DNSSEC-TRUST-ANCHORS.D(5) dnssec-trust-anchors.d DNSSEC-TRUST-ANCHORS.D(5) (NAME) dnssec-trust-anchors.d - DNSSEC (SYNOPSIS) /etc/dnssec-trust-anchors.d/*.positive /run/dnssec-trust-anchors.d/*.positive /usr/local/lib/dnssec-trust-anchors.d/*.positive /usr/lib/dnssec-trust-anchors.d/*.positive /etc/dnssec-trust-anchors.d/*.negative /run/dnssec-trust-anchors.d/*.negative /usr/local/lib/dnssec-trust-anchors.d/*.negative /usr/lib/dnssec-trust-anchors.d/*.negative (DESCRIPTION) DNSSEC systemd-resolved.service(8) DNSSEC . (POSITIVE TRUST ANCHORS) DNSKEY DS DNSSEC . DNSSEC RFC 4035 4.4[1] . .positive /etc/dnssec-trust-anchors.d/ /run/dnssec-trust-anchors.d/ /usr/lib/dnssec-trust-anchors.d/ . . /usr/lib/dnssec-trust-anchors.d/ /etc/dnssec-trust-anchors.d/ /run/dnssec-trust-anchors.d/ /dev/null (""). DNS RFC 1035 5[2] . DS DNSKEY . "#" ";" () . DS : . IN DS 19036 8 2 49aac11d7b6f6446702e54a1607371607a1a41855200fd2ce1cdde32f24e8fb5 "." . . "IN" "DS" . (key tag) (signature algorithm) (digest algorithm) . RFC 4034 5[3] . DNSKEY : . IN DNSKEY 257 3 8 AwEAAagAIKlVZrpC6Ia7gEzahOR+9W29euxhJhVVLOyQbSEW0O8gcCjFFVQUTf6v58fLjwBd0YI0EzrAcQqBGCzh/RStIoO8g0NfnfL2MTJRkxoXbfDaUeVPQuYEhg37NZWAJQ9VnMVDxP/VHL496M/QZxkjf5/Efucp2gaDX6RS6CXpoY68LsvPVjR0ZSwzz1apAzvN9dlzEheX7ICJBBtuA6G3LQpzW5hOA2hzCTMjJPJ8LbqF6dsV6DoBQzgul0sGIcGOYl7OyQdXfZ57relSQageu+ipAdTTJ25AsRTAoub8ONGcLmqrAmRLKBP1dfwhYB4N7knNnulqQxA+Uk1ihz0= "IN" "DNSKEY" . DNSKEY Base64 . RFC 4034 2[4] . DS DNSKEY ( ) DNSSEC . systemd-resolved . . . DNSKEY DS . DS (revoked) . RFC 5011[5] . systemd-resolved DNS . . DNSSEC IANA Trust Anchor and Keys[6] . (NEGATIVE TRUST ANCHORS) DNSSEC . . .negative . ";" . DNS . : # Reverse IPv4 mappings 10.in-addr.arpa 16.172.in-addr.arpa 168.192.in-addr.arpa ... # Some custom domains prod stag DNS DNS . RFC 7646[7] . DNS . DNSSECNegativeTrustAnchors= systemd.network(5) . (SEE ALSO) systemd(1), systemd-resolved.service(8), resolved.conf(5), systemd.network(5) (NOTES) 1. RFC 4035, Section 4.4 https://tools.ietf.org/html/rfc4035#section-4.4 2. RFC 1035, Section 5 https://tools.ietf.org/html/rfc1035#section-5 3. RFC 4034, Section 5 https://tools.ietf.org/html/rfc4034#section-5 4. RFC 4034, Section 2 https://tools.ietf.org/html/rfc4034#section-2 5. RFC 5011 https://tools.ietf.org/html/rfc5011 6. IANA Trust Anchor and Keys https://data.iana.org/root-anchors/root-anchors.xml 7. RFC 7646 https://tools.ietf.org/html/rfc7646 systemd 261.2 DNSSEC-TRUST-ANCHORS.D(5)