There's a known bug in NetworkManager (will attach the upstream bug report) that has not yet been backported to Fedora 20 and blocks dnssec-trigger-script from working reliably (bug #1112248).
For the record: This is fixed upstream by commit http://cgit.freedesktop.org/NetworkManager/NetworkManager/commit/?id=11f9855223966c4fd927fe83e2cd9a623a74acad Fedora rawhide is fixed since version NetworkManager-0.9.9.95-1.git20140609.fc21. Rhel-7 is fixes since NetworkManager-0.9.9.1-13.git20140326.4dba720.el7 Related BZ: https://bugzilla.gnome.org/show_bug.cgi?id=729284 https://bugzilla.redhat.com/show_bug.cgi?id=1091296 https://bugzilla.redhat.com/show_bug.cgi?id=1112248
NetworkManager-0.9.9.0-40.git20131003.fc20 has been submitted as an update for Fedora 20. https://admin.fedoraproject.org/updates/NetworkManager-0.9.9.0-40.git20131003.fc20
Package NetworkManager-0.9.9.0-40.git20131003.fc20: * should fix your issue, * was pushed to the Fedora 20 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing NetworkManager-0.9.9.0-40.git20131003.fc20' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2014-7764/NetworkManager-0.9.9.0-40.git20131003.fc20 then log in and leave karma (feedback).
NetworkManager-0.9.9.0-40.git20131003.fc20 has been pushed to the Fedora 20 stable repository. If problems still persist, please make note of it in this bug report.