Antivirus Scanner
When File Inspection is enabled, an antivirus scanner attempts to scan all files.
The system begins streaming large files from the proxy to the user after scanning up to 50 MB to ensure that the user starts receiving the download while scanning continues in the background. If a file is identified as malicious, the connection is immediately terminated. For larger files, the user may initially experience a brief lag, but should still receive the entire file as quickly as normal—unless it's malicious.
Secure Access blocks downloads if there is a scanning error or the file is found to be corrupt. Once virus scanning is complete, the file is either delivered or the connection is terminated.
Antivirus scanner file limitations
Secure Access antivirus scanner:
- Scans only the first 50 MB of a file and does not scan any content of files greater than 50 MB in size.
- Decompresses and scans archives (such as .zip or .rar files) to a maximum of 16 levels of recursion, and blocks files compressed above 16 levels of recursion.
- Cannot decompress and scan a password-protected archive as the file cannot be decompressed without a password. Secure Access can block a password-protected archive under the scanner's Protected Archive category.