To ensure a better experience, icastGo uses many advanced features of your browser.
There are certain technical requirements that must be met, such as using a relatively modern web browser.
These prerequisites are summarized on this page
We strongly advise you to perform both technical tests:
| Test your network | Audio and Video Test |
|---|
In this article :
Network requirements
icastGo is a platform hosted on the cloud and therefore theoretically accessible through any Internet connection. However, some corporate firewalls may need to specifically authorize certain ports.
Firewall configuration
| 443 (TCP) | HTTPS outgoing port |
| 40000-49999 (UDP)* | WebRTC UDP outgoing ports for transmitting video and audio from a browser |
| 40000-49999 (TCP)* | When outgoing UDP is not available WebRTC TCP outgoing ports for transmitting video and audio from a browser |
*If the 443 (TCP) post is the only available outgoing port, then the WebRTC connection will be established on this port as a fallback.
Meeting servers addresses
Meeting servers are accessible on the meet.icastgo.com domain.
As of May 10, 2020 the IP addresses of the servers* are as follows
52.60.80.75
52.60.105.48
15.222.227.50
15.222.156.13
15.222.165.146
15.223.111.248
15.222.192.212
15.222.198.204
35.181.91.85
3.7.148.67
15.188.121.49
*this list is subject to change so we recommend using a sub-domain rather than IPs in your firewall configuration.
VPN Configuration
For better performances and latency during audio and video calls we recommend to enable split tunneling for VPN connections.
Split tunneling allows precisely identified traffic to not be handled by the VPN but by the local Internet access of the speaker.
We recommend to add the following domains as non-VPN traffic :
| Domain | Audience | Purpose | Traffic | Typical per user bandwidth |
| meet.icastgo.com | Speakers | Audio-video traffic and VMR control | HTTPs, WebRTC | ~3 Mpbs Up/Down |
| mediacdn.icastgo.com | Participants | Webcast media | HTTPs | 1,5 Mbps Down |
| assetscdn.icastgo.com | Participants | Webcast Slides | HTTPs | 3 kpbs Down |
| appcdn.icastgo.com | Participants | Webcast Data | HTTPs | Negligible |
Proxy configuration
We recommend whitelisting the *.icastgo.com sub-domain.
In particular, the application uses two advanced technologies:
- long running HTTP requests (Sever Sent Events)
- WebSockets
And advanced proxy filtering or caching could interfere with these technologies.
Browser requirements
Important note: icastGo is compatible with all browsers for participants.
However, for speakers who use their browsers to transmit audio and video or simply to collaborate live during a webcast, we recommend the latest versions of the following browsers:
- Google Chrome version 61 and later
- Mozilla Firefox version 60 ESR and later
- Microsoft Edge version 74 and later
- Opera version 53 and later
- Apple Safari version 11.1 and later on macOS. Apple Safari on iOS 11.2 and later.