The ICAP service on Intelligent Virtual Execution - Server appliances can block RESPMOD requests received from ICAP clients. When ICAP blocking is enabled, detection of a potential threat causes the appliance to block the requested data and instead serve the client browser a HTTP comfort page.
The following example shows the HTTP comfort page response served by a Intelligent Virtual Execution - Server appliance acting as an ICAP server to a client browser:
Note
The ICAP service is disabled by default. Enabling the ICAP service does not automatically enable ICAP blocking mode. However, the ICAP blocking comfort page is enabled by default.
You can enable or disable ICAP blocking mode by using the Intelligent Virtual Execution - Server appliance CLI.
Enabling or disabling ICAP blocking mode using the CLI
icap-service block-mode enable no icap-service block-mode enable