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Record type SVCB undefined.. #114

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opened 2026-04-17 02:12:42 +08:00 by bcookatpcsd · 1 comment
bcookatpcsd commented 2026-04-17 02:12:42 +08:00 (Migrated from github.com)
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/tmp/numa/current:2026-04-16_17:55:14.19838 [2026-04-16T17:55:14.198Z INFO  numa::ctx] 10.120.16.168:57776 | UNKNOWN(64) _dns.resolver.arpa | LOCAL | NXDOMAIN | 0ms

/tmp/numa/current:2026-04-16_17:55:40.11376 [2026-04-16T17:55:40.113Z INFO  numa::ctx] 10.120.0.110:61616 | UNKNOWN(64) _dns.resolver.arpa | LOCAL | NXDOMAIN | 0ms

/tmp/numa/current:2026-04-16_17:56:21.45158 [2026-04-16T17:56:21.451Z INFO  numa::ctx] 10.120.48.115:56463 | UNKNOWN(64) _dns.resolver.arpa | LOCAL | NXDOMAIN | 0ms

(more sauce)
RFC 9462:
4. Discovery Using Resolver IP Addresses

When a DNS client is configured with an Unencrypted DNS Resolver IP address, it SHOULD query the resolver for SVCB records of a service with a scheme of "dns" and an authority of "resolver.arpa" before making other queries. This allows the client to switch to using encrypted DNS for all other queries, if possible. Specifically, the client issues a query for _dns.resolver.arpa. with the SVCB resource record type (64) [RFC9460].

(wikipedia page of dns record types.. )
https://en.wikipedia.org/wiki/List_of_DNS_record_types

``` /tmp/numa/current:2026-04-16_17:55:14.19838 [2026-04-16T17:55:14.198Z INFO numa::ctx] 10.120.16.168:57776 | UNKNOWN(64) _dns.resolver.arpa | LOCAL | NXDOMAIN | 0ms /tmp/numa/current:2026-04-16_17:55:40.11376 [2026-04-16T17:55:40.113Z INFO numa::ctx] 10.120.0.110:61616 | UNKNOWN(64) _dns.resolver.arpa | LOCAL | NXDOMAIN | 0ms /tmp/numa/current:2026-04-16_17:56:21.45158 [2026-04-16T17:56:21.451Z INFO numa::ctx] 10.120.48.115:56463 | UNKNOWN(64) _dns.resolver.arpa | LOCAL | NXDOMAIN | 0ms ``` (more sauce) RFC 9462: [4. ](https://www.rfc-editor.org/rfc/rfc9462.html#section-4)[Discovery Using Resolver IP Addresses](https://www.rfc-editor.org/rfc/rfc9462.html#name-discovery-using-resolver-ip) When a DNS client is configured with an Unencrypted DNS Resolver IP address, it SHOULD query the resolver for SVCB records of a service with a scheme of "dns" and an authority of "resolver.arpa" before making other queries. This allows the client to switch to using encrypted DNS for all other queries, if possible. Specifically, the client issues a query for _dns.resolver.arpa. with the SVCB resource record type (64) [[RFC9460](https://www.rfc-editor.org/rfc/rfc9462.html#RFC9460)]. (wikipedia page of dns record types.. ) https://en.wikipedia.org/wiki/List_of_DNS_record_types
bcookatpcsd commented 2026-04-17 02:21:50 +08:00 (Migrated from github.com)
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found a few more..

❯ grep UNKNOWN /tmp/numa/* | awk '{print $7}' | sort -u
UNKNOWN(29)
UNKNOWN(35)
UNKNOWN(64)

found a few more.. ❯ grep UNKNOWN /tmp/numa/* | awk '{print $7}' | sort -u UNKNOWN(29) UNKNOWN(35) UNKNOWN(64)
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Reference: dearsky/numa#114
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