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Firewall and DNS Server Configuration

MCA can operate on MAS configured either behind a firewall in LAN mode (server-only), see

the figure below, or in Network Edge mode (server-gateway), see page 16, where the MAS

server provides the firewall. Refer to the Mitel Applications Suite Installation and Administration

Guide for information about MAS network deployments. The firewall or MAS Network Edge

configuration must provide Network Address Translation (NAT) for external connections to MCA

and for external clients and Web browsers to connect.

In addition, NAT connections (originated by the MAS server) to an external Domain Name

System (DNS) server must be provided. Tabl e 5 provides firewall port setting information when

configuring MCA on MAS. Refer to the Mitel Applications Suite Engineering Guidelines for

additional information about MAS configuration requirements.

Consider the following when configuring MCA.

• MCA must be behind a firewall or router that allows port mapping.

• You must have two external IP addresses available for MCA.

• Have two domain names (or subdomains) available when using address translation.

• External IP address 1 must be routed to Internal IP address 1.

• External IP address 2, port 443 (default) must be routed to Internal IP address 1 port

4443 (default).

In the following examples, the firewall does not rewrite the source address. The DNS is split.

Everyone uses the external name. Inside the firewall, it resolves to the internal address. Outside

the firewall, it resolves to the external address. To configure this, set the Web server name to

the external name. The customer can upload a certificate/key pair to the User Provisioning

Gateway (UPG).

Note: Ports 443 and 4443 are the default values in MCA. These ports values are what

you enter when configuring Web conference settings, see page 34.

Figure 1: MCA on MAS (LAN Mode)

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Mitel Speech Server Spezifikationen Seite 21