User Guide

Understanding Common AntiVirus Agent (CAVA)
Common AntiVirus Agent (CAVA) provides an antivirus solution to clients using a NAS server. It uses an industry-standard SMB
protocol in a Microsoft Windows Server environment. CAVA uses third-party antivirus software to identify and eliminate known
viruses before they infect files on the storage system.
Antivirus software is important because the storage system is resistant to the invasion of viruses because of its architecture.
The NAS server runs data access in real-time using an embedded operating system. Third parties are unable to run programs
containing viruses on this operating system. Although the operating system software is resistant to viruses, Windows clients
that access the storage system require virus protection. Virus protection on clients reduces the chance that they will store an
infected file on the server, and protects them if they open an infected file. This antivirus solution consists of a combination of
the operating system software, CAVA agent, and a third-party antivirus engine. The CAVA software and a third-party antivirus
engine must be installed on a Windows Server in the domain.
For the CEE CAVA versions required by PowerStore see the PowerStore Release Notes. For additional information about
CAVA, which is part of Common Event Enabler (CEE), see Using the Common Event Enabler on Windows Platforms on https://
www.dell.com/support.
Enable Common AntiVirus Agent (CAVA)
You enable CAVA, and upload the CAVA configuration file when you want to add anti-virus protection to your SMB shares.
Prerequisites
To enable Antivirus scanning, you need to create a user in the Active Directory, and then give it permissions on the CAVA server
to perform scans.
Steps
1. From PowerStore Manager go to the Storage > NAS Servers > [nas server] > Security & Events > Antivirus tab.
2. If Disabled is on, slide the button to change to Enabled.
3. If you do not have a current CAVA configuration file available:
a. Click Retrieve Current Configuration.
b. Complete the CAVA configuration file template.
c. Upload the updated CAVA configuration file.
4. Click Enabled and Apply to enable Antivirus scanning.
Configurable AntiVirus parameters
The table below details the parameters that can be configured in the viruschecker.conf CAVA configuration file. You can
create the configuration file and then upload it to PowerStore.
Table 3. Antivirus parameters
Parameter Description Mandatory Example
addr=
Sets the IP addresses of the CAVA
server or servers.
Yes
addr=10.205.20.130
masks=
Configures the file extensions that will
be scanned.
Yes
masks=*.exe:*.docx:*.com
excl=
Lists file extensions that will be
excluded during the scan.
No
excl=pagefile.sys
maxsize=<n>
Integer. Sets the maximum file size for
files that will be checked. Files that
exceed this size are not checked.
No
maxsize=4294967290
surveyTime=<n>
Sets the time interval (in seconds)
used to scan all AV servers to see
if they are online or offline. If no AV
server answers, the shutdown process
No
surveyTime=600
Additional NAS Server Features 15