postfix邮件服务器被攻击
centos系统
postfix邮件服务器被攻击
攻击者每10秒左右就发一封垃圾邮件(连接IP和发信邮件地址一直变)
以下log
Nov 10 10:27:20 FFFFFF postfix/smtpd[15617]: connect from 220-141-160-125.dynamic.hinet.net[220.141.160.125]
Nov 10 10:27:20 FFFFFF postfix/trivial-rewrite[15619]: warning: do not list domain xxxxxx123.net in BOTH mydestination and virtual_alias_domains
Nov 10 10:27:20 FFFFFF postfix/smtpd[15617]: warning: restriction `reject' after `check_relay_domains' is ignored
Nov 10 10:27:20 FFFFFF postfix/smtpd[15617]: NOQUEUE: reject: RCPT from 220-141-160-125.dynamic.hinet.net[220.141.160.125]: 550 5.1.1 <jondalyhold@xxxxxx123.net>: Recipient address rejected: User unknown in local recipient table; from=<KrystynaHillebrano6872@hinet.net> to=<jondalyhold@xxxxxx123.net> proto=ESMTP helo=<hinet.net>
占时把发给不存在的用户的邮件拒绝了,log里全是这些拒绝信息
收信用户名也一直变,这是DHA攻击?
有什么好办法解决这个问题,