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Page 4 of 5
Opening ports required by Joost
If you know that your ISP allows you to use UDP but still can't see any video, you'll need to check that your firewall or router is configured to allow access by Joost application. In particular, make sure that the following are enabled:
- TCP access, outbound, to ports 80, 443 and 5223.
- UDP access, outbound, to port 33333.
- If you have a public IP address and UDP inbound on port 33333 is unfiltered, the
client may use UDP on port 33333 inbound. - If you want to chat from within Joost, you'll also need to enable inbound TCP
access to port 5223.
Check also that your network has DNS servers configured - Joost client makes regular DNS requests like any other application.
