable internet/TV homes, install the MoCA POE (point-of-entry) filter where coax enters the home, before the first splitter that feeds the in-home coax runs.

Do I need a POE filter if I have fiber internet?

If there is no provider coax feed connected to your in-home coax, it may be optional. But it can still improve signal isolation on a messy coax tree, and you may still want one if your coax connects to any shared/antenna/building coax.

Can the wrong POE filter placement break MoCA?

Yes. Placing the filter behind a splitter or on the wrong coax leg can weaken MoCA paths or isolate parts of the coax network, leading to drops or poor speed.

MoCA POE filter placement

⏱8 min read•Updated Feb 15, 2026

A MoCA POE (Point-of-Entry) filter is one of the cheapest parts in a MoCA setup — and it’s also one of the easiest to install incorrectly. The placement matters because the filter is doing two jobs: (1) keeping MoCA signals inside your home’s coax network, and (2) improving MoCA reliability by reflecting MoCA energy back into the coax ‘tree’.

Quick answer

Most cable internet/TV homes: install the POE filter at the coax entry point (where the provider line enters), before the first splitter. If you put it behind a splitter or at the wrong jack, MoCA can get weaker or behave inconsistently.

What "Point-of-Entry" actually means

"Point-of-entry" is the first place your home’s coax connects to the provider side. In many homes, this is a demarc box on an exterior wall, a structured media panel, or a splitter panel where the drop line feeds your in-home coax runs.

The 3 common home layouts (and where the filter goes)

1) Cable modem only (no TV)

You still typically have a provider coax feed coming in.

Filter location: on the incoming provider line, before the first splitter.
If the modem is on a dedicated line: the filter still goes on the entry feed, not just on the modem leg.

2) Cable modem + cable TV boxes

This is the classic “MoCA can get weird” setup if splitters/amps are wrong.

Filter location: entry feed — before any splitter that feeds rooms.
Note: old amplifiers and low-frequency splitters can block MoCA. Start with splitters & filters.

3) Fiber internet (coax is in-home only)

If there is no provider coax feed connected, the “entry point” may not exist in the same way.

Filter: often optional, but it can still help on messy coax trees by isolating reflections.
If your coax plant connects to an OTA antenna system or shared building coax: treat that connection as the entry point.

What happens if you place it wrong?

Filter behind a splitter: you can accidentally exclude some coax runs from the MoCA network (or make the path lossy).
Filter at a random wall jack: it may do nothing for keeping signals in-home, and it won’t help stability.
No filter on cable ISP feed: MoCA signals can leak back toward the provider side, sometimes reducing link quality and (in rare cases) causing conflicts with neighbors if you share coax infrastructure.

How to find your entry point (practical steps)

Locate the coax drop: look for where coax enters the home (demarc box, utility room, structured media panel).
Find the first splitter: it’s usually the one that fans out to multiple rooms.
Install the filter: on the input of that splitter (between the drop line and the splitter).
Retest: confirm MoCA link lights, then run a quick speed/latency test.

Tip

If you can’t find the entry point quickly, don’t guess. Use the MoCA troubleshooting checklist to work backwards from symptoms, and reference MoCA for beginners for diagrams.