An HTTP reverse proxy is required in your perimeter network for:
- External user access, specifically for group expansion and
address book download.
- Web conferencing meeting content download by remote, federated,
and anonymous users.
- Client and device software updates to remote users.
- Communicator Web Access, which should be placed behind the
reverse proxy.
The HTTP reverse proxy provides a single discoverable IP address through which external users can download content from the internal Web Components (IIS) Servers. The Web Components Servers in turn use the reverse proxy to download expanded distribution lists, Address Book files, and meeting content for external users. All communication between a reverse proxy and internal Web servers occurs over HTTPS (TLS over HTTP) and therefore is encrypted.
For details about deploying and configuring an HTTP reverse
proxy, including configuring your firewall to work with a reverse
proxy, see