ICAP Error: An error occurred while performing an ICAP operation. Connection failure. Could not send data due to dropped connection by the ICAP server.
2 years ago
Originally Published: 2013-09-13
Article Number
000040090
Issue
ICAP Error: An error occurred while performing an ICAP operation. Connection failure. Could not send data due to dropped connection by the ICAP server.

Network capture shows that the ICAP server sent a reset (RST) to the proxy server

Resolution

Workaround
Starting with DLP 9.6 the ICAP server will abort the connection to the web proxy when the file size exceeds 50M

Notes
The maximum matched content size is 50M so larger files will not generate matched content. It is not recommended to go higher than 100M since memory limits of the ICAP will be exceeded.