Public bug reported:
In a network with a local nameserver that has IPv4-address 10.1.0.1 and
link-local IPv6-address fe80::2a0:57ff:fe24:b041%2 'resolvectl' returns:
Global
Protocols: -LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported
resolv.conf mode: uplink
Link 2 (ens33)
Current Scopes: DNS
Protocols: +DefaultRoute +LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported
Current DNS Server: fe80::2a0:57ff:fe24:b041
DNS Servers: 10.1.0.1 fe80::2a0:57ff:fe24:b041%21905
DNS Domain: < edited >
Name resolution fails because the indicated 'Current DNS Server'
IPv6-address is an incomplete link-local address. Also the link-local
IPv6-address indicated in the second position of the 'DNS Servers' line
is malformed. Issuing consecutive 'resolvectl' calls have the last 4
digits in this line changing, i.e. they all show
'fe80::2a0:57ff:fe24:b041%2', which would be the correct link-local
IPv6-address including the interface specification, but then 4 digits
that are not constant.
Workaround:
Take systemd-resoved out of stub-mode with:
(cd /etc && sudo rm -f resolv.conf && sudo ln -s
/run/systemd/resolve/resolv.conf resolv.conf)
The auto generate file '/run/systemd/resolve/resolv.conf' has the proper
specification of the name servers link-local IPv6-address:
nameserver 10.1.0.1
nameserver fe80::2a0:57ff:fe24:b041%2
search < edited >
The broken stub mode is configured with:
(cd /etc && rm -f resolv.conf && ln -s /run/systemd/resolve/stub-
resolv.conf resolv.conf)
** Affects: systemd (Ubuntu)
Importance: Undecided
Status: New
** Summary changed:
- systemd-resoled uses malformed link-local IPv6 forwarder
+ systemd-resolved uses malformed link-local IPv6 forwarder
** Description changed:
In a network with a local nameserver that has IPv4-address 10.1.0.1 and
link-local IPv6-address fe80::2a0:57ff:fe24:b041%2 'resolvectl' returns:
Global
- Protocols: -LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported
+ Protocols: -LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported
resolv.conf mode: uplink
Link 2 (ens33)
- Current Scopes: DNS
- Protocols: +DefaultRoute +LLMNR -mDNS -DNSOverTLS
DNSSEC=no/unsupported
+ Current Scopes: DNS
+ Protocols: +DefaultRoute +LLMNR -mDNS -DNSOverTLS
DNSSEC=no/unsupported
Current DNS Server: fe80::2a0:57ff:fe24:b041
- DNS Servers: 10.1.0.1 fe80::2a0:57ff:fe24:b041%21905
- DNS Domain: < edited >
+ DNS Servers: 10.1.0.1 fe80::2a0:57ff:fe24:b041%21905
+ DNS Domain: < edited >
- Name resolution fails because the indicated name server IPv6-address is
- an incomplete link-local address. Also the link-local IPv6-address
- indicated in the second position of the 'DNS Servers' line is malformed.
- Issuing consecutive 'resolvectl' calls have the last 4 digits in this
- line changing, i.e. they all show 'fe80::2a0:57ff:fe24:b041%2', which
- would be the correct link-local IPv6-address including the interface
- specification, but then 4 digits that are not constant.
+ Name resolution fails because the indicated 'Current DNS Server'
+ IPv6-address is an incomplete link-local address. Also the link-local
+ IPv6-address indicated in the second position of the 'DNS Servers' line
+ is malformed. Issuing consecutive 'resolvectl' calls have the last 4
+ digits in this line changing, i.e. they all show
+ 'fe80::2a0:57ff:fe24:b041%2', which would be the correct link-local
+ IPv6-address including the interface specification, but then 4 digits
+ that are not constant.
Workaround:
Take systemd-resoved out of stub-mode with:
(cd /etc && sudo rm -f resolv.conf && sudo ln -s
/run/systemd/resolve/resolv.conf resolv.conf)
The auto generate file '/run/systemd/resolve/resolv.conf' has the proper
specification of the name servers link-local IPv6-address:
nameserver 10.1.0.1
nameserver fe80::2a0:57ff:fe24:b041%2
search < edited >
-
The broken stub mode is configured with:
(cd /etc && rm -f resolv.conf && ln -s /run/systemd/resolve/stub-
resolv.conf resolv.conf)
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https://bugs.launchpad.net/bugs/2003778
Title:
systemd-resolved uses malformed link-local IPv6 forwarder
Status in systemd package in Ubuntu:
New
Bug description:
In a network with a local nameserver that has IPv4-address 10.1.0.1
and link-local IPv6-address fe80::2a0:57ff:fe24:b041%2 'resolvectl'
returns:
Global
Protocols: -LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported
resolv.conf mode: uplink
Link 2 (ens33)
Current Scopes: DNS
Protocols: +DefaultRoute +LLMNR -mDNS -DNSOverTLS
DNSSEC=no/unsupported
Current DNS Server: fe80::2a0:57ff:fe24:b041
DNS Servers: 10.1.0.1 fe80::2a0:57ff:fe24:b041%21905
DNS Domain: < edited >
Name resolution fails because the indicated 'Current DNS Server'
IPv6-address is an incomplete link-local address. Also the link-local
IPv6-address indicated in the second position of the 'DNS Servers'
line is malformed. Issuing consecutive 'resolvectl' calls have the
last 4 digits in this line changing, i.e. they all show
'fe80::2a0:57ff:fe24:b041%2', which would be the correct link-local
IPv6-address including the interface specification, but then 4 digits
that are not constant.
Workaround:
Take systemd-resoved out of stub-mode with:
(cd /etc && sudo rm -f resolv.conf && sudo ln -s
/run/systemd/resolve/resolv.conf resolv.conf)
The auto generate file '/run/systemd/resolve/resolv.conf' has the
proper specification of the name servers link-local IPv6-address:
nameserver 10.1.0.1
nameserver fe80::2a0:57ff:fe24:b041%2
search < edited >
The broken stub mode is configured with:
(cd /etc && rm -f resolv.conf && ln -s /run/systemd/resolve/stub-
resolv.conf resolv.conf)
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/2003778/+subscriptions
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