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我的服务器软件是postfix的最近外出流量老特别大,用sysstat -if 1查看out老在38KB/s,
tcpdump显示:
00:22:23.375896 IP freemx2.sinamail.sina.com.cn.smtp > mail.xxxx.com.54197: . ack 192720 win 17520
00:22:23.378536 IP freemx2.sinamail.sina.com.cn.smtp > mail.xxxx.com.54197: . ack 194180 win 16060
00:22:23.378546 IP bad-len 0
00:22:23.381493 IP freemx2.sinamail.sina.com.cn.smtp > mail.xxxx.com.54197: . ack 194180 win 17520 <nop,nop,sack 1 {195640:197100}>
00:22:23.381577 IP freemx2.sinamail.sina.com.cn.smtp > mail.xxxx.com.54197: . ack 194180 win 17520 <nop,nop,sack 1 {195640:198560}>
00:22:23.381584 IP mail.xxxx.com.54197 > freemx2.sinamail.sina.com.cn.smtp: . 198560:200020(1460) ack 1 win 65535
00:22:23.607895 IP mail.xxxx.com.54197 > freemx2.sinamail.sina.com.cn.smtp: . 194180:195640(1460)
回事什么问题?回事用户的病毒邮件引起的吗? |
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