DX3301-TO - Netmask changed, how to Web Access

Bern · January 6

Dear Community,

I use DX3301-TO in combination with Austrian Provider A1.

Default IP is 10.0.0.138, I want to change the netmask and for this purpose, there is already an option to choose between 10.0.0.0, 192.168.0.0 and a third one which I do not remember.

As soon as the netmask was changed to 192.168.0.0, I cannot connect to the Web IF 10.0.0.138 anymore (which is normal) cause I am not in the same network anymore.

I thought the new internal IP for the modem is 192.168.0.1 (like FritzBox and other similar modems).
Everything works fine (Internet, WiFi) but I cannot reach the Web Access anymore.

I assume that there is a misconfig with the providers firmware / default access when changing the netmask. I cannot find any hint in the documentation and the provider could not help me yet (they have fwd. my request to 3rd lvl).

Do you have any Ideas?

Kind regards

tonygibbs16 · January 6

Hello @Bern

Welcome to the forum.

I think that you have misunderstood what a subnet mask is and what it looks like.

A subnet mask divides the network part of an IP address from the host part of the IP address.

The default subnet mask for a 10.0.0.138 address is 255.0.0.0

Network Chuck has a free video on YouTube about Subnetting at

https://youtu.be/oZGZRtaGyG8?si=4cGvnJAJPdfQv7GK

Note: he does his videos with a lot of humour that not everyone will like.

He also has a whole playlist on IP addressing at https://youtube.com/playlist?list=PLIhvC56v63IKrRHh3gvZZBAGvsvOhwrRF&si=13jNOiU4gkMQv-fx

The user guide can be downloaded from the Resources link of

https://www.zyxel.com/uk/en-gb/products/dsl-cpe/dual-band-wireless-ax1800-vdsl2-gigabit-iad-dx3301-t0

Happy new year and kind regards Tony

Bern · January 6

Hello Tony,

Thanks, but the main issue is not the subnet, its about the changed netmask and the internal ip of modem.

Kind regards

tonygibbs16 · January 6

Hello @Bern

You are welcome.

Have you been able to look at the user guide?

That says that the web configurator IP address default is 192.168.1.1 , which would have a subnet mask of 255.255.255.0 and so the host connecting to it would have have a last octet value between 2 and 254 decimal.

Kind regards Tony

DX3301-TO - Netmask changed, how to Web Access

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