Skype for Business uses these ports and protocols:

Verify you have the latest version of Skype. Check your security software or Firewall settings to make sure they aren't blocking Skype. Are you using a VPN? If you are connected to a VPN and the call is unable to connect, then disconnect from the VPN and try the call again. Are you using a proxy server? The Advanced Connection Settings dialog box is where you can modify the settings that tell Skype for Business how to connect to the Skype for Business servers. Important: Normally, you do not need change your Skype for Business sign-in settings.

5061 TCP (SIP) - Used for SIP/MTLS authentication of A/V users. Communications flow outbound through the internal firewall

443 TCP (HTTP) - Used by Skype for Business clients/Lync connecting from outside the intranet for SIP communications

Return to mecca pdf. 1024-65535 UDP/TCP - Port range used for inbound and outbound media transfer through the external firewall

6891-6901 TCPPort range used by Skype for Business/Lync clients for file transfer

Make sure your firewall is not blocking these and it should work. I suspect that it is a firewall issue since it works internally on the same network.

Skype For Business Mac You're Not Configured To Connect To The Server Ip

Connection Blocking settings apply to the incoming and the outgoing connections that use a specific application, service, port, or IP address.

You can use the Connection Blocking window to configure whether an application or a service that is allowed to connect to the Internet or to the local network. You can select the required network location from the Editing settings menu and configure the Connection Blocking settings.

You can configure the Connection Blocking settings only if the Connection Blocking option is turned on in the Advanced window.

Skype For Business Mac You're Not Configured To Connect To The Server Pc

You must have a user account that has administrator privileges to perform this task.

1. Start Norton.

   If you see the My Norton window, next to Device Security, click Open.

2. In the Norton product main window, click Advanced or Settings.

3. On the left pane, click Firewall.

4. In the Connection Blocking row, click the settings icon.

5. In the Connection Blocking window, in the Editing settings menu, select the network location for which you want to configure the connection blocking settings.

6. Select an option in the View menu.

   The options that appear in the View menu vary depending on the network location that you select in the Editing settings menu.

   Your options are:

   Applications	Lets you specify the Connection Blocking settings for the applications that run on your Mac.
   Services/Ports	Lets you specify the Connection Blocking settings for the services and ports that run on your Mac.
   Zones	Lets you specify the IP address to or from which firewall allows or blocks connections.
   All, in order of precedence	Lets you specify the current Connection Blocking settings for the Applications, services, ports, and zones in the order of precedence.

7. Select one of the following tabs:

   Incoming	Lets you specify the access settings for the incoming connections that use an application or a service that runs on your Mac.
   Outgoing	Lets you specify the access settings for the outgoing connections that use an application or a service that runs on your Mac.
   Incoming & Outgoing	Lets you configure the access settings for connections to and from the IP addresses that you specify. This tab appears only when you select Zones in the View menu.

8. Use the Action pop-up menu at the bottom of the Connection Blocking window to specify other connection blocking preferences. Your options are:

   Logging and notification settings	Lets you specify the type of access attempts for which your Norton product must maintain records. You can also specify the type of access attempts about which your Norton product must notify you.
   Advanced settings	Lets you specify the advanced firewall options.
   Reset to defaults	Lets you reset configuration to default level.

9. Click Done.