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Ellessar
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Joined: Tue Apr 19, 2022 6:49 pm

Empty DNS responses

Tue Apr 19, 2022 7:00 pm

Hello there!
I'm using Mikrotik RouterOS v7.2.1 on hAP ac (mipsbe)
The router is sending empty responses to whatever DNS name I send to it.
[admin@MikroTik] > put [:resolve whateverbs.com]
failure: dns name exists, but no appropriate record

Win 10 to Mikrotik DNS:
nslookup whateverbs.com
Server:  router.mylan.local
Address:  172.23.41.1

Name:    whateverbs.com
Win 10 to Cloudflare DNS:
nslookup whateverbs.com 1.1.1.1
Server:  one.one.one.one
Address:  1.1.1.1

*** one.one.one.one can't find whateverbs.com: Non-existent domain
ip/dns config:
/ip dns
set allow-remote-requests=yes cache-size=4096KiB max-concurrent-queries=150 \
    max-concurrent-tcp-sessions=50 use-doh-server=\
    https://cloudflare-dns.com/dns-query verify-doh-cert=yes
Any help would be appreciated.
Last edited by Ellessar on Mon Sep 19, 2022 11:58 am, edited 2 times in total.
 
Ellessar
just joined
Topic Author
Posts: 4
Joined: Tue Apr 19, 2022 6:49 pm

Re: Empty DNS responses

Tue Sep 13, 2022 12:11 pm

Bump!
The error is still present in RouterOS 7.5 with cloudflare DoH. Returning empty answers instead of errors for non-existant domains leads to secondary DNS servers set on client (e.g. via VPN) not getting querried - because they get an answer from Mikrotik, although the answer is without any IP address.
 
Ellessar
just joined
Topic Author
Posts: 4
Joined: Tue Apr 19, 2022 6:49 pm

Re: Empty DNS responses

Tue Jan 17, 2023 5:07 pm

Still present in RouterOS 7.7.
In addition FWD entries are ignored.

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