With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
natAddrMapLocalPortFrom
nat Addr Map Local Port From
1.3.6.1.2.1.123.1.4.1.8
If this conceptual row describes a Basic NAT address mapping, then the value of this object must be zero. If this conceptual row describes NAPT, then the value of this object specifies the first port number in the range of ports being mapped. The value of this object must be less than or equal to the value of the natAddrMapLocalPortTo object. If the translation specifies a single port, then the value of this object is equal to the value of natAddrMapLocalPortTo.
Back to NAT-MIB MIB page.
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