DUP!服务器内网不掉，外网掉！？？

shinyrose

近来服务器真是多灾多难，这个问题困扰我很久了．是受人攻击还是我们内部网络问题?遇到过这样问题的朋友请帮帮忙．这个问题基本上都是出现在晚上１２点以后．谢谢！
ping某一IP，有一段后面都带DUP．
64 bytes from xxx.xxx.xxx.xxx: icmp_seq=690 ttl=254 time=0.791 ms
64 bytes from xxx.xxx.xxx.xxx: icmp_seq=691 ttl=254 time=0.764 ms
64 bytes from xxx.xxx.xxx.xxx: icmp_seq=692 ttl=254 time=0.778 ms
64 bytes from xxx.xxx.xxx.xxx: icmp_seq=693 ttl=254 time=0.787 ms
64 bytes from xxx.xxx.xxx.xxx: icmp_seq=694 ttl=254 time=0.762 ms
64 bytes from xxx.xxx.xxx.xxx: icmp_seq=695 ttl=254 time=0.751 ms
64 bytes from xxx.xxx.xxx.xxx: icmp_seq=696 ttl=254 time=0.780 ms
64 bytes from xxx.xxx.xxx.xxx: icmp_seq=697 ttl=254 time=1.16 ms
64 bytes from xxx.xxx.xxx.xxx: icmp_seq=697 ttl=254 time=1.23 ms (DUP!)
64 bytes from xxx.xxx.xxx.xxx: icmp_seq=698 ttl=254 time=1.22 ms
64 bytes from xxx.xxx.xxx.xxx: icmp_seq=698 ttl=254 time=1.31 ms (DUP!)
64 bytes from xxx.xxx.xxx.xxx: icmp_seq=699 ttl=254 time=23.9 ms
64 bytes from xxx.xxx.xxx.xxx: icmp_seq=699 ttl=254 time=24.0 ms (DUP!)
64 bytes from xxx.xxx.xxx.xxx: icmp_seq=700 ttl=254 time=94.4 ms
64 bytes from xxx.xxx.xxx.xxx: icmp_seq=700 ttl=254 time=94.5 ms (DUP!)
64 bytes from xxx.xxx.xxx.xxx: icmp_seq=701 ttl=254 time=500 ms
64 bytes from xxx.xxx.xxx.xxx: icmp_seq=701 ttl=254 time=500 ms (DUP!)
64 bytes from xxx.xxx.xxx.xxx: icmp_seq=702 ttl=254 time=99.0 ms
64 bytes from xxx.xxx.xxx.xxx: icmp_seq=702 ttl=254 time=99.1 ms (DUP!)
64 bytes from xxx.xxx.xxx.xxx: icmp_seq=703 ttl=254 time=1.08 ms
64 bytes from xxx.xxx.xxx.xxx: icmp_seq=703 ttl=254 time=1.25 ms (DUP!)
64 bytes from xxx.xxx.xxx.xxx: icmp_seq=704 ttl=254 time=351 ms
64 bytes from xxx.xxx.xxