faq_size_of_decompressed_file
For compressed files, how can I calculate the "x" value and use it effectively for the option "Size of decompressed file is "x" times the size of compressed file"?
This function prevents ScanMail from scanning a compressed file that might cause a Denial-of-Service (DoS) attack. A DoS attack happens when a mail server's resources are overwhelmed by unnecessary tasks. Preventing ScanMail from scanning files that decompress into very large files helps prevent this problem from happening.
Example: For the table below, the "x" value is 100
|
Decompressed file examples |
|
File size (not compressed) |
File size (compressed) |
Result |
|
500 KB |
10 KB (ratio is 50:1) |
Scanned |
|
1000 KB |
10 KB (ratio is 100:1) |
Scanned |
|
1001 KB |
10 KB (ratio is 100.1:1) |
Not scanned * |
|
2000 KB |
10 KB (ratio is 200:1) |
Not scanned * |
* ScanMail takes the action you configure for unscannable files.