Client firewall requirements
TokBox services require access to specific ports. At a minimum the following requirements must be met:
- Open TCP port 443
- Whitelist the following domains:
- Whitelist the following HTTPS verification servers for our HTTPS certificate:
Along with the minimum requirements, opening UDP Port 3478 will give you a better experience. UDP is highly recommended over TCP for better quality audio and video. The protocol favors timeliness over reliability which is consistent with the human perceptive preferences; where we can fill in gaps but are sensitive to time-based delays.
This port only accepts inbound traffic after an outbound request is sent. The connection is bidirectional but is always initiated from the corporate network/client so it is not possible for an external entity to send malicious traffic in the opposite direction. For the best possible experience, we recommend opening UDP ports 1025 - 65535.
Application firewall requirements
Application servers using the TokBox server SDKs or REST API only need access to outbound web traffic over TCP port 443 with *.opentok.com whitelisted.