On 2019-01-11 11:01 p.m., J Doe wrote: > Hello, > > I currently run a server using Ubuntu 18.04.1 LTS with patches current to > today (Jan 11, 2019). I configured systemd-resolved to use DNSSEC validation > by editing: /etc/systemd/resolved.conf and setting: DNSSEC=yes. > > When I check my syslog, I note that systemd-resolved is logging that the > positive trust anchor for the root has been revoked: > > Jan 11 17:59:48 server systemd-resolved[728]: DNSSEC Trust anchor . IN DS > 19036 8 2 49aac11d7b6f6446702e54a1607371607a1a41855200fd2ce1cdde32f24e8fb5 > has been revoked. Please update the trust anchor, or upgrade your operating > system. > > I checked: man dnssec-trust-anchors.d and read: > > "Note that systemd-resolved will automatically use a built-in trust anchor > key for the Internet root domain if no positive trust anchors are defined for > the root domain.” > > I verified that: /etc/dnssec-trust-anchors.d/*.positive, > /run/dnssec-trust-anchors.d/*.positive, > /usr/lib/dnssec-trust-anchors.d/*.positive do *NOT* exist, which means that > only the compiled in root trust anchor key is being used and that > systemd-resolved has found that it has been revoked. > > Does this require a new root trust anchor to be compiled in and then shipped > in a systemd update or should I manually acquire the root trust anchor and > place it in one of the directories mentioned in: man dnssec-trust-anchors.d ? > > For the meantime, I have disabled DNSSEC validation in: > /etc/systemd/resolved.conf > > Thanks, > > - J >
It looks like resolved in 18.04 does in fact contain both the old and new trusty anchors hardcoded in resolved-dns-trusty-anchor.c. A quick look at the file suggests the expired one then gets removed from the list and the warning is issued. Do you only get the warning once? Marc. -- ubuntu-server mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-server More info: https://wiki.ubuntu.com/ServerTeam
