This section describes using Connectivity Check to verify inbound and outbound service requirements for Cloud Connector Edition (CCE) and to check connectivity for interfacing with Microsoft Teams Direct Routing.
Running Connectivity Check
To check connectivity required for services and ports used with CCE and Teams, complete the following steps:
- In the WebUI, click the Diagnostics tab.
In the left navigation pane, click Teams Direct Routing > Connectivity Check.
- Specify the values for each field for the service for which you need to verify port readiness. For SIP/TLS (TCP), the primary and secondary server IP addresses are hard-coded (not editable).
Click Apply. Service connectivity is checked and the Connectivity Check results display.
For example, after connectivity is checked for DNS (TCP), the message: "DNS TCP check on <ip address>: Port (<ip address:port number>) is open" displays in the Connectivity Check Results. A second result using the same format displays the results for the Secondary Server specified. For more information, refer to Connectivity_Check_Results.
- Repeat Steps 3 and 4 for each service that requires verification of port readiness.
Connectivity Checks - Field Definitions
Specify the values for fields to specify the services for which Connectivity Check will verify port readiness.
Connectivity Check - Results
|Service and Protocol||Port||CCE||Teams
|Description||Connectivity Check Results|
|SIP/MTLS (TCP)||5061||Handles signaling for voice communications|
|STUN (TCP)||443||STUN/TURN negotiation of candidates|
|STUN (UDP)||3478||Determines the version of the Edge Server with which the
Skype server is communicating
|SIP/TLS (TCP)||5061||Handles signaling for voice communications; primary and secondary server IP addresses are hard-coded.|
|RTP (UDP)||16384 - 17584||Handles media for voice communications|
For the service that resolves the Public FQDN for the Microsoft Signaling Server, the Connectivity Check populates a default destination from the Host Name and Domain Name attributes in Host Information (that is, Web UI's Settings > System > Node-Level Settings). The tool opens the UDP socket and sends a homemade DNS packet.
|If the remote server responds with a DNS response packet the port is reported as open. Otherwise, the port is reported as closed.|
|NTP (UDP)||123||Service to support timestamps in certificate usage|
Certificate revocation check and Certificate Revocation
The host field is filled by default with the FQDN found in the SBC certificate, under the attribute: CRL Distribution Point.
|RTP (UDP)||49152-65535||Handles media for voice communications|
Handles signaling for voice communications; primary and secondary server IP addresses are hard-coded.
|STUN (TCP)||443||For the service handling STUN/TURN negotiation of candidates, the Connectivity Check opens a UDP socket and sends a homemade STUN packet.||If the remote server does not respond with a STUN error packet, the port is reported as closed. The remote peer is the Microsoft Cloud Edge Server and the STUN protocol determines the Public IP address.|
For the STUN service that determines the version of the Edge Server with which the Skype server is communicating, Connectivity Check populates a default destination from from the Host Name and Domain Name attributes in Host Information (that is, Web UI's Settings > System > Node-Level Settings). The tool opens the UDP socket and sends a homemade DNS packet.
|If the remote server responds with a DNS response packet the port is reported as open. Otherwise the port is reported as closed.|
Service to resolve Microsoft Signaling Server Public FQDN
For CCE, the Connectivity Check routes to sip.YourSbcDomain