DNS Server issue on MikroTik router

RouterOS General
1

Hello,

I’ve setup a new 2011UiAS-2HnD.
The device has 3 interfaces bridged together that are :

  • ether2 (gigabit switch)
  • ether6 (fast ethernet switch)
  • wlan1

To this i added a guest Wireless network, using a virtualAP type, wlan2.

Everything is working fine except the DNS Server from the MikroTik.
It answers request from the wireless network but not from the Ethernet network (both are bridged and using the same network).
I had to setup the DHCP Server to use external DNS Servers to be able to use DNS’.

Here is the config :

servers: 8.8.8.8,4.4.4.4
dynamic-servers:
allow-remote-requests: yes
max-udp-packet-size: 4096
query-server-timeout: 2s
query-total-timeout: 10s
cache-size: 2048KiB
cache-max-ttl: 1w
cache-used: 86KiB

Any tip please?
Thanks!

2

I think that stations are not asking mikrotik. Check the ip configuration of the station if it is correctly set.
Or maybe some firewall rule blocking access?

3

Hi,

I did a “dig” command to ask the MikroTik router directly and it did not answered.
The DNS Server was set up correctly.

Once i’ve changed DNS Servers to Google Public DNS Servers it worked from the Ethernet LAN.

Concerning the firewall, only rules applying to the pppoe-out interface were enabled so i guess it was not a firewall issue.

Anything else i can check?

Thanks.