bind overwrites IPv4 with IPv6 result?

A Former User

Hi,

I am using the bind9 package and I have it configured to forward all queries to a ad-blocking DNS server. Working fine so far.

Now I am having issues with some domains.

So I can not connect to www.komoot.de. For troubleshooting I used the Linxu command line tools (192.168.90.254 is my pfSense):

root@backup:~# host www.komoot.de 192.168.90.254
Using domain server:
Name: 192.168.90.254
Address: 192.168.90.254#53
Aliases: 

www.komoot.de is an alias for komoot-web-live-2021.eu-west-1.elasticbeanstalk.com.
komoot-web-live-2021.eu-west-1.elasticbeanstalk.com has address 127.0.0.1
komoot-web-live-2021.eu-west-1.elasticbeanstalk.com has IPv6 address ::1

So I am getting the localhost address back- which means it is filtered to block ads.

But when I am querying the configured uplink server I am getting a different result:

root@backup:~# host www.komoot.de 176.9.93.198
Using domain server:
Name: 176.9.93.198
Address: 176.9.93.198#53
Aliases: 

www.komoot.de is an alias for komoot-web-live-2021.eu-west-1.elasticbeanstalk.com.
komoot-web-live-2021.eu-west-1.elasticbeanstalk.com has address 46.51.200.161
komoot-web-live-2021.eu-west-1.elasticbeanstalk.com has address 52.213.132.182
komoot-web-live-2021.eu-west-1.elasticbeanstalk.com has IPv6 address ::1

So we see we are getting a proper IPv4 address back, but no useable IPv6 one (localhost).

When I do the same on another Debian host configured not to do any IPv6 I am getting the result without the IPv6 address and everything is fine...

Now I am wondering why bind overwrites the received IP4 result with the one it gets from IPv6? I am not using IPv6 at all, hoiw can I disable this behaviour?

Thanks a lot!
/KNEBB