The standard installation of Live Monitoring does not include Network Address Translation (NAT) and Firewall access. To enable NAT and Firewall access, change the NAT settings and the open ports in the firewall for Live Monitoring.
If a strict firewall is used, open these ports in the firewall to enable Live Monitoring to pass through:
TCP:
30400: used by RMI service
30500, 30501: for configuration service, these ports can be changed in config_manager.xml.
30600, 30601: for core, these ports can be changed in core.xml
UDP:
37000-37100: for RTP streams, these ports can be changed via the Call Recording Web interface under Settings > Recorders > API – Datagrams ports start/end