Hi Everyone, I just bought the Freeswitch 1.6 Cookbook and trying WebRTC for first time. I tried example using WSS binding on Sofia, and while the call can be connected, but the video/audio is not exchanged. I use Mozilla firefox for browser and using FS behind NAT. The log on firefox show: ICE failed, see about:webrtc for more details. I look at the log at about:webrtc and find the SDP from FS: a=candidate:7177910904 1 udp 659136 43.xx.xx.xx 16422 typ host generation 0 It only show the public IP (that I hard code on internal.xml on ext-rtp-ip and ext-rtp-sip), but I think it is missing FS local IP as raddr part (in internal.xml rtp-ip is 10.xx.xx.xx) and on FS log I find this: 2016-09-20 22:57:55.098364 [INFO] switch_ivr_originate.c:1215 Sending early media 2016-09-20 22:57:55.098364 [WARNING] switch_core_media.c:3391 NO candidate ACL defined, Defaulting to wan.auto WTF TOT 5 WTF TOT 5 WTF TOT 5 2016-09-20 22:57:55.098364 [WARNING] switch_core_media.c:3391 NO candidate ACL defined, Defaulting to wan.auto 2016-09-20 22:57:55.698365 [INFO] switch_core_media.c:6609 Activating Audio ICE and also when first startup the FS, I found: 2016-09-20 22:53:01.446345 [NOTICE] switch_loadable_module.c:556 Adding Limit interface 'db' 2016-09-20 22:53:01.664127 [INFO] switch_core_sqldb.c:1693 sofia:external Starting SQL thread. 2016-09-20 22:53:01.664216 [ERR] sofia.c:3539 Ignoring invalid name '' 2016-09-20 22:53:01.945344 [CONSOLE] switch_loadable_module.c:1538 Successfully Loaded [mod_dptools] Otherwise setting the ext-rtp-ip/ext-sip-ip/rtp-ip/sip-ip my intenal.xml config is vanilla. Can anyone help? Thanks, Regard Donny