On Wed, 16 Apr 2008, Corey wrote: > I just had an experience where my server was getting slammed with thousands > of concurrent pop3 requests. This went on for over an hour before it finally > ceased, at which point I was able to start cyrus again. > > Anyhow, what are some mechanisms to prevent this in the future? > > In the mean time, I'd like to know whether I can configure cyrus/pop3 to > listen only on a specific interface rather than on all interfaces on the > server, and if so - where do I configure that option? You can modify cyrus.conf to bind a service entry to a particular IP address, like so: imap cmd="imapd" listen="11.22.33.44:imap" prefork=1 maxchild=100 I don't think Cyrus has any mechanisms built-in to prevent a denial-of-service attack like you describe. You can limit the impact on your machine by specifying a maxchild setting for your pop3 service. Andy ---- Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
