Firewall Configuration

If you are using a firewall and not using a reverse proxy, you may have to allow traffic to port 3000:

sudo firewall-cmd --permanent --add-port=3000/tcp

sudo systemctl reload firewalld

To communicate with Rocket.Chat cloud services, and depending on the services you want to use, you need to whitelist the following URLs in your firewall configuration:

`cloud.rocket.chat`	This URL is required for workspace registration, workspace client authentication, and sync license and communications.
`marketplace.rocket.chat`	List and install marketplace apps.
`releases.rocket.chat`	Check for new versions.
`billing.rocket.chat`	Checkout and tier subscription management.
`gateway.rocket.chat`	Gateway for Rocket.Chat mobile app push notifications.
`omni-gateway.rocket.chat`	Gateway for communications for omnichannel apps (such as WhatsApp, Facebook, Instagram, and Telegram).
`collector.rocket.chat`	This URL is used to collect usage statistics. Community workspaces must whitelist this URL, or the workspaces will enter read-only mode. Note that running Rocket.Chat in air-gapped mode requires a premium license.
`nps.rocket.chat`	NPS collector.