Can't ping UTM using Hostname

Hello,

I can't ping the Sophos UTM using its hostname.  Can anyone reply with a couple ideas of things to try?

Sophos UTM 192.168.1.1:4444 - Which I can ping 192.168.1.1

However, I can't ping - firewall.example.house

Management - System Settings - Hostname = firewall.example.house

Management - HTTPS Cert - Re-generate WebAdmin - Previously I had changed the name and re-generated the certs - got a new cert with firewall.example.house

Interfaces - Interfaces - I tried entering the firewall.example.house into the hostname on the internal NIC.

Checked - Allow ICMP on gateway
Checked - Allow ICMP through gateway
Checked - Allow ICMP through Gateway from external networks

Checked - Gateway is ping visible
Checked - Ping from gateway

Also firewall.example.house is setup for DDNS in Sophos.

Trying to browse internally to firewall.example.house:4444 with an SSL cert instead of 192.168.1.1:4444

Thanks,

~Aaron