Re: [Dovecot] limiting the per-time connections from one single IP address

On Mon, 2008-07-28 at 17:23 +0200, suomi wrote:

Hi every we had a havy pop3 attach yesterday morning: about 400'000 connects in three hours from one single IP address within wandadoo.fr.

the easiest way, to protect the dovecot server against such attacks would be to limit the number of connections anyone can open from one single IP address to the server in a certain time.

It's available in 1.1:

# Maximum number of POP3 connections allowed for a user from each IP address. # NOTE: The username is compared case-sensitively. #mail_max_userip_connections = 3

Rick