I'm thinking about setting up a pair of Rasp-Pi-4 as DNS servers with
4GB of ram. Is that enough ram for a DNS server?
https://www.amazon.com/CanaKit-Raspberry-4GB-Starter-MAX/dp/B07XPHWPRB
https://wiki.gentoo.org/wiki/Embedded_systems/ARM_hardware_list
If 4GB is not enough, there are some boards with 8GB
of ram.
What about running postfix on a third board?
https://samhobbs.co.uk/2013/12/raspberry-pi-email-server-part-1-postfix
All feedback is encouraged. It will not be a high volume postfix email
system. As far as the DNS servers, it seems I vaguely remember some
software or filters to prevent hack attacks, that just overwhelm DNS
servers; or something like that. It just lowers the data flow rate.
It seems this is popular, and which version of USB 3.?
to use on a stick, as now usb sticks can have large capacities now (T+).
Surely I'll back up the mail (spool & such) to a secondary hard drive on
another system.
It this all goes well, surely I put a web server on a fourth board.
https://pimylifeup.com/raspberry-pi-nginx/
Granted those links are not centric to embedded gentoo, but they do
cover a lot of what is needed.
Further suggestions are most welcome. This is a fun to do project,
useful as it would basically be easy to duplicate, so I can travel
anywhere, get a few static IPs and deploy a small business,
self-sufficient, network.
So the Rpi4 boards will all need their own unique, static Ip. But,
another questions is while they are running as 4 distinct gentoo
servers, could they also double as a quad-gentoo cluster?
https://www.picocluster.com/collections/raspberry-pi4
Security pointers are most welcome too.
The eventual idea is to have a fixed home network, but
be able to travel around in my pickup/cabovercamper
and have what I need right there, or provide it to friends as a ready to
go small network. Embedded Gentoo,
low-power hardware and 100% (gentoo) source driven).
The S20 (520G ram) phone would server as the router.
(2) 5G cell phones running on (2) different 5G service
vendor, could make the services and cluster multi-homed?
Would all of this work with just IP6 and a fancy cell phone, running
gentoo? We shall see.
James
