Dell EqualLogic PS6210XS EqualLogic Group Manager Administrator s Guide PS Ser - Page 200

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 Configuration, and select the NAS cluster. 2. In the Activities panel, click Modify client properties. You can modify the following fields: • 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 configuration settings, you must manually modify the VIPs of each client network. 3. Click OK. The default client network configuration 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 files. If you have only one antivirus server, you cannot delete that server until you first disable NAS antivirus on all SMB shares. How NAS Antivirus Protects Data When an SMB share user (or program) requests a file from the NAS cluster, NAS antivirus passes the file to an antivirus server for scanning. If the file is virus free, NAS antivirus permits user access. NAS antivirus does not scan that file again, providing it remains unmodified since the last check. The scan operation is transparent to the file's user, subject to the availability of an antivirus server. If the antivirus server reports an infected file, the file is automatically quarantined. This action prevents the virus from contaminating other data files. Users see no indication that a file is infected. Instead: • A file deletion returns a system-specific file not found state for a missing file, depending on the user's client computer. • An access denial might be interpreted as a file-permission problem. At this point, only NAS cluster administrators can recover an uninfected version of the file, or access and process the infected file. To gain access to an infected file, you must connect to the SMB share through another share on which the NAS antivirus service is disabled. Otherwise, NAS antivirus recognizes the file as infected, and denies access. You might also access the file 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. 200 NAS Container Operations