If you are trying to connect to a webinar from work, a school, government, 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 or you may drop connection regularly (like every 10 seconds).
If webcast mode or new attendee experience is enabled, attendees should not be impacted even if they are failing our Firewall test.
What can you do?
If possible, please contact your IT department and have them open the necessary Ports (see below).
Minimum Requirement: Assumed by default is that TCP 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.
Best Experience: In addition to the minimum requirements being met, we recommend that UDP ports 1025 - 65535 be open.
More info: Our streaming server IP addresses change dynamically and can be any IP address, so you cannot allowlist an IP address range. 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.
Explicit Firewall rules for your IT department:
443/tcp ALLOW *.bigmarker.com
80/tcp ALLOW *.bigmarker.com
80/udp ALLOW *.bigmarker.com
53/udp ALLOW *.bigmarker.com
443/tcp (v6) ALLOW *.bigmarker.com (v6)
80/tcp (v6) ALLOW *.bigmarker.com (v6)
53/udp (v6) ALLOW *.bigmarker.com (v6)
53/udp ALLOW OUT *.bigmarker.com
80/tcp ALLOW OUT *.bigmarker.com
443/tcp ALLOW OUT *.bigmarker.com
443/udp ALLOW OUT *.bigmarker.com
53/udp (v6) ALLOW OUT *.bigmarker.com (v6)
80/tcp (v6) ALLOW OUT *.bigmarker.com (v6)
443/tcp (v6) ALLOW OUT *.bigmarker.com(v6)
443/udp (v6) ALLOW OUT *.bigmarker.com (v6)
If this does not work, have your IT department email email@example.com
- If you are behind an Application Firewall BigMarker will not be able to penetrate it unless it's disabled.
- If you do not believe you are behind a firewall, but are failing the firewall test, please check to see if Stealth Mode is enabled in AdGuard. BigMarker's website can't detect your firewall settings with this enabled. After disabling Stealth Mode, you should pass the Network Firewall check.
- We recommend disabling any anti-virus programs (ex: Kaspersky, Norton, McAfee, AVG, Windows Security Essentials, etc. Be sure to also disable Windows Firewall). Programs like these consume CPU resources, and may block ports needed for a successful webinar experience.