@diekuh thanks for reply!
I’m not claiming that mailcow changed my network configuration. Like I said. It’s not even update. It’s fresh install.
But problem is I’m pulling my hair out resolving this issue. And if I turn to docker community they won’t know structure of whole package as you do (I guess).
So I did some more “debugging”…
I started unbound with verbosity 3. And this is what I get in unbound log:
unbound-mailcow_1 | Receiving root hints...
######################################################################## 100.0%
unbound-mailcow_1 | setup in directory /etc/unbound
unbound-mailcow_1 | unbound_server.key exists
unbound-mailcow_1 | unbound_control.key exists
unbound-mailcow_1 | create unbound_server.pem (self signed certificate)
unbound-mailcow_1 | create unbound_control.pem (signed client certificate)
unbound-mailcow_1 | Signature ok
unbound-mailcow_1 | subject=CN = unbound-control
unbound-mailcow_1 | Getting CA Private Key
unbound-mailcow_1 | Setup success. Certificates created. Enable in unbound.conf file to use
unbound-mailcow_1 | [1609404806] unbound[1:0] debug: chdir to /etc/unbound
unbound-mailcow_1 | [1609404806] unbound[1:0] debug: drop user privileges, run as unbound
unbound-mailcow_1 | [1609404806] unbound[1:0] debug: switching log to /dev/console
unbound-mailcow_1 | [1609404806] unbound[1:0] debug: module config: "validator iterator"
unbound-mailcow_1 | [1609404806] unbound[1:0] notice: init module 0: validator
unbound-mailcow_1 | [1609404806] unbound[1:0] notice: init module 1: iterator
unbound-mailcow_1 | [1609404806] unbound[1:0] debug: target fetch policy for level 0 is 3
unbound-mailcow_1 | [1609404806] unbound[1:0] debug: target fetch policy for level 1 is 2
unbound-mailcow_1 | [1609404806] unbound[1:0] debug: target fetch policy for level 2 is 1
unbound-mailcow_1 | [1609404806] unbound[1:0] debug: target fetch policy for level 3 is 0
unbound-mailcow_1 | [1609404806] unbound[1:0] debug: target fetch policy for level 4 is 0
unbound-mailcow_1 | [1609404806] unbound[1:0] debug: Reading root hints from /etc/unbound/root.hints
unbound-mailcow_1 | [1609404806] unbound[1:0] info: DelegationPoint<.>: 13 names (0 missing), 26 addrs (0 result, 26 avail) parentNS
unbound-mailcow_1 | [1609404806] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=7808 val=66352
unbound-mailcow_1 | [1609404806] unbound[1:0] info: start of service (unbound 1.9.6).
unbound-mailcow_1 | [1609404806] unbound[1:0] debug: validator[module 0] operate: extstate:module_state_initial event:module_event_new
unbound-mailcow_1 | [1609404806] unbound[1:0] info: validator operate: query . DNSKEY IN
unbound-mailcow_1 | [1609404806] unbound[1:0] debug: iterator[module 1] operate: extstate:module_state_initial event:module_event_pass
unbound-mailcow_1 | [1609404806] unbound[1:0] info: resolving . DNSKEY IN
unbound-mailcow_1 | [1609404806] unbound[1:0] info: priming . IN NS
unbound-mailcow_1 | [1609404806] unbound[1:0] debug: iterator[module 1] operate: extstate:module_state_initial event:module_event_pass
unbound-mailcow_1 | [1609404806] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609404806] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609404806] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609404806] unbound[1:0] debug: sending to target: <.> 192.203.230.10#53
unbound-mailcow_1 | [1609404806] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609404806] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609404806] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609404806] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609404806] unbound[1:0] debug: sending to target: <.> 199.9.14.201#53
unbound-mailcow_1 | [1609404806] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=8402 val=66352
unbound-mailcow_1 | [1609404807] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609404807] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609404807] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609404807] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609404807] unbound[1:0] debug: sending to target: <.> 193.0.14.129#53
unbound-mailcow_1 | [1609404807] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=8699 val=66352
unbound-mailcow_1 | [1609404808] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609404808] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609404808] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609404808] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609404808] unbound[1:0] debug: sending to target: <.> 199.9.14.201#53
unbound-mailcow_1 | [1609404808] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=8699 val=66352
unbound-mailcow_1 | [1609404809] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609404809] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609404809] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609404809] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609404809] unbound[1:0] debug: sending to target: <.> 198.41.0.4#53
unbound-mailcow_1 | [1609404809] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=8996 val=66352
unbound-mailcow_1 | [1609404810] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609404810] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609404810] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609404810] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609404810] unbound[1:0] debug: sending to target: <.> 198.97.190.53#53
unbound-mailcow_1 | [1609404810] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=9293 val=66352
unbound-mailcow_1 | [1609404811] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609404811] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609404811] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609404811] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609404811] unbound[1:0] debug: sending to target: <.> 198.41.0.4#53
unbound-mailcow_1 | [1609404811] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=9293 val=66352
unbound-mailcow_1 | [1609404812] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609404812] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609404812] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609404812] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609404812] unbound[1:0] debug: sending to target: <.> 192.203.230.10#53
