We have been recommending Interscan Viruswall from Trend Micro for our clients, for the last four years and more. This is a commercial product, with at least four listed resellers in India.
It filters Web, FTP traffic and SMTP traffic. It provides a Web proxy server which is Apache-derived (I think), and this one allows your users to access anon-FTP, HTTP, etc, with near-real-time virus checking. And it of course filters SMTP traffic. Its virus signature database needs to be downloaded periodically from their Website. We set things up usually to attempt this download automatically more than once a day; why take risks? Web access slows down when you apply an anti-virus filter. The perceived slowdown is more than the actual slowdown at the bits-and-bytes level. This is because there's no partial delivery of content to the browser. If the file type is suspect (e.g. word processor .doc file), it will first download the entire file while the browser merrily twirls. Then it will apply all its checks, and then deliver the whole thing to the browser in one shot. This is done for many file types, resulting in a perceived slowdown. Emails too take somewhat more time, depending on the volume of email traffic. None of the resellers, in our experience, have any clue about how to install it on Linux, though. One of them sent an engineer once to our client, saying that they'd "install" the software free of cost (we'd told the client we'd charge for installation). This engineer came to the client site, popped in the CD, ran an install program, which (like Oracle's installer) just copied the software from the CD to the disk, and left. :) We got paid for doing the real install, once the client realised that there's mo' to it than meets the eye. :) Installation of this anti-virus software on Linux is an interesting experience, because it usually involves two copies of Sendmail. One copy receives the incoming email and passes it to the anti-virus software. (No, Interscan Viruswall does not know how to use milters.) After checking and cleaning, the mail is handed over to the second copy of Sendmail for actual forwarding and delivery. The engineer from this reseller company probably had never seen a Sendmail.cf in his life; his view of "install"-ing is only to be expected. Licence fees are of the order of Rs.1,500 per user for small numbers of users. You can negotiate, and bulk rates can come down to perhaps one-third of this figure. Shuvam On Fri, 22 Aug 2003, amit sharma wrote: > go for nai + amavis. > > amit > > --- yogesh anand <[EMAIL PROTECTED]> wrote: > > > > Dear Members, > > > > Plz suggest me the best and robust anti virus for > > linux sendmail mail server.I am running red hat > > linux > > 7.1 on server.If you could give me the details of > > pricing and licensing scheme,it would be a great > > help. > > > > With Regards > > Yogesh Anand > > > > __________________________________ > > Do you Yahoo!? > > Yahoo! SiteBuilder - Free, easy-to-use web site > > design software > > http://sitebuilder.yahoo.com > > > > _______________________________________________ > > ilugd mailing list > > [EMAIL PROTECTED] > > http://frodo.hserus.net/mailman/listinfo/ilugd > > > __________________________________ > Do you Yahoo!? > Yahoo! SiteBuilder - Free, easy-to-use web site design software > http://sitebuilder.yahoo.com > > _______________________________________________ ilugd mailing list [EMAIL PROTECTED] http://frodo.hserus.net/mailman/listinfo/ilugd
