Hi Group, We have an issue here where we are not able to make inbound/outbound calls using a websocket application that uses sipjs. We think that wan.auto is not excluding IPv6. This problem is related to ICE. There was a bug on this that was fixed in 1.4.19. Additional info: - The platform is Kazoo - FS version: 1.4.23 (also tried upgrading to 1.4.26) - IPv6 is disabled in the OS We have the below in logs: [WARNING] switch_core_media.c:2790 NO candidate ACL defined, Defaulting to wan.auto [DEBUG] switch_core_media.c:5178 AUDIO RTP [sofia/sipinterface_1/ DPRD025488@somedomain.com] x.x.x.x port 24092 -> 2001::5ef5:79fd:207f:3d43:3f57:fe92 port 61975 codec: 8 ms: 20 [DEBUG] switch_rtp.c:3588 Not using a timer [INFO] switch_core_media.c:5352 Activating Audio ICE [NOTICE] switch_rtp.c:4029 Activating RTP audio ICE: bveNJceaOHdVG0Tq:tThuJX7NS3O8dtZ1 2001::5ef5:79fd:207f:3d43:3f57:fe92:61975 [INFO] switch_core_media.c:5395 Activating RTCP PORT 61975 [DEBUG] switch_rtp.c:3929 RTCP send rate is: 10000 and packet rate is: 20000 Remote Port: 61975 [DEBUG] switch_rtp.c:2349 Setting RTCP remote addr to :61975 [INFO] switch_core_media.c:5403 Skipping RTCP ICE (Same as RTP) [INFO] switch_rtp.c:3104 Activate RTP/RTCP audio DTLS client It would be great to have ideas on what could be the reason. Thanks, Sangram