Port Forwarding not possible| open but closed | ZyXEL VMG1312-B10A
I have posted the same question over here in the Nextcloud forum, but I think my problem is router related, and so I'm coming to post this here as well.
_________________________________________I use a Raspberry Pi with Nextcloud Server, and I'm getting absolutely insane as I simply cannot open the ports and access from the Internet.
- Local access works well, no issue.
- I use a ZyXEL VMG1312-B10A Router.
If I open ports manually, by loging into the router I cannot reach the NCP from the Internet,
(I'm aware that on the screenshot it's deactivated.)
...and the ports are shown as closed:
If I enable UPnP in the router and use the nextcloud tool to open the ports automatically, I succeed and can reach the server from the Internet.
But I should "disable" UPnP as it poses a security risk.
If I do that, the ports are closed again, and I cannot access the server from the Internet.
What is going on?
My guess is that this is simply not possible with this router and I'd better buy another router.
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