unbound-mailcow_1 | [1609404812] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=9293 val=66352
unbound-mailcow_1 | [1609404814] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609404814] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609404814] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609404814] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609404814] unbound[1:0] debug: sending to target: <.> 192.33.4.12#53
unbound-mailcow_1 | [1609404814] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=9590 val=66352
unbound-mailcow_1 | [1609404815] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609404815] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609404815] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609404815] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609404815] unbound[1:0] debug: sending to target: <.> 198.97.190.53#53
unbound-mailcow_1 | [1609404815] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=9590 val=66352
unbound-mailcow_1 | [1609404816] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609404816] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609404816] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609404816] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609404816] unbound[1:0] debug: sending to target: <.> 192.58.128.30#53
unbound-mailcow_1 | [1609404816] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=9887 val=66352
unbound-mailcow_1 | [1609404817] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609404817] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609404817] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609404817] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609404817] unbound[1:0] debug: sending to target: <.> 192.5.5.241#53
unbound-mailcow_1 | [1609404817] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=10184 val=66352
unbound-mailcow_1 | [1609404818] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609404818] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609404818] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609404818] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609404818] unbound[1:0] debug: sending to target: <.> 192.36.148.17#53
unbound-mailcow_1 | [1609404818] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=10481 val=66352
unbound-mailcow_1 | [1609404819] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609404819] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609404819] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609404819] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609404819] unbound[1:0] debug: sending to target: <.> 192.58.128.30#53
unbound-mailcow_1 | [1609404819] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=10481 val=66352
unbound-mailcow_1 | [1609404820] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609404820] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609404820] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609404820] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609404820] unbound[1:0] debug: sending to target: <.> 199.7.91.13#53
unbound-mailcow_1 | [1609404820] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=10778 val=66352
unbound-mailcow_1 | [1609404821] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609404821] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609404821] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609404821] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609404821] unbound[1:0] debug: sending to target: <.> 199.7.83.42#53
unbound-mailcow_1 | [1609404821] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11075 val=66352
unbound-mailcow_1 | [1609404822] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609404822] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609404822] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609404822] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609404822] unbound[1:0] debug: sending to target: <.> 192.112.36.4#53
unbound-mailcow_1 | [1609404822] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11372 val=66352
unbound-mailcow_1 | [1609404822] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609404822] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609404822] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609404822] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609404822] unbound[1:0] debug: sending to target: <.> 202.12.27.33#53
unbound-mailcow_1 | [1609404822] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609404823] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609404823] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609404823] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609404823] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609404823] unbound[1:0] debug: sending to target: <.> 192.33.4.12#53
unbound-mailcow_1 | [1609404823] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609404825] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609404825] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609404825] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609404825] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609404825] unbound[1:0] debug: sending to target: <.> 202.12.27.33#53
unbound-mailcow_1 | [1609404825] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609404826] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609404826] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609404826] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609404826] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609404826] unbound[1:0] debug: sending to target: <.> 193.0.14.129#53
unbound-mailcow_1 | [1609404826] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609404828] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609404828] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609404828] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609404828] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609404828] unbound[1:0] debug: sending to target: <.> 199.7.91.13#53
unbound-mailcow_1 | [1609404828] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609404829] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609404829] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609404829] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609404829] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609404829] unbound[1:0] debug: sending to target: <.> 192.112.36.4#53
