POP / IMAP受到攻击的服务器:有哪些风险和如何保护?
从昨天(上午7点)开始,我们的POP服务器遭到了一次短暂的攻击:这是我在/var/log/mail.log中发现的: Mar 26 10:31:36 serv pop3d: LOGIN FAILED, user=monday, ip=[::ffff:91.121.**.***] Mar 26 10:31:41 serv pop3d: Disconnected, ip=[::ffff:91.121.**.***] Mar 26 10:31:41 serv pop3d: Connection, ip=[::ffff:91.121.**.***] Mar 26 10:31:41 serv pop3d: LOGIN FAILED, user=monica, ip=[::ffff:91.121.**.***] Mar 26 10:31:46 serv pop3d: Disconnected, ip=[::ffff:91.121.**.***] Mar 26 10:31:46 serv pop3d: Connection, ip=[::ffff:91.121.**.***] Mar 26 10:31:46 serv pop3d: LOGIN FAILED, user=monroe, […]