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The External Filters tab allows you to configure IceWarp Server to use any external filter(s) that support command-line scanning.
IceWarp Server Instant AntiSpam allows two typical ways of external AntiVirus usage -
/examples/libraryexternalav.txt.html that is delivered with standard installation of IceWarp Server.NOTE that if you choose to use any external on-access AntiVirus scanner you should exclude the <InstallDirectory>\Temp folder from the scanning as this could cause severe server slowdown and problems with IceWarp Server itself.
Check the Enable external AntiVirus box to enable this feature.
The Delete button will delete any selected filter.
The Add and Edit button allows you to define or modify an external filter. The External Filter dialog is opened:
Field |
Description |
Application |
Specify the fully qualified path to the external filter. Use the '...' button to open a standard file browser dialog. |
Type |
Select the type of module you are calling: Executable Choose this for a standard executable module. StdCall Library, Cdecl Library Choose this to call the filter from a library. Please refer to example file |
Parameters |
Here you should specify any parameters required by the external filter. Refer to your filter's documentation for further information. |
Use return value |
Enter values here that your external filter returns if a virus is found. Refer to your filters documentation for this information. Multiple values should be separated by commas. For example, if your filter returns a value from 1 to 5 if a virus is found you should specify 1,2,3,4,5 here. |
Check for file deletion |
Some filters do not return a value, but simply delete the file. If your filter behaves in this manner you should select this option. After the filter is run IceWarp Server will check whether the file has been deleted and, if it has, will treat the message as if it contains a virus. |