ID: 545

Firewall Port Requirements

for Zoom Server

In order to access the Zoom Server, the following ports have to be opened:

Port Required for Desktop Required for Web Client Required for Web Approval (Lightbox) Description
8880 Yes No No Zoom Server
8443 Yes No No Web Administration & API access
8873 Yes Yes Yes Preview Server
9443 Yes* No No *SSL/TLS Web Administration
8973 Yes* Yes* Yes *SSL/TLS Preview Server 
8983 No No No Zoom Curator Service
8984 No No No *SSL/TLS Zoom Curator Service
8874 No No No Zoom NonStop Server to Server Data Transfer
18880 No No No Zoom NonStop Server to Server Control Messages
7770 Yes No No Zoom Client Proxy to Adobe plugins

To test TCP port connectivity, you may find this article useful.