I am trying to make Unbound act as a recursive resolver that answers with and caches secure and insecure data, but not bogus data, using the IANA ITAR trust anchors. In particular, I want replies with the AD bit clear to mean that the relevant data are insecure, and I want the resolver to return an error when all it can find is bogus data. However, my attempts so far have been met with failure, so I assume I must be doing something wrong, and I should like to know how to do it right. I installed Unbound 1.4.2 (on a 32-bit machine not running Mac OS X or Solaris, so I haven't upgraded to 1.4.3) and ran it with the following configuration: server: verbosity: 1 interface: 0.0.0.0 interface: ::0 do-daemonize: no access-control: 0.0.0.0/0 allow access-control: ::0/0 allow chroot: "/var/chroot/unbound" directory: "" logfile: "" use-syslog: no log-time-ascii: yes pidfile: "/var/run/unbound.pid" root-hints: "named.cache" do-not-query-address: 127.0.0.1/8 do-not-query-localhost: yes trust-anchor-file: "anchors.mf" val-log-level: 1 named.cache is from <ftp://ftp.internic.net/domain/named.cache>, as of 2010-03-10. anchors.mf is from <https://itar.iana.org/anchors/anchors.mf>, as of 2010-03-01. Both files are in /var/chroot/unbound. unbound-checkconf is happy with my configuration file. When I query Unbound for badsign-a.test.dnssec-tools.org's A record, it happily hands back an A record, even though the authoritative nameserver gives a bad signature: % dig @localhost. badsign-A.test.dnssec-tools.org. a ... ;; ANSWER SECTION: badsign-A.test.dnssec-tools.org. 86400 IN A 126.96.36.199 ... % drill @localhost. badsign-A.test.dnssec-tools.org. a ... ;; ANSWER SECTION: badsign-A.test.dnssec-tools.org. 86386 IN A 188.8.131.52 ... I want Unbound to give an error in this case, not simply an answer with the AD bit clear. If I replace trust-anchor-file: "anchors.mf" by dlv-anchor-file: "dlv.isc.org.key" then I get back SERVFAIL as I expected. dlv.isc.org.key is from <http://ftp.isc.org/www/dlv/dlv.isc.org.key>, as of 2010-03-10, and is also stored in /var/chroot/unbound. Let me know if you would like to see log messages, or any other information about my configuration or tests.