unbound-mailcow_1 | [1609404829] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609404831] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609404831] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609404831] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609404831] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609404831] unbound[1:0] debug: sending to target: <.> 192.36.148.17#53
unbound-mailcow_1 | [1609404831] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609404832] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609404832] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609404832] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609404832] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609404832] unbound[1:0] debug: sending to target: <.> 192.5.5.241#53
unbound-mailcow_1 | [1609404832] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609404834] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609404834] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609404834] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609404834] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609404834] unbound[1:0] debug: sending to target: <.> 199.7.83.42#53
unbound-mailcow_1 | [1609404834] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609404835] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609404835] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609404835] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609404835] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609404835] unbound[1:0] debug: sending to target: <.> 192.36.148.17#53
unbound-mailcow_1 | [1609404835] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609404838] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609404838] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609404838] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609404838] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609404838] unbound[1:0] debug: sending to target: <.> 192.33.4.12#53
unbound-mailcow_1 | [1609404838] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609404841] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609404841] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609404841] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609404841] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609404841] unbound[1:0] debug: sending to target: <.> 202.12.27.33#53
unbound-mailcow_1 | [1609404841] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609404844] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609404844] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609404844] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609404844] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609404844] unbound[1:0] debug: sending to target: <.> 198.41.0.4#53
unbound-mailcow_1 | [1609404844] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609404847] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609404847] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609404847] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609404847] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609404847] unbound[1:0] debug: sending to target: <.> 199.7.91.13#53
unbound-mailcow_1 | [1609404847] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609404850] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609404850] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609404850] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609404850] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609404850] unbound[1:0] debug: sending to target: <.> 193.0.14.129#53
unbound-mailcow_1 | [1609404850] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609404853] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609404853] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609404853] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609404853] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609404853] unbound[1:0] debug: sending to target: <.> 199.7.83.42#53
unbound-mailcow_1 | [1609404853] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609404856] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609404856] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609404856] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609404856] unbound[1:0] debug: request has exceeded the maximum number of sends with 33
unbound-mailcow_1 | [1609404856] unbound[1:0] debug: return error response SERVFAIL
unbound-mailcow_1 | [1609404856] unbound[1:0] debug: validator[module 0] operate: extstate:module_state_initial event:module_event_moddone
unbound-mailcow_1 | [1609404856] unbound[1:0] info: validator operate: query . NS IN
unbound-mailcow_1 | [1609404856] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_subquery event:module_event_pass
unbound-mailcow_1 | [1609404856] unbound[1:0] info: iterator operate: query . DNSKEY IN
unbound-mailcow_1 | [1609404856] unbound[1:0] info: processQueryTargets: . DNSKEY IN
unbound-mailcow_1 | [1609404856] unbound[1:0] debug: Failed to get a delegation, giving up
unbound-mailcow_1 | [1609404856] unbound[1:0] debug: return error response SERVFAIL
unbound-mailcow_1 | [1609404856] unbound[1:0] debug: validator[module 0] operate: extstate:module_wait_module event:module_event_moddone
unbound-mailcow_1 | [1609404856] unbound[1:0] info: validator operate: query . DNSKEY IN
unbound-mailcow_1 | [1609404856] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
My guess is unbound is trying to query different root dns servers. I took first ip it tried to connect to:
unbound-mailcow_1 | [1609404806] unbound[1:0] debug: sending to target: <.> 192.203.230.10#53
Iconnected to unbound container, installed dig and tried to query the same dns server:
dig google.com @192.203.230.10
; <<>> DiG 9.14.12 <<>> google.com @192.203.230.10
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 18628
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 13, ADDITIONAL: 27
;; WARNING: recursion requested but not available
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1472
;; QUESTION SECTION:
;google.com. IN A
;; AUTHORITY SECTION:
com. 172800 IN NS l.gtld-servers.net.
