What firewall configuration is required for NCTC cloudUC?

If your firewall does not have restrictive outbound policies from your LAN, no special firewall configuration is typically necessary. Some firewalls, however, employ a feature known as a SIP ALG or SIP Application Layer Gateway. This is a feature that is intended to aid in NAT traversal for VoIP, specifically SIP traffic, through the firewall. The SIP ALG feature typically will cause issues with NCTC cloudUC and it should be disabled on the firewall.

If your firewall does have restrictive outbound policy, there are specific destination IP addresses and TCP/UDP ports that must be permitted in order for your NCTC cloudUC service to operate correctly. Please contact NCTC cloudUC support for further information on the required IP addresses and ports that need to be opened on your firewall. NCTC cloudUC support can be reached at (615) 666-2151 or email support.