Spam & Virus Filtering
About 99.8% of all computer virus infections come from e-mail. Our experience indicates that between one and two percent of all e-mail is infected.
The computer industry has developed two approaches to virus filtering: one at the PC level and one at the enterprise level.
PC-level protection requires that you install and maintain virus prevention software on every PC. The advantage of this solution is that it not only protects against e-mail infection but also infection from floppy disks, FTP files, etc. However, this approach can also be expensive and very difficult to maintain. The problem is keeping every PC updated. A user may opt to buy virus protection software but end up not keeping it up to date with the latest “signature files,” which describe new viruses.
The second approach is to install an enterprise e-mail filter, which looks at all of the e-mail going to one or more e-mail servers. WVNET is currently running this type of virus filtering.
An enterprise e-mail filter has the advantage that it can be maintained at one location, and it protects against the source of approximately 99.8% of all viruses. The virus filtering software we use has been recognized as one of the best available. We get updated virus signatures for any new viruses every hour. There is nothing wrong with using both approaches (i.e., both desktop and enterprise filtering). In fact, many experts recommend that you do this for those administrative PCs over which you have greater control.
The enterprise e-mail filter provided by WVNET protects an institution/agency from external virus infection. We currently use three separate virus scanners to help ensure no infected mail messages get through. It does not protect against infection of one internal user by another internal user. To protect against this type of problem requires the redirecting of internal mail to WVNET for filtering. If you are interested in this additional level of protection, WVNET staff can discuss the pros and cons with you.