NAT loopback problem on Google Nest Wifi pro

[stefanmechelen]

So we've got a router/modem from Telenet in bridge modus (it's the modem from my local internet provider called Telenet (Belgium).

Behind that is a Google nest wifi pro router in NAT modus.

And there's a second nest wifi pro router acting as an Acces Point in bridge modus.

I've got 3 Synology nas devices. Each pointing to a post,

nas 1 --> 5001

nas 2 --> 5015

nas 3: --> 5025

I've 3 ports open in Gogole Home wifi settings 5001-5001, and so on.

Now xxx.myds.me:5015 works fine from outside my network. but not from the inside.

Some people say it's nat loopback (which I didn't have on my previous google nest wifi setup by the way).

How do I solve this because it's driving me crazy?

[olavrb]

How are the Synology NAS-es connected? By wire to an unmanaged switch behind the primary Nest Wifi unit?

[stefanmechelen]

Yes. I could manage the netgear switch, but I left it unmanaged.

[olavrb]

What exact switch? What do you mean by "I could manage the netgear switch, but I left it unmanaged"?

[stefanmechelen]

The switch ain't going to be the problem and I meant exactly what i said, it's a manageble switch from netgear but I use it unmanaged. The problem is the Google Nest Wifi Pro router not handling nat loopback properly.

[olavrb]

Alright, I've understood now that the lack of NAT loopback in itself is a peoblem with Nest Wifi Pro reported by multiple.

Using a managed switch could be too, but if you disable conflicting features like loop detection/ prevention, and forward BPDU prevention, it should be good.

• https://www.reddit.com/r/GoogleWiFi/comments/qpurq8

[Jhonleanmel]

Hey folks, 

We appreciate your help here, @olavrb.
@stefanmechelen, I wanted to follow up and see if you are still in need of any help. Please let me know if you are still having any concerns or questions from here, as I would be happy to take a closer look and assist you further.

Thanks,
Mel

[stefanmechelen]

Yes please, still doesn't work to reach my nas from within the nework using the xxx.myds.me:xxxx (port number) which worked like a charm with the previous google wifi Nest

[Jhonleanmel]

Hi stefanmechelen,

Could you try to connect the second Google Nest Wifi Pro directly from the main point instead of the switch. This is to isolate the issue.

Best,

Mel

[stefanmechelen]

there's no cable in my living room and there's only one direct nat connection possbile to my knowledge from the isp's modem to the google router

[Jhonleanmel]

Hi stefanmechelen,

I'm sorry to hear that you're still having an issue with your Google Nest Wifi. We'd like to take a deeper look into this — could you fill out this form and let us know once you're done?

Thanks,
Mel

[stefanmechelen]

Thx for the reaction. Filled out the form.

[Jhonleanmel]

Hey stefanmechelen, 

We got your form — thanks for filling it out. Keep your lines open as our team will reach out to you via email anytime soon. 

Also, please continue the conversation there as this thread will be locked after 24 hours.

Cheers, 
Mel

[Seion]

Same issue.

But also my port forward don't stay working.

https://www.reddit.com/r/GoogleWiFi/comments/yl5xej/issue_with_port_forwards/