Hi,
 
Assuming I have 3 gateways, GW-a, GW-b, and GW-c.  All of them can REGISTER without username and password by having an entry in the trusted table.
Is it possible to config Opernser so that GW-a and GW-b can route to GW-c (using INVITE) without username and password, but any INVITEs from GW-c will not be accepted?
 
Thanks in advance for your suggestion.
 
Regards,
Mark