Re: Fedora 33 System-Wide Change proposal: systemd-resolved

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* Tom Hughes:

>        ·   Single-label names are routed to all local interfaces capable of IP
>            multicasting, using the LLMNR protocol. Lookups for IPv4 addresses
>            are only sent via LLMNR on IPv4, and lookups for IPv6 addresses are
>            only sent via LLMNR on IPv6. Lookups for the locally configured
>            host name and the "_gateway" host name are never routed to LLMNR.

>        Routing of lookups may be influenced by configuring per-interface
>        domain names and other settings. See systemd.network(5) and
>        resolvectl(1) for details. The following query routing logic applies
>        for unicast DNS traffic:
>
>        ·   If a name to look up matches (that is: is equal to or has as
>            suffix) any of the configured search or route-only domains of any
>            link (or the globally configured DNS settings), the "best matching"
>            search/route-only domain is determined: the matching one with the
>            most labels. The query is then sent to all DNS servers of any links
>            or the globally configured DNS servers associated with this "best
>            matching" search/route-only domain. (Note that more than one link
>            might have this same "best matching" search/route-only domain
>            configured, in which case the query is sent to all of them in
>            parallel).
>
>        ·   If a query does not match any configured search/route-only domain
>            (neither per-link nor global), it is sent to all DNS servers that
>            are configured on links with the "DNS default route" option set, as
>            well as the globally configured DNS server.
>
>        ·   If there is no link configured as "DNS default route" and no global
>            DNS server configured, the compiled-in fallback DNS server is used.
>
>        ·   Otherwise the query is failed as no suitable DNS servers could be
>            determined.

Thanks.  Does this mean that no search list processing happens, for
neither single-label names (per for the first paragraph), nor for
multi-label names (per the routing description)?  Or is this process
described in some other context?

Thanks,
Florian
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