The Lights-Out Management (LOM) on Citrix ADC's provides access to console of the Citrix ADC appliance. This uses Java Applet to get connected to the console.
To use this functionality, allow access to Virtual Network Computing VNC port TCP 5900 and IPMI port TCP 623 (with port 443 for https through web browsers) for LOM IP address on the firewall.
If these ports are not allowed, then console access through LOM will fail.
Citrix eDocs - Refer to Configure the network settings on the LOM port for information on how to access and configure LOM port.
Citrix Downloads - Refer to LOM Firmware Upgrade for information on LOM upgrade.