Administrator Guide

To cancel, click No.
Modifying Client Network Properties
Default values for gateway IP address, bonding mode, and MTU are shared among all the client networks for a NAS cluster.
Depending on the bonding mode selection, a message prompts you about the change in the number of virtual IP addresses for your
client networks and the need to change the virtual IP address settings for each client network to ensure that load balancing is
optimal. To modify the client network properties:
1. Click Group, expand Group Conguration, and select the NAS cluster.
2. In the Activities panel, click Modify client properties.
You can modify the following elds:
• Default gateway
• MTU size
• Bonding mode
NOTE: When you change the bonding mode of a client network, the optimal number of VIPs is changed. To retain
optimal conguration settings, you must manually modify the VIPs of each client network.
3. Click OK.
The default client network conguration is updated for each client network.
About NAS Antivirus Servers
You cannot actively determine the status of antivirus servers from within Group Manager. Therefore, you cannot know whether
antivirus servers are present and working. If no antivirus hosts are available, the following error message is logged to Group events:
No antivirus hosts are accessible. Virus scanning is not possible. SMB shares configured
with antivirus scan will not be accessible.
NAS antivirus allocates scanning operations to the antivirus servers to maximize the available scanning bandwidth. The fewer
available antivirus servers, the more time required to scan les.
If you have only one antivirus server, you cannot delete that server until you rst disable NAS antivirus on all SMB shares.
How NAS Antivirus Protects Data
When an SMB share user (or program) requests a le from the NAS cluster, NAS antivirus passes the le to an antivirus server for
scanning. If the le is virus free, NAS antivirus permits user access. NAS antivirus does not scan that le again, providing it remains
unmodied since the last check. The scan operation is transparent to the le’s user, subject to the availability of an antivirus server.
If the antivirus server reports an infected le, the le is automatically quarantined. This action prevents the virus from contaminating
other data les.
Users see no indication that a le is infected. Instead:
• A le deletion returns a system-specic file not found state for a missing le, depending on the user’s client computer.
• An access denial might be interpreted as a le-permission problem.
At this point, only NAS cluster administrators can recover an uninfected version of the le, or access and process the infected le.
To gain access to an infected le, you must connect to the SMB share through another share on which the NAS antivirus service is
disabled. Otherwise, NAS antivirus recognizes the le as infected, and denies access. You might also access the le through an NFS
export, because NFS does not support NAS antivirus.
NAS antivirus must be enabled to actively scan clusters or SMB shares. You can enable antivirus scans for a cluster or an SMB share
at any time.
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NAS Container Operations