I've put together a Devil-Linux firewall (running in a DMZ) to be a complete front end for our Exchange server - it does anti-virus, spam and phishing filtering before passing on to Exchange. It also acts as a transparent proxy for Outlook Web Access, so there is no direct access between the Exchange server and connections coming in from and the internet.
It uses spamassissin, postfix, clamav and sagator on the email side and pound proxy for the web stuff. The box is an old P3 and just using a CD and floppy drive, no hard drive needed. It could also run off a USB stick, but I haven't tried that route. On Exchange we also run Trend Micro av/v and spam filtering as a second level of defense. Another option is to use a spam filtering service where your email is first sent to the service for classification and filtering and then resent to you. Not sure of these details but recall a presentation by a company called Frontbridge (I think they were bought by MS). Personally, I always prefer a home grown Linux based solution. Martin TekBudda wrote: > I figured the list has been a bit quiet lately so I thought I would stir > up some conversation, debate & maybe a bit of controversy. ;-) > > I know this will raise some hackles but this is a Windows Server 2003 > (Small Business) running Exchange 2003 and the clients are Outlook 2003. > I would like to find some that is cross-platform and open-source as > there is potential to move a Linux box or possible virtualized box into > the network in the future. We host the server there and our DNS records > are hosted eleswhere, so people are essentially e-mailing us directly. > > What I envision is something that traps the spam as it is coming into > the server and preferably moves it into a "Review" folder to make sure > we don't lose any ham. I would like something that is trainable and > possibly relies on multiple lists or multiple ways to classify and deal > with the spam. The filtering system in exchange is ok but like > everything else MS it is limited adn doesn't quite cut the mustard. > Also...I do have a couple mailboxes that are still active but are not > checked on the client side at this moment so no client-side flitering is > done on them. This means that they seem to attract more spam. > > A couple of products I have looked at are ASSP, SpamBayes and a couple > other ones whose names escape me at the moment. From the looks of it > the 2 above are POP3 proxies that seem to do what I want. I was also > thinking of using a client solutions like SpamPal in conjunction with > one of these on the client that might be able to catch stuff that was > missed. > > Is ther anyone who has experience with these or other solutions that > anyone could suggest? The AV solution we use is TrendMicro SMB product > so if something integrates with that...even better. > > If people would prefer to contact me off-list that is fine. > _______________________________________________ clug-talk mailing list [email protected] http://clug.ca/mailman/listinfo/clug-talk_clug.ca Mailing List Guidelines (http://clug.ca/ml_guidelines.php) **Please remove these lines when replying
