I'm on Ubuntu 22.04 LTS. I always need to provide the interface specification when using link-local IPv6-addresses, e.g. a simple 'ping fe80::2a0:57ff:fe24' doesn't work but 'ping fe80::2a0:57ff:fe24%2' does the trick. I couldn't figure out why this is required on my desktop Ubuntu system. In contrary on a Debian bullseye server the IPv6-addresss without the interface specifier is sufficient. Any idea?
However, since it is required on my Ubuntu system the systemd-resolved stub doesn't work and I have to employ the workaround mentioned in my initial post. The '/run/systemd/resolve/resolv.conf' file contains the proper link-local IPv6-address of my name server including the interface specifier. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to systemd in Ubuntu. https://bugs.launchpad.net/bugs/2003778 Title: systemd-resolved uses malformed link-local IPv6 forwarder Status in systemd package in Ubuntu: Incomplete 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 -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
