How to add a network definition DNS host for a hostname which domain has already existing host definitions in UTM DNS?

Question

I have a domain, say mydomain.com . I have configured a static host for fw. mydomain.com to 192.168.1.1 in the UTM DNS. 
 How can I configure another host which is a part of the same domain, say bastion2. mydomain.com as a DNS host, telling UTM to look up bastion2. mydomain.com in the public DNS. In this case bastion2. mydomain.com is another UTM which is using DynDNS to update its public IP. 
 The use case here is that bastion2. mydomain.com is used as the remote peer for connecting a VPN S2S tunnel.

BAlfson · Accepted Answer

"mydomain.com points to the internal IP-adress for my webbserver" - that blocks the UTM from asking outside name servers for name resolution. Just change that to www.mydomain.com and you should be golden! 
 Cheers - Bob

ErikFranzen · Answer

Thanks! That did it!