Based on the packet capture above, it only shows "10.10.10.10/avscan" and it does not have "icap://" in the request. The error occurs because the request should contain "icap://" but EMC Isilon removes it.
As a workaround, you need to change the path:
- Under the ICAP server, click the Add server link.
- Enter the following path:
icap://<IP/hostname of scanner>/spfs-av
For example, icap://10.10.10.10/spfs-av.
