Webinar Troubleshooting

Browser Connectivity
Desktop Support 

On desktop, we support Chrome, Firefox, Safari and Edge.

Mobile Support

On mobile, we have native browser support for latest versions of both iOS and Android OS. Any Attendees joining an event on mobile will be able to join directly through their Unique Join Link.

Firewall Issues

Diocesan/parish networks often restrict connection to our webinar platform, Demio, which can cause other connectivity issues.

For issues with network and firewall restrictions, you can either try to join on another network like a personal hotspot, or you can send the following information to your IT team so they could help establish the connection:

Demio uses dynamic IP addresses and you’d need your IT team to whitelist the below domains to connect:


When it comes to the ports used by the Demio streaming service, recommendations are as follows:

Minimum: Demio requires TCP port 443 to be open. Some firewall/proxy rules only allow for SSL traffic over port 443. You will need to make sure that non-web traffic can also pass over this port.

Better: In addition to the minimum being met, Demio also recommends that UDP port 3478 is open.

Best: For the best possible experience, Demio recommends that UDP ports 1025 – 65535 be open.