The device resolver is not supported if you use network
address translation (NAT) to translate an IP address in your local
network to a different IP address known within another network. The
device resolver is also not supported when translating an IP address
to a different IP address or source port number combination.
Using NASThe network access server (NAS) sends a RADIUS message to the
SafeLinx Server each time a mobile client connects to the NAS. The RADIUS message contains the IP
address allocated to the mobile device and a unique device identifier, such as a phone number or
user ID. On all subsequent requests from the mobile device, the SafeLinx Server uses this
information to establish a mapping between the mobile device IP address and the unique identifier.
Using NATIf a NAT computer exists in the network between the mobile device
and the SafeLinx Server, the source IP address is then changed to an address assigned by the NAT
computer. Typically, this address reassignment is dynamic, so an individual device might not be
assigned the same IP address each time it connects to the network. The problem is that the IP
address in the RADIUS message does not match the address assigned by the NAT computer. The NAT
computer modifies the source address of the device request and does not generally have awareness of
the data that is flowing through it.