This chapter contains Communications Express basic deployment architectures. Depending on the features you want to implement in your deployment, you will need to install different sets of hosts and other networking infrastructure.
This chapter contains the following sections:
This basic Communications Express architecture provides Calendar, Address Book, and Mail modules in a web container on a single host. Messenger Express is the standalone web interface mail application that uses the HTTP service of the Messaging Server. Messenger Express is deployed on the same system as the Calendar and Address Book modules.
To provide this basic functionality, you need to install the following components:
Directory Server
Access Manager (If you are using Sun Java System LDAP Schema Version 2)
Calendar Server
Messaging Server
Web Server or Application Server (for the web container)
In this example:
You install the complete set of Messaging Server packages on the host that Communications Express is running on.
The AddressBook server of Communications Express is configured to store its data in the LDAP directory infrastructure.
SSL has not been configured.
Figure 26–1 shows the basic Communications Express architecture.
The following table explains the protocols and port numbers used by this architecture.
Table 26–1 Protocols And Ports Used by Basic Communications Express Deployment Architecture
Protocol |
Port |
Used By |
---|---|---|
SMTP |
25 |
Messaging Server MTA component to communicate with other systems, and Calendar Server (csenpd) components for email notifications |
HTTP |
80 |
Internet users to communicate with Communications Express front-end, and Communications Express to communicate with Messaging Server |
HTTP |
81 |
Calendar Express on Communications Express to communicate with Calendar Server |
MSHTTP |
82 |
Internet users to communicate with Messenger Express |
LDAP |
389 |
Messaging Server and Calendar Server to communicate with LDAP directory |
Figure 26–2 shows a Communications Express architecture for both intranet and Internet users. The intranet users log on to the Communications Express back-end host. The Internet users log on to the Communications Express front-end host in the DMZ, which then communicates with the back-end host. Single sign-on is enabled on the back-end host.
You install the front-end host with the following components:
You install the back-end with the following components:
Communications Express
Web container
Messaging Server (Messenger Express)
Calendar Server
Directory Server
Access Manager
Figure 26–2 shows the Communications Express on remote host architecture.
The following table explains the protocols and port numbers used by this architecture.
Table 26–2 Protocols And Ports Used by Communications Express Remote Host Deployment Example
Protocol |
Port |
Used By |
---|---|---|
HTTP |
80 |
Internet users to communicate with the Communications Express front-end host in the DMZ |
HTTP |
81 |
Messaging Express Multiplexor (MEM) on the Communications Express front-end host in the DMZ to communicate with Messenger Express on the back-end host behind the DMZ |
HTTP |
82 |
Communications Express on the back-end host to communicate with Calendar Server, also on the back-end host |
LDAP |
389 |
Messaging Server and Calendar Server to communicate with LDAP directory |
HTTP |
8081 |
Communications Express on the front-end host to communicate with Calendar Server on the back-end host |