We should land a fix keeping the full string in
networkmanager.passthrough and additionaly work on a proper upstream
solution, as suggested by Danilo in comment #4, introducing new settings
as a longer term solution.
** Changed in: netplan
Status: New => Triaged
** Changed in: netplan
Importance: Undecided => High
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https://bugs.launchpad.net/bugs/2055148
Title:
NetworkManager connections with an explicit DoT (DNS over TLS) are not
supported with Netplan
Status in netplan:
Triaged
Status in netplan.io package in Ubuntu:
Confirmed
Status in network-manager package in Ubuntu:
Confirmed
Bug description:
From: https://discourse.ubuntu.com/t/blog-netplan-developer-
diaries/35932/11
Hi all,
NetworkManager connections with an explicit DoT (DNS over TLS)
configuration are not supported with Netplan, but NetworkManager does
feed back the DoT DNS info with server address and Server Name
Indication (SNI) in the form server_address#SNI, e.g.
1.2.3.4#dns.myhome.com as nameserver addresses to Netplan. As a
result, subsequent Netplan config applications fail because DNS
servers don’t have the expected dotted decimal (IPv4) or colon’ed hex
(IPv6) form.
```
nmcli> describe ipv4.dns
=== [dns] ===
[NM property description]
Array of IP addresses of DNS servers. For DoT (DNS over TLS), the SNI server
name can be specified by appending "#example.com" to the IP address of the DNS
server. This currently only has effect when using systemd-resolved.
```
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