If the managed port (ETH 1) is disabled, you'll need to find a way to enable it. This might involve accessing the device through a console port or through another enabled interface.

Hi,
Try accessing via the console and then activating the port to access normally on the managed port ETH1.

you can use direct cable to connect with IAG, try using default IP address
if its not work you can just reset to factory setting

If the IAG's managed port (ETH 1) is disabled and no IP address is assigned, accessing the Web UI might prove challenging. You may need to resort to manual methods such as physically connecting to the device and re-enabling the port or using a console cable to access the device's command-line interface to configure the port and assign an IP address. Alternatively, if there's a DHCP server on the network, enabling the port and configuring it to obtain an IP address automatically might also be an option. Once the port is enabled and configured, accessing the Web UI should be possible using the newly assigned IP address.

Access management systems like IAG control access to web resources and provide secure network access using authentication management, policy-based authorization, audit and reporting services and single sign-on convenience among many other vital features.