The Opengatekeeper support the GK discovery using DNS. If a endpoint try to call
a not registered user, Opengatekeeper try to find it first in the neighbours GKs
then if the user id likes as email address try to query the DNS to obtain the GK
that is covering the domain obtained from email address.

If you want that other GKs discover your in the same way add a RAS field to dns
configuration. If your GK address is gk.somedomain.net you must add a line like
this:

ras gk.somedomain.net

if you want you can specify a GK id as follow

ras gkid@gk.somedomain.net

for more information see H.225.0 recommendation.

the user must register on GK with a email address style name
i.e. myname@somedomain.net

