To allow connections between the Zoom Meetings Hybrid module, the Zoom Node server, Zoom, and the Zoom Meeting client, the following firewall rules need to be added to your network.

How to configure a firewall for the Zoom Meetings Hybrid module

If your Zoom Hybrid Meetings module is behind a firewall, please also set the following parameters:

Protocol	Ports	Source	Destination
TCP	80	MeetingConnector.IP MeetingConnector.IP2 MeetingConnector2.IP MeetingConnector2.IP2	ocsp.digicert.com*
UDP	8801, 8802, 8803	Hybrid MMRs and ZC	Zoom’s IP range
UDP	8801, 8802, 8803	Hybrid MMR-1	Hybrid MMR-2*
TCP	80, 443	Zoom Node server	Zoom’s IP range
UDP	8801, 8802, 8803	Client	Hybrid MMRs
TCP	80, 443	Client	*.zoom.us *.zoomonprem.com
TCP	80, 443	Client	Hybrid MMRs
TCP	443	Hybrid MMRs	*.zoom.us https://zoom-general.s3.amazonaws.com https://monitoring.*.amazonaws.com *.zoomonprem.com one.digicert.com acme.digicert.com

*Note: This is only required if running internal mode. 

**Note: For ocsp.digicert.com, the firewall needs to allow http and https traffic, as well as DNS resolution.