I Failed the Network System Check

Follow the steps below to troubleshoot if you have failed the Network System Check

What can you do? 

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.

If webcast mode or new attendee experience is enabled, attendees most likely will not be impacted if they are failing our Firewall test. 

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 support@bigmarker.com

Troubleshoot tip: 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. Similarly, if you have Kaspersky enabled, please disable that.