If you are trying to connect to a webinar from work, a school or religious organization, you may run into a Firewall issue. If have a network Firewall enabled, you may see a black video screen or a "Connection Can't Be Established" warning:
What can you do?
If possible, please contact your IT department and have them open the necessary Ports (see below).
Requirements: Assumed by default is that TCP and UDP ports 80 and 443 are open. Some firewall rules only allow for TCP traffic over port 443, make sure that all traffic can pass over this port. If you continue to experience issues, you may need to follow the rest of the rules below
More info: Our streaming server IP addresses change dynamically. If you are looking to add our domain to be allowed in your firewall, the easiest thing to do is to allow traffic from all bigmarker.com servers with *.bigmarker.com domain.
Pro-Tip: Allow all traffic over ports 80 & 443
We use WebSocket, so do not block WebSocket connections. We use RTP to carry the audio/video data, so do not filter the RTP package in the firewall.
Router configuration: Your organization's router might have some preconfigured settings that could disrupt your webinar's audio. You may need to disable SIP ALG within your router. Here's how your IT person can disable SIP ALG. For more information click here.
Explicit Firewall rules for your IT department:
443/tcp ALLOW Anywhere
80/tcp ALLOW Anywhere
443/tcp (v6) ALLOW Anywhere (v6)
80/tcp (v6) ALLOW Anywhere (v6)
80/tcp ALLOW OUT Anywhere
443/tcp ALLOW OUT Anywhere
443/udp ALLOW OUT Anywhere
80/tcp (v6) ALLOW OUT Anywhere (v6)
443/tcp (v6) ALLOW OUT Anywhere (v6)
443/udp (v6) ALLOW OUT Anywhere (v6)
If this does not work, have your IT department email firstname.lastname@example.org