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Re: sharing a network connection from debian to non-debian

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On 2021-01-15 21:02, Dan Hitt wrote:
> In 2016, i had a computer with mint on it (which is a form of ubuntu), and
> it was connected to an internet modem.  There was a super simple gui on it
> that i could use to share that connection with some older hardware that
> were not directly connected to the internet modem.  (They were not
> connected to the internet modem because for whatever reason, directly
> connecting them made them very unstable and prone to crash.)  But,
> nevertheless, the old hardware could use the mint box with no configuration
> on my part, and get out to the internet through it.
> 
> Now, as it happens, i'm planning on upgrading that mint box to debian.
> 
> In preparation for that, i'm trying to share the internet with them using
> another box, which has debian on it, and which is connected to the internet
> modem.  The debian box has some address like 192.168.*.* on the internet
> modem network, and an address like 10.*.*.* connected to the old hardware,
> and the two networks have no direct connection, they just both hook up to
> my debian machine (one on the motherboard's ethernet, and one on a
> usb/ethernet device).
> 
> For the old hardware, i can specify the address, a gateway, and a host for
> dns (all done by ip).  I would choose the ip of the debian box for both the
> gateway and the dns, and i'd take the ip address of the old hardware to
> just be something unused (no need to run dhcpd on the debian box, i think).
> 
> So i just need to know what to do on the debian box so that it can field
> requests to get ips from host names on the internet, and forward packets to
> the internet modem.  Hopefully, it will be some simple tool like
> nm-connection-editor, but maybe it has to be a series of commands.  If it
> is a series of commands, what are they?
> 
> TIA for any info!

I set up a personal computer (PC) as a firewall/ router using a 
general-purpose FOSS OS distribution (Red Hat Linux?) many years ago. 
It was a lot a work, but I learned a lot about networking and Linux.  If 
you choose this path, you will need to learn "netfilter":

https://www.debian.org/doc/manuals/debian-reference/ch05.en.html#_netfilter_infrastructure


Some years later, purpose-built firewall/ router FOSS distributions with 
WWW control panels became available.  These were easier to configure and 
manage than a general-purpose OS, and more secure.  IP Cop was my favorite:

http://www.ipcop.org/


But an old PC running 24x7 is bulky, requires a keyboard and monitor, 
consumes electricity, makes noise, and generates heat.  I wanted a 
small, silent, low-power box with a WWW control panel.  I tried various 
consumer firewall/ router/ WiFi/ switch appliances, and FOSS firmware 
for some, but they were all lacking and I bricked at least one device.


After more searching, I found UniFi:

https://www.ui.com/unifi-routing/usg/

https://www.ui.com/unifi/unifi-ap-ac-lite/


The killer feature is the UniFi Controller server software, which is 
available as a Debian package (I run it on a Debian VPS in the cloud). 
Using the WWW interface, you assemble individual devices into networks 
and use the controller to manage everything in a coordinated fashion:

https://help.ui.com/hc/en-us/articles/220066768-UniFi-How-to-Install-Update-via-APT-on-Debian-or-Ubuntu


David

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sharing a network connection from debian to non-debian Dan Hitt <dan.hitt@gmail.com> - 2021-01-16 06:10 +0100
  Re: sharing a network connection from debian to non-debian john doe <johndoe65534@mail.com> - 2021-01-16 07:30 +0100
    Re: sharing a network connection from debian to non-debian Doug McGarrett <dmcgarrett@optonline.net> - 2021-01-16 07:50 +0100
  Re: sharing a network connection from debian to non-debian Andrei POPESCU <andreimpopescu@gmail.com> - 2021-01-16 09:00 +0100
    Re: sharing a network connection from debian to non-debian Dan Hitt <dan.hitt@gmail.com> - 2021-01-16 19:30 +0100
      Re: sharing a network connection from debian to non-debian rhkramer@gmail.com - 2021-01-16 20:50 +0100
      Re: sharing a network connection from debian to non-debian Andrei POPESCU <andreimpopescu@gmail.com> - 2021-01-17 08:30 +0100
        Re: sharing a network connection from debian to non-debian john doe <johndoe65534@mail.com> - 2021-01-17 10:30 +0100
        Re: sharing a network connection from debian to non-debian Celejar <celejar@gmail.com> - 2021-01-17 16:00 +0100
      Re: sharing a network connection from debian to non-debian David Christensen <dpchrist@holgerdanske.com> - 2021-01-18 08:50 +0100
        Re: sharing a network connection from debian to non-debian Dan Hitt <dan.hitt@gmail.com> - 2021-01-19 01:50 +0100
          Re: sharing a network connection from debian to non-debian john doe <johndoe65534@mail.com> - 2021-01-19 07:10 +0100
          Re: sharing a network connection from debian to non-debian David Christensen <dpchrist@holgerdanske.com> - 2021-01-19 20:50 +0100
      Re: sharing a network connection from debian to non-debian Andrei POPESCU <andreimpopescu@gmail.com> - 2021-01-24 18:20 +0100
        Re: sharing a network connection from debian to non-debian Dan Hitt <dan.hitt@gmail.com> - 2021-01-24 23:10 +0100
          Re: sharing a network connection from debian to non-debian Dan Hitt <dan.hitt@gmail.com> - 2021-01-25 04:00 +0100
            Re: sharing a network connection from debian to non-debian Andrei POPESCU <andreimpopescu@gmail.com> - 2021-01-25 07:20 +0100
              Re: sharing a network connection from debian to non-debian Andrei POPESCU <andreimpopescu@gmail.com> - 2021-01-25 07:20 +0100
          Re: sharing a network connection from debian to non-debian Andrei POPESCU <andreimpopescu@gmail.com> - 2021-01-25 07:10 +0100
            Re: sharing a network connection from debian to non-debian Joe <joe@jretrading.com> - 2021-01-25 10:40 +0100
              Re: sharing a network connection from debian to non-debian Andrei POPESCU <andreimpopescu@gmail.com> - 2021-01-25 20:10 +0100
            Re: sharing a network connection from debian to non-debian Dan Hitt <dan.hitt@gmail.com> - 2021-01-26 03:50 +0100
  Re: sharing a network connection from debian to non-debian David Christensen <dpchrist@holgerdanske.com> - 2021-01-16 11:10 +0100
    Re: sharing a network connection from debian to non-debian rhkramer@gmail.com - 2021-01-16 15:30 +0100
  Re: sharing a network connection from debian to non-debian Michael Howard <mike@dewberryfields.co.uk> - 2021-01-16 16:00 +0100
  Re: sharing a network connection from debian to non-debian elvis <elvis@dogonfire.com> - 2021-01-19 09:20 +0100

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