This is still working less than ideal.
On a fresh install, the installs points the DNS servers inside the CHROOT environment at google's DNS servers (8.8.8.8 and 8.8.4.4). This causes nothing to be able to resolve unless you have a public DNS entry for anything you are pointing gluu's processes at (AD servers, email servers, syslog, etc.)
Ideally, this should stay in sync with the Host OS's DNS servers in /etc/resolv.conf or be configurable in the GUI. Changing the DNS server in the Gluu GUI under configuration --> System Configuration does not appear to do anything.