DHCP server is pushing both internal and received dynamic IPs to clients

RouterOS General
1

MT router behind provider’s router receives dynamic DNS 192.168.0.1
MT router IP: 192.168.128.1

Settings:

/ip dns set allow-remote-requests=yes
/ip dns static add address=192.168.128.1 name=router.lan
/ip dhcp-server add address-pool=dhcp interface=bridge name=defconf
/ip dhcp-server network add address=192.168.128.0/24 comment=defconf gateway=192.168.128.1 netmask=24

All clients are getting both 192.168.0.1 and 192.168.128.1 as DNS servers.
To my understanding only the MT internal DNS address (192.168.128.1) should have been pushed.
I don’t understand, pls help.

2

I think it can be overwritten by setting DNS server in /ip dhcp-server network

3

It is not overwritten:

/ip dhcp-server network print
Columns: ADDRESS, GATEWAY
# ADDRESS           GATEWAY      
;;; defconf
0 192.168.128.0/24  192.168.128.1
4

I mean, the behaviour can be overwritten by setting the DNS server explicitely:

/ip dhcp-server network add address=192.168.128.0/24 dns-server=192.168.128.1 comment=defconf gateway=192.168.128.1 netmask=24
5

There is a separate checkmark “No DNS” to remove the automatic DNS servers from the list of DNS servers distributed via DHCP.
You can still distribute statically configured DNS servers.

6

Yes, thanks, that works, but it is then just a workaround, I would like to unterstand the behavior.

7

Here is the doc: https://help.mikrotik.com/docs/display/ROS/DHCP#DHCP-Network

8

Thanks.
I had a look at my other installations, and I recognized that that pushing received or set DNS as secondary DNSs is the normal operation.
I was mistaken, sorry.