Strange DNS behaviour

RouterOS General
1

Hi forum.

After updating my Mikrotik to ROS 5.5 I have some strange problems with DNS.
People trying to connect cannot see the login page (hotspot.domain.de/login gives error)
I figured out that the router does not know his own address.
It worked fine before the update.

/ip hotspot profile : ..dns-name=“hotspot.domain.de”..
/ip address : 3 D 86.103.175.18/32 213.178.64.126 pppoe-out1
/ip DNS DNS-Settings : DNS-server : our DNS

but ping hotspot.domain.de → 86.103.172.212 Timeout

In our logs I can see that the MT did not have this IP 86.103.172.212 in the last 30 days.
Where does it come from ?

pppoe-out1 : use peer-dns : no
ppp profile : default - DNS server : our DNS

Our DNS knows the the correct IP

I just updated and did no configuration changes.
It worked with ROSs 2.9.46, 3.10, 3.25, 3.30 and 4.11
What has changed to 5.5 ? I did not find anything in the release notes or the forum.

Please help.

2

Nothing has changed as far as I can tell. 5.5 works perfectly fine for me (with an external DNS server resolving the Hotspot router domain name).

Flush the cache on the client.
Check for static entries in the IP > DNS section - the router rewrites (and always has rewritten) DNS requests to itself. Static entries in the router’s own DNS section would override anything else since it has local resolution immediately and doesn’t need to query upstream..