what version of freebsd should i install for imgate? on your website you mention 4.3, but i see there are newer on the ftp site.
thanks, jim ----- Original Message ----- From: "Len Conrad" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, February 26, 2002 10:09 PM Subject: Re: [IMail Forum] dictionary attack - address harvesting? > > >It seems that i have several people attempting to send email to any possible > >user@mydomain ... it is really filling up my logs and surely slowing other > >things down. > > > >Is there a way to stop this? > > no. you can't stop the other end from sending you mail. > > If the rate of sending is great enough, you'll be DoS'ed. It could go on > for days or weeks, or months, the latterin one actual case I know of an > Imail system in TN. > > The best you can do is put IMGate out front, and hope that the attack is > coming from ip's that are in RBL servers. Even then, the rate of attack > could consume all the SMTPD processes on IMGate (I've seen an attack from > 1000's of open relays world-wide consume 400 SMTPD processes). > > If the attack is from a single ip, a small group of ipss, or subnets, you > could block at the ip level at your edge router. > > Len > > http://MenAndMice.com/DNS-training > http://BIND8NT.MEIway.com : ISC BIND for NT4 & W2K > http://IMGate.MEIway.com : Build free, hi-perf, anti-abuse mail gateways > > > Please visit http://www.ipswitch.com/support/mailing-lists.html > to be removed from this list. > > An Archive of this list is available at: > http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ > Please visit http://www.ipswitch.com/support/mailing-lists.html to be removed from this list. An Archive of this list is available at: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/
