Use TLS for SIP Interfaces and Block TCP/UDP Ports
Each port can be vulnerable to attacks. Therefore, it's highly recommended that your SIP interfaces use only TLS. When configuring your SIP Interfaces, define the TLS port number, but set the UDP and TCP ports to zero ("0"). This configuration blocks (disables) the UDP and TCP ports. In other words, to disable UDP and TCP ports, you must define SIP Interfaces. In addition, to increase security, define only SIP Interfaces that are necessary.
| ➢ | To configure TLS for SIP Interfaces: |
| 1. | Open the SIP Interfaces table (Setup menu > Signaling & Media tab > Core Entities folder > SIP Interfaces). |
| 2. | For the relevant SIP Interface, configure the following: |
| ● | In the 'UDP Port' field, enter 0. |
| ● | In the 'TCP Port' field, enter 0. |
| ● | In the 'TLS Port' field, enter a port number (non-zero). |
Configuring TLS for SIP Interface
