我有一个在 LAN 上运行的前向 BIND9 服务器，它每天记录数百个错误，例如：
Aug 29 18:38:29 nuc named[850]: error (no valid RRSIG) resolving 'ubuntu.com/DS/IN': 75.75.75.75#53
Aug 29 18:38:31 nuc named[850]: validating @0x7fc6d826ed50: com SOA: got insecure response; parent indicates it should be secure
Aug 29 18:38:31 nuc named[850]: error (no valid RRSIG) resolving 'medium.com/DS/IN': 75.75.75.75#53
Aug 29 18:38:31 nuc named[850]: validating @0x7fc6d4014b80: com SOA: got insecure response; parent indicates it should be secure
客户端似乎仍在获得结果，但这些消息正在填满日志。中的相关行named.conf：
forwarders {
# Comcast
2001:558:feed::1;
2001:558:feed::2;
75.75.75.75;
75.75.76.76;
};
forward only;
dnssec-enable …