Re: This is bad, was Re: Fedora 33 System-Wide Change proposal: systemd-resolved

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On Mon, Sep 28, 2020 at 4:32 pm, Marius Schwarz <fedoradev@xxxxxxxxxxxx> wrote:
as one who had split horizone dns setups, it's not the client who
splits, it's the server.

It's really the client... or the server running on the client:

nss-dns (traditional): split DNS impossible. No way to ever split DNS.
dnsmasq, systemd-resolved: split DNS is possible

Yes, dnsmasq and systemd-resolved are local DNS servers, but point is, they split your DNS so that requests for different networks are ultimately sent to the DNS server configured for that network. With nss-dns, that is impossible: all your requests go to one server and that's that. See [1] for an example of how this would work in practice.

[1] https://fedoraproject.org/wiki/Changes/systemd-resolved#Split_DNS

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