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System Requirements

GCMS 2021 System Requirements


To prepare for GCMS 2021, make sure your technology is compatible with eShow virtual event platform. You are responsible for testing the equipment you will be using during the event in the location you plan to participate. Meet with your organization's IT department at least 24 hours prior to the event to ensure you can participate.

In order to make sure you receive your confirmation e-mail and other important event updates, please add mail2.netronixcorp.com to the SPF record in the sending domain DNS.


Preferred Browser: Chrome or Firefox (latest Versions, please update browsers)

Supported also: Safari, Edge (latest Versions, please update browsers)

IE not recommended

The video conferencing platform where you will participate in sessions is called BigMarker. Complete BigMarker System Check to make sure your browser is compatible with the platform.



For Attendees to have uninterrupted access: min. 20Mbps DOWNLOAD speed (Slower speeds can still log on but may experience issues)

For Presenters/Moderators/Host/Exhibitors: 20 Mbps UPLOAD/20 Mbps DOWNLOAD speed or greater is preferred. Presenters/Moderators/Hosts with slower speeds may incur some issues.
Conduct a speed test here:




SUPPORTED - Windows, MAC, Linux

WINDOWS: 10 for Best Experience (Windows 7 is no longer being supported by Microsoft , thus WILL have issues, Windows 8.1 has entered Microsoft Non-Support Window and WILL have issues)

MAC: OS X 10.6 or later

LINUX: RHEL 5.6 or later, openSUSE 11.3 or later, or Ubuntu 10.04 or later



Please turn off VPN



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







  • Be sure any pop-up blockers are turned off.
  • If after turning off your VPN you are still having problems accessing the virtual platform, please restart your computer.
  • Clear your cache and cookies prior to the event
  • Close any other applications on your computer if you experience difficulties during the event.

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