To configure NAT entries for messaging gateways or endpoints, use the http external command in Cisco UMG NAT configuration mode. To clear the configuration, use the no form of this command.
http external ip_addr port-number
no http external ip_addr port-number
Syntax Description
ip_addr
External IP address for HTTP port on NAT device in front of destination.
port-number
Listening port number for HTTP requests on NAT device in front of destination.
Command Default
The default port number for HTTP requests is 80.
Command Modes
Cisco UMG NAT configuration (config-nat)
Usage Guidelines
If multiple messaging gateways are behind the same NAT device, endpoints should have the capability to talk to messaging gateways on other ports in addition to 80 and 25 (VPIM), because they may be sharing the same external IP address.
Examples
The following example sets the external IP address and listening port for HTTP requests: