If you are connecting to ISS Admin service behind a NAT router using ISS Setup, IP address scope issue may arise: IP devices and ISS Admin service are running in the same subnet behind the NAT router, but ISS Setup is connecting from the outside of the NAT router. In most of this case, the registered IP addresses of the IP devices are private IP addresses, and ISS Setup won’t be able to use the private IP addresses when it is connecting from the outside of the NAT router.

You can address this issue for IP cameras/video encoders using ISS protocol and ISS compatible DVRs/NVRs by using FEN and forwarding the corresponding ports. But when you have many different IP devices, even this approach is not manageable.

• configure all IP cameras/video encoders using ISS protocol and ISS compatible DVRs/NVRs to use FEN

• forward the admin port for each of them

• register them to ISS Admin using FEN names

Typically, it is advised to run ISS Setup in the same subnet where the IP devices are running for security issues.