[Freeswitch-users] Using verto between two FS boxes

Hello, I'm trying to route calls between two FS boxes separated by a firewall that only allows http/websocket connection. Is it possible to use verto to connect two FreeSwitch boxes? I tried using the approaches listed on the mod_verto wiki page but the bridge application fails to originate calls tithe other box with reason "USER_NOT_REGISTETED". SIP over websocket would also work for me but I couldn't figure out how to configure that as an origination option in the bridge application. Thanks, Andy