Create a connection with a fixed IP address

https://help.ubuntu.com/stable/ubuntu-help/net-fixed-ip-address.html.en

https://help.ubuntu.com/stable/ubuntu-help/net-findip.html.en
This will help you fill out your IP adddress and get your link with your ISP. [internet service provider]
https://help.ubuntu.com/lts/ubuntu-help/net-manual.html.en

https://help.ubuntu.com/stable/ubuntu-help/net-manual.html.en
https://help.ubuntu.com/lts/ubuntu-help/index.html

https://linuxconfig.org/how-to-configure-static-ip-address-on-ubuntu-20-04-focal-fossa-desktop-server
A static IP address is the same as a "fixed IP address". And yes it is called a prefix. As stated below.

Why do you want to set a fixed IP address instead of DHCP?

For the confusion between "netmask" and "prefix":
In IPv4 the limits for directly reachable addresses are called "netmask", and its equivalent in IPv6 is called "prefix".

"The second question is about finding out the data to enter in the following: ..."

These data have to be defined by your network provider and depend on your local circumstances.
You have to ask your provider.

Hi

Thanks for your reply.

I wanted a fixed Ipv6 address for the reason explained in the quote below from the Ubuntu documentation.

"Most networks will automatically assign an IP address and other details to your computer when you connect to the network. These details can change periodically, but you might want to have a fixed IP address for the computer so you always know what its address is (for example, if it is a file server)."

I do have a fixed Full Stack Ipv4 address, set by my ISP. I do not know if that is enough to help the file server, or if having a fixed Ipv6 address would provide additional help.

I am not sure that it really is possible to have a fixed Ipv6 address, or even desirable, or that it will improve how the file server works, but do not like to feel that I cannot try it.

My lack of real technical knowledge is clear to me. I do understand that there are different addresses for my router's dealings with the internet, and the addresses for the network of my machines and the router. But I am not at all sure how to find the entries required in the Settings Network pages. So I thought I should ask the question.

Yours

Victor

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------- Original Message -------

On Tuesday, March 22nd, 2022 at 15:05, Manfred Hampl <email address hidden> wrote:

> Your question #701032 on ubuntu-docs in Ubuntu changed:
>
> https://answers.launchpad.net/ubuntu/+source/ubuntu-docs/+question/701032
>
> Manfred Hampl proposed the following answer:
>
> Why do you want to set a fixed IP address instead of DHCP?
>
> For the confusion between "netmask" and "prefix":
>
> In IPv4 the limits for directly reachable addresses are called "netmask", and its equivalent in IPv6 is called "prefix".
>
> "The second question is about finding out the data to enter in the
>
> following: ..."
>
> These data have to be defined by your network provider and depend on your local circumstances.
>
> You have to ask your provider.
>
> --
>
> If this answers your question, please go to the following page to let us
>
> know that it is solved:
>
> https://answers.launchpad.net/ubuntu/+source/ubuntu-docs/+question/701032/+confirm?answer_id=1
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