com. 172800 IN NS b.gtld-servers.net.
com. 172800 IN NS c.gtld-servers.net.
com. 172800 IN NS d.gtld-servers.net.
com. 172800 IN NS e.gtld-servers.net.
com. 172800 IN NS f.gtld-servers.net.
com. 172800 IN NS g.gtld-servers.net.
com. 172800 IN NS a.gtld-servers.net.
com. 172800 IN NS h.gtld-servers.net.
com. 172800 IN NS i.gtld-servers.net.
com. 172800 IN NS j.gtld-servers.net.
com. 172800 IN NS k.gtld-servers.net.
com. 172800 IN NS m.gtld-servers.net.
;; ADDITIONAL SECTION:
l.gtld-servers.net. 172800 IN A 192.41.162.30
l.gtld-servers.net. 172800 IN AAAA 2001:500:d937::30
b.gtld-servers.net. 172800 IN A 192.33.14.30
b.gtld-servers.net. 172800 IN AAAA 2001:503:231d::2:30
c.gtld-servers.net. 172800 IN A 192.26.92.30
c.gtld-servers.net. 172800 IN AAAA 2001:503:83eb::30
d.gtld-servers.net. 172800 IN A 192.31.80.30
d.gtld-servers.net. 172800 IN AAAA 2001:500:856e::30
e.gtld-servers.net. 172800 IN A 192.12.94.30
e.gtld-servers.net. 172800 IN AAAA 2001:502:1ca1::30
f.gtld-servers.net. 172800 IN A 192.35.51.30
f.gtld-servers.net. 172800 IN AAAA 2001:503:d414::30
g.gtld-servers.net. 172800 IN A 192.42.93.30
g.gtld-servers.net. 172800 IN AAAA 2001:503:eea3::30
a.gtld-servers.net. 172800 IN A 192.5.6.30
a.gtld-servers.net. 172800 IN AAAA 2001:503:a83e::2:30
h.gtld-servers.net. 172800 IN A 192.54.112.30
h.gtld-servers.net. 172800 IN AAAA 2001:502:8cc::30
i.gtld-servers.net. 172800 IN A 192.43.172.30
i.gtld-servers.net. 172800 IN AAAA 2001:503:39c1::30
j.gtld-servers.net. 172800 IN A 192.48.79.30
j.gtld-servers.net. 172800 IN AAAA 2001:502:7094::30
k.gtld-servers.net. 172800 IN A 192.52.178.30
k.gtld-servers.net. 172800 IN AAAA 2001:503:d2d::30
m.gtld-servers.net. 172800 IN A 192.55.83.30
m.gtld-servers.net. 172800 IN AAAA 2001:501:b1f9::30
;; Query time: 20 msec
;; SERVER: 192.203.230.10#53(192.203.230.10)
;; WHEN: Thu Dec 31 09:09:45 utc 2020
;; MSG SIZE rcvd: 835
As you can see, it works. So I can manually query dns servers, but unbound fails to do the same (from same container).
Any clue?
