Discovering NAT gateways

There are several agents that download Network Address Translation (NAT) information from known NAT gateways.

None of the agents listed in the table below is enabled in the default configuration. These agents require advanced configuration, and it is preferable not to enable them by default.

Table 1. NAT gateway agents
Agent name Function
CiscoNATTelnet The CiscoNATTelnet agent interrogates Cisco routers acting as NAT gateways. This agent downloads the static NAT translations by means of TELNET from the device. The translations are then used to identify within which part of the network a particular device exists.
Note: Before enabling this agent, it is necessary to configure Telnet access and the Telnet Helper.
NATNetScreen The NATNetScreen agent interrogates NetScreen® Firewalls acting as NAT gateways. This agent downloads the static NAT translations by means of TELNET from the device. The translations are then used to identify within which part of the network a particular device exists.
Note: Before enabling this agent, it is necessary to configure Telnet access and the Telnet Helper.
NATTextFileAgent The NATTextFileAgent mimics the function of the other NAT gateway agents by reading NAT mapping information from a flat file. The translations are then used to identify within which part of the network a particular device exists.
Note: Before enabling this agent, it is necessary to configure SNMP access and the SNMP Helper.