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dnstap showing extra responses · Issue #369 · NLnetLabs/unbound · GitHub
klutchell/unbound-docker#437 
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klutchell/unbound-docker
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Description
I'm seeing extra responses in the dnstap stream from unbound 1.13.0. I'm not sure if this is unbound actually generating extra responses or the dnstap stream duplicating the responses. Here is an example (decoded using https://github.com/dnstap/golang-dnstap/tree/master/dnstap) that I extracted from my dnstap logs. Note the extra client response. The timestamps also look strange. The timestamp of the client response is before the timestamp of the forwarder response.
message:
type: CLIENT_QUERY
query_time: !!timestamp 2020-12-09 23:15:19.20792
socket_family: INET
socket_protocol: UDP
query_address: 192.168.1.221
query_port: 54582
query_message: |
;; opcode: QUERY, status: NOERROR, id: 2
;; flags: rd; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;pubsub.pubnub.com. IN A
---
type: MESSAGE
message:
type: CLIENT_RESPONSE
response_time: !!timestamp 2020-12-09 23:15:19.208216
socket_family: INET
socket_protocol: UDP
query_address: 192.168.1.221
query_port: 54582
response_message: |
;; opcode: QUERY, status: NOERROR, id: 2
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;pubsub.pubnub.com. IN A
;; ANSWER SECTION:
pubsub.pubnub.com. 18 IN A 54.241.191.232
pubsub.pubnub.com. 18 IN A 54.241.191.233
---
type: MESSAGE
message:
type: FORWARDER_QUERY
query_time: !!timestamp 2020-12-09 23:15:19.208601
socket_family: INET
socket_protocol: UDP
response_address: 1.1.1.1
response_port: 53
query_zone: "."
query_message: |
;; opcode: QUERY, status: NOERROR, id: 57949
;; flags: rd cd; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1
;; QUESTION SECTION:
;pubsub.pubnub.com. IN A
;; ADDITIONAL SECTION:
;; OPT PSEUDOSECTION:
; EDNS: version 0; flags: do; udp: 1472
---
type: MESSAGE
message:
type: CLIENT_RESPONSE
response_time: !!timestamp 2020-12-09 23:15:19.208623
socket_family: INET
socket_protocol: UDP
query_address: 192.168.1.221
query_port: 54582
response_message: |
;; opcode: QUERY, status: NOERROR, id: 2
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;pubsub.pubnub.com. IN A
;; ANSWER SECTION:
pubsub.pubnub.com. 18 IN A 54.241.191.232
pubsub.pubnub.com. 18 IN A 54.241.191.233
---
type: MESSAGE
message:
type: FORWARDER_RESPONSE
query_time: !!timestamp 2020-12-09 23:15:19.20788
response_time: !!timestamp 2020-12-09 23:15:19.228139
socket_family: INET
socket_protocol: UDP
response_address: 1.1.1.1
response_port: 53
query_zone: "."
response_message: |
;; opcode: QUERY, status: NOERROR, id: 57949
;; flags: qr rd ra cd; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1
;; QUESTION SECTION:
;pubsub.pubnub.com. IN A
;; ANSWER SECTION:
pubsub.pubnub.com. 93 IN A 54.241.191.232
pubsub.pubnub.com. 93 IN A 54.241.191.233
;; ADDITIONAL SECTION:
;; OPT PSEUDOSECTION:
; EDNS: version 0; flags: do; udp: 1232```
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