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About Gateway AntiVirus Scan Limits
In the Gateway AntiVirus settings, the Scan size limit controls the maximum size of files that can be scanned by Gateway AntiVirus. Gateway AntiVirus does not scan files larger than the configured scan size limit.
Scan Limits in Fireware OS v12.x
In Fireware v12.0.1 and higher, Gateway AntiVirus default and maximum scan size limits are based on the hardware capabilities of each Firebox model.
The default and maximum scan size limits changed in Fireware v12.0.1. When you upgrade Fireware OS, the Gateway AntiVirus Scan size limit does not automatically change to the new default. We recommend that you update the Scan size limit to the default value for your Firebox model, listed in the table below.
Minimum scan size for all models is 1 MB.
| Default Scan Size Limit |
Maximum Scan Size Limit | RAM | Device Model |
|---|---|---|---|
| 1 MB | 5 MB | 512 MB |
Firebox T10, T15, XTM 25, XTM 26 |
| 2 MB | 10 MB | 1 GB |
Firebox T30, T35, XTM 33, XTM 330, Firebox Cloud Small, FireboxV Small, XTMv Small |
| 5 MB | 20 MB | 2 GB |
Firebox T50, T55, T70, M200, XTM 515, XTM 525, XTM 535, XTM 545, XTM 810, XTM 820, XTM 830, XTM 830-F, Firebox Cloud Medium, FireboxV Medium, XTMv Medium |
| 10 MB | 20 MB | 4 GB or more | All other Firebox models |
In Fireware OS v12.0 Gateway AV does not use the configured Scan size limit. It uses a 5 MB or 10 MB scan limit, based on the available RAM.
The Scan size limit also controls the maximum size of files that APT Blocker sends the sandbox environment for analysis. APT Blocker can send files of up to 10 MB in size. If you set the Gateway AntiVirus scan limit higher than 10 MB, APT Blocker does not send files larger than 10 MB to the sandbox environment for analysis.
If you enable DLP and Gateway AV for the same proxy action, the larger configured scan limit is used for both services.
For information about how to set the scan limit, see Configure Gateway AntiVirus Actions.
Scan Limits in Fireware OS Version 11.x
Fireware v11.x supported partial file scanning and had lower default scan limits. For more information about Gateway AntiVirus scan limit settings and behavior in Fireware v11.x, see About Gateway AntiVirus Scan Limits in Fireware v11.12.4 Help.