Additional information:
Sending a POST request to http:scg_ip:9080/Portalintf.
Looks like the request hits the vscg but responds with a 400 internal server error.
Looking at the CaptivePoral logs, I get these errors:
2014-09-17 15:44:05,173 CaptivePortal[blackListScheduler-2] DEBUG c.r.w.c.p.HostVerifier - Forbidden hosts:
2014-09-17 15:44:05,173 CaptivePortal[blackListScheduler-2] DEBUG c.r.w.c.p.HostVerifier - updateHostSet, portalMap: {}