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Also seeing similar issue with DNS over TLS. I had no System DNS servers set & was relying on Unbound to handle the resolution. (Adding a System DNS server remedied the issue for me for now)

Sample Unbound log:

Code Select Expand

2024-12-03T08:51:22-05:00 Notice unbound [57387:1] notice: ssl handshake failed 1.1.1.1 port 853
2024-12-03T08:51:22-05:00 Error unbound [57387:1] error: ssl handshake cert error: unable to get local issuer certificate
2024-12-03T08:51:22-05:00 Error unbound [57387:1] error: and additionally crypto error:0A000086:SSL routines::certificate verify failed
2024-12-03T08:51:22-05:00 Error unbound [57387:1] error: and additionally crypto error:80000002:system library::No such file or directory
2024-12-03T08:51:22-05:00 Error unbound [57387:1] error: and additionally crypto error:16000069:STORE routines::unregistered scheme
2024-12-03T08:51:22-05:00 Error unbound [57387:1] error: and additionally crypto error:80000002:system library::No such file or directory
2024-12-03T08:51:22-05:00 Error unbound [57387:1] error: and additionally crypto error:16000069:STORE routines::unregistered scheme
2024-12-03T08:51:22-05:00 Error unbound [57387:1] error: and additionally crypto error:80000002:system library::No such file or directory
2024-12-03T08:51:22-05:00 Error unbound [57387:1] error: ssl handshake failed crypto error:16000069:STORE routines::unregistered scheme

NTP was also unable to synchronize due to failed DNS lookups.