Dacast needs ports 80, 443, or 1935 open to live stream. The first port that You use when streaming is 1935. Most setups should have these ports already opened by default.
You can find what ports are open on an OS X version of Mac fairly easily by doing the following:
STEP 1: Open “Network Utility,” located in the “Utilities” folder in the “Applications” folder, and click “Port Scan.”
STEP 2: Type your IP address, and then click the “Scan” button. To find your IP address, choose Apple > System Preferences, click Network, and then, select a network service, such as Ethernet or Wi-Fi.
Alternatively, you can try using the “Only test ports between” option to verify the ones Dacast uses. For example you can search on port 80 to 80 to see if that particular port is open.
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