Sophos Anti-Virus for DOS/Windows 3.1x PDF User Manual
Using Sophos Anti-Virus
This section describes how to use Sophos Anti-Virus to carry out on-demand scans. This is controlled from the command line. Sophos Anti-Virus can scan floppy disks, hard disks, network drives and memory. It is normal to check the hard disk first and then any suspect floppy disks.
Secure booting
Before running anti-virus software, it is essential to secure boot the computer from a write-protected, clean system floppy disk. Failure to do this
may result in some stealth viruses not being detected on disk. 1.Switch the computer off. Do not use ‘Ctrl’+‘Alt’+‘Delete’ because this is intercepted by some viruses. 2.Insert the write-protected system floppy disk into drive A:. Switch the computer on and let it boot from the floppy.
Checking file servers from a workstation
You can use Sophos Anti-Virus to check file server drives from a workstation. You must establish a network user with read rights before checking. Some viruses infect files at the moment of file open request to DOS. If the user performing the checking has write rights to all files, and such a virus is resident in memory, all files on the server will be infected after scanning the server.
Before running Sophos Anti-Virus, boot up and log into the server securely. The procedure depends on the server platform but must allow a supervisor to log in without executing any DOS programs located on the server. Scan server drives as follows:To scan server drives, change to the SWEEP directory and run Sophos
Anti-Virus. For example
C:
CD SWEEP
SWEEP<drive1><drive2>…<driven>
For example, to check drives F: and G:, enter
SWEEPF:G:
Most networks do not allow examination of the boot sectors of file servers. Furthermore, on most networks, some files (normally .SYS) are not readable and Sophos Anti-Virus reports an error when trying to open them. When scanning a file server drive, by default .SYS files are not scanned. Any other unreadable files can be excluded by quoting them, preceded by the exclusion operator, in the SWEEP.ARE file. For more information see section 2.5.
A quick way of finding unreadable files on the file server is to run Sophos Anti-Virus and note the name of any file(s) that could not be opened. There is no loss of security in not checking these, as they contain data and not…
Download Sophos Anti-Virus for DOS/Windows 3.1x PDF User Manual
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January 8, 2010 | Posted in Anti Viruses, Software
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