There are a couple of ways to scan the IFS for Viruses. One is to use Trend Micro www.trendmicro.com. I think it more for Domino for iSeries though. The other is to use a PC or NT server with Norton’s or other flavor of antivirus. Map a drive to the IFS and scan the drive. This is the cheapest way, but not very fast.
At our shop we don’t scan the IFS for virus very often and use the second method I mentioned. Our reasons are, we already have Norton on each desktop and scan incoming email attachments too. The AS/400 is behind our DMZ. Only internal users can get access to the IFS. Having a third layer is overkill for us.
Hope this information helps.