>Actually i've downloaded an evaluation version of the Norton one... Norton
>AntiVirus 2.0 for Gateways...
also, mcafee has one, www.antivirus.has (trendmicro) has one. In my
informal monitoring of various mailing list comments, mcafee seems weakest,
norton and trend are both good, with perhaps trend being out front a
bit. I recommend you set up NAVIEG and learn how these pgms work and you
might find that NAVIEG is sufficient.
There are also 2 or 3 a-v content scanners for Linux and FreeBSD. Some are
free, but even when they are not, they are heckuva lot cheaper than the
commercial big boys.
> I plan to use it on a separated server dedicated to this.
Due to the CPU intensiveness and slowness of scanning content (vs the speed
of scanning just headers), a dedicated server is the only way to go for
anybody with several 1000 emails per day to scan. A dedicated content
scanner should be "SMTP mail relay". If the av content scanner machine
goes down, your mail flow is totally blocked, so I recommend that you NOT
set up the av content scanner on the Internet gateway but "inside", like this:
1. IMGate mail gateway (or two) for anti-spam with mail-abuse.org lookups,
DNS validations of sending servers, and global header filtering (inbound
and outbound).
IMGate users are finding that IMGate will reject between 5% and 10% of all
mail just for MAPS reasons, and even more if you want to get really
agressive with long pattern lists for header filtering and 3-way DNS
validations. Forwards all mail to:
2. anti-virus content scanner. SMTP relay style, capable of ETRN delivery,
if possible, for downstream mail servers at client sites. forwards to
3.a Imail machine
3.b downsteam mail servers at client sites
If 2. goes down, incoming mail is stored at 1. until 2. comes back on line.
It may be possible, when the av scanner machine is down, to have 1.
fallback and forward directly to 3.
Len
Please visit http://www.ipswitch.com/support/mailing-lists.html
to be removed from this list.
