On 2023-04-21 20:04, Carlos E. R. wrote:
I don't know how to use those ULA things, I need a howto for dummies somewhere.
And I have to find out if that thing interferes with Telefónica own setup. They reserve for themselves a portion of the IPv4 DHCP addresses, for instance.
Take a look on page 53 of the English manual. There's a checkbox for Enable ULA Prefix Advertisement. Enable that and Random Generate. That should generate a ULA prefix on your network, in addition to your global prefix. ULA is the IPv6 version of IPv4 RFC1918 addresses and will not interfere with anything your ISP provides. Since you have your own DNS, you can use it to point to the ULA for your devices. When you do that, do not use one of the temporary addresses. Use the consistent one, which is the only one that doesn't say temporary. Here's what ip -6 addr show displays for the consistent ULA on this computer: fd48:1a37:2160:0:76d4:fe5b:35ff:f5fa/64 scope global dynamic mngtmpaddr Find the address that's similar to this to use with the DNS. ULA addresses start with fc or fd. The prefix is determined by whatever appears with that random generation. It will not change until you change it.