I also tried to query unbound from it’s own container dig google.com @127.0.0.1
so no inner network communication between containers. I get this in log:
unbound-mailcow_1 | [1609405965] unbound[1:0] debug: validator[module 0] operate: extstate:module_state_initial event:module_event_new
unbound-mailcow_1 | [1609405965] unbound[1:0] info: validator operate: query google.com. A IN
unbound-mailcow_1 | [1609405965] unbound[1:0] debug: iterator[module 1] operate: extstate:module_state_initial event:module_event_pass
unbound-mailcow_1 | [1609405965] unbound[1:0] info: resolving google.com. A IN
unbound-mailcow_1 | [1609405965] unbound[1:0] info: priming . IN NS
unbound-mailcow_1 | [1609405965] unbound[1:0] debug: iterator[module 1] operate: extstate:module_state_initial event:module_event_pass
unbound-mailcow_1 | [1609405965] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609405965] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609405965] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609405965] unbound[1:0] debug: sending to target: <.> 193.0.14.129#53
unbound-mailcow_1 | [1609405965] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609405966] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609405966] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609405966] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609405966] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609405966] unbound[1:0] debug: sending to target: <.> 199.9.14.201#53
unbound-mailcow_1 | [1609405966] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609405966] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609405966] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609405966] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609405966] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609405966] unbound[1:0] debug: sending to target: <.> 198.97.190.53#53
unbound-mailcow_1 | [1609405966] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609405967] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609405967] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609405967] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609405967] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609405967] unbound[1:0] debug: sending to target: <.> 192.112.36.4#53
unbound-mailcow_1 | [1609405967] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609405968] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609405968] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609405968] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609405968] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609405968] unbound[1:0] debug: sending to target: <.> 192.58.128.30#53
unbound-mailcow_1 | [1609405968] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609405969] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609405969] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609405969] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609405969] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609405969] unbound[1:0] debug: sending to target: <.> 202.12.27.33#53
unbound-mailcow_1 | [1609405969] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609405969] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609405969] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609405969] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609405969] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609405969] unbound[1:0] debug: sending to target: <.> 192.36.148.17#53
unbound-mailcow_1 | [1609405969] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609405970] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609405970] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609405970] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609405970] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609405970] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609405970] unbound[1:0] debug: sending to target: <.> 192.112.36.4#53
unbound-mailcow_1 | [1609405970] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609405972] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609405972] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609405972] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609405972] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609405972] unbound[1:0] debug: sending to target: <.> 202.12.27.33#53
unbound-mailcow_1 | [1609405972] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609405973] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609405973] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609405973] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609405973] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609405973] unbound[1:0] debug: sending to target: <.> 198.41.0.4#53
unbound-mailcow_1 | [1609405973] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609405974] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609405974] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609405974] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609405974] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609405974] unbound[1:0] debug: sending to target: <.> 199.9.14.201#53
unbound-mailcow_1 | [1609405974] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609405975] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609405975] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609405975] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609405975] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609405975] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609405975] unbound[1:0] debug: sending to target: <.> 198.41.0.4#53
unbound-mailcow_1 | [1609405975] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609405977] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609405977] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609405977] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609405977] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609405977] unbound[1:0] debug: sending to target: <.> 199.7.83.42#53
unbound-mailcow_1 | [1609405977] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609405978] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609405978] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609405978] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609405978] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609405978] unbound[1:0] debug: sending to target: <.> 199.7.91.13#53
unbound-mailcow_1 | [1609405978] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609405978] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609405978] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609405978] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609405978] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609405978] unbound[1:0] debug: sending to target: <.> 192.36.148.17#53
unbound-mailcow_1 | [1609405978] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609405980] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609405980] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609405980] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609405980] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609405980] unbound[1:0] debug: sending to target: <.> 192.5.5.241#53
unbound-mailcow_1 | [1609405980] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609405981] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609405981] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609405981] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609405981] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609405981] unbound[1:0] debug: sending to target: <.> 199.7.83.42#53
unbound-mailcow_1 | [1609405981] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609405982] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609405982] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609405982] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609405982] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609405982] unbound[1:0] debug: sending to target: <.> 193.0.14.129#53
unbound-mailcow_1 | [1609405982] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609405984] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609405984] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609405984] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609405984] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609405984] unbound[1:0] debug: sending to target: <.> 198.97.190.53#53
unbound-mailcow_1 | [1609405984] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609405985] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609405985] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609405985] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609405985] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609405985] unbound[1:0] debug: sending to target: <.> 192.203.230.10#53
unbound-mailcow_1 | [1609405985] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609405986] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609405986] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609405986] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609405986] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609405986] unbound[1:0] debug: sending to target: <.> 192.58.128.30#53
unbound-mailcow_1 | [1609405986] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609405987] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609405987] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609405987] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609405987] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609405987] unbound[1:0] debug: sending to target: <.> 199.7.91.13#53
unbound-mailcow_1 | [1609405987] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609405989] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609405989] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609405989] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609405989] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609405989] unbound[1:0] debug: sending to target: <.> 192.5.5.241#53
unbound-mailcow_1 | [1609405989] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609405990] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609405990] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609405990] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609405990] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609405990] unbound[1:0] debug: sending to target: <.> 192.33.4.12#53
unbound-mailcow_1 | [1609405990] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609405991] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609405991] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609405991] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609405991] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609405991] unbound[1:0] debug: sending to target: <.> 192.203.230.10#53
unbound-mailcow_1 | [1609405991] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609405993] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609405993] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609405993] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609405993] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609405993] unbound[1:0] debug: sending to target: <.> 192.33.4.12#53
unbound-mailcow_1 | [1609405993] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609405994] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609405994] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609405994] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609405994] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609405994] unbound[1:0] debug: sending to target: <.> 192.33.4.12#53
unbound-mailcow_1 | [1609405994] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609405997] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609405997] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609405997] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609405997] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609405997] unbound[1:0] debug: sending to target: <.> 192.58.128.30#53
unbound-mailcow_1 | [1609405997] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609406000] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609406000] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609406000] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609406000] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609406000] unbound[1:0] debug: sending to target: <.> 198.41.0.4#53
unbound-mailcow_1 | [1609406000] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609406003] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609406003] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609406003] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609406003] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609406003] unbound[1:0] debug: sending to target: <.> 202.12.27.33#53
unbound-mailcow_1 | [1609406003] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609406006] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609406006] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609406006] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609406006] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609406006] unbound[1:0] debug: sending to target: <.> 192.112.36.4#53
unbound-mailcow_1 | [1609406006] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609406009] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609406009] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609406009] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609406009] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609406009] unbound[1:0] debug: sending to target: <.> 199.7.83.42#53
unbound-mailcow_1 | [1609406009] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609406012] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609406012] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609406012] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609406012] unbound[1:0] info: sending query: . NS IN
unbound-mailcow_1 | [1609406012] unbound[1:0] debug: sending to target: <.> 199.9.14.201#53
unbound-mailcow_1 | [1609406012] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
unbound-mailcow_1 | [1609406015] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_reply event:module_event_noreply
unbound-mailcow_1 | [1609406015] unbound[1:0] info: iterator operate: query . NS IN
unbound-mailcow_1 | [1609406015] unbound[1:0] info: processQueryTargets: . NS IN
unbound-mailcow_1 | [1609406015] unbound[1:0] debug: request has exceeded the maximum number of sends with 33
unbound-mailcow_1 | [1609406015] unbound[1:0] debug: return error response SERVFAIL
unbound-mailcow_1 | [1609406015] unbound[1:0] debug: validator[module 0] operate: extstate:module_state_initial event:module_event_moddone
unbound-mailcow_1 | [1609406015] unbound[1:0] info: validator operate: query . NS IN
unbound-mailcow_1 | [1609406015] unbound[1:0] debug: iterator[module 1] operate: extstate:module_wait_subquery event:module_event_pass
unbound-mailcow_1 | [1609406015] unbound[1:0] info: iterator operate: query google.com. A IN
unbound-mailcow_1 | [1609406015] unbound[1:0] info: processQueryTargets: google.com. A IN
unbound-mailcow_1 | [1609406015] unbound[1:0] debug: Failed to get a delegation, giving up
unbound-mailcow_1 | [1609406015] unbound[1:0] debug: return error response SERVFAIL
unbound-mailcow_1 | [1609406015] unbound[1:0] debug: validator[module 0] operate: extstate:module_wait_module event:module_event_moddone
unbound-mailcow_1 | [1609406015] unbound[1:0] info: validator operate: query google.com. A IN
unbound-mailcow_1 | [1609406015] unbound[1:0] debug: cache memory msg=66072 rrset=66072 infra=11669 val=66352
So unbound is running and it’s receiving requests. But can’t resolve queries to outside dns servers. I would say it’s firewall issue, BUT… I can resolve manually (from same container) to outside dns servers just fine. So it’s NOT firewall problem. I would say it’s not even network problem.
I really hope someone can help me with this mystery. Thanks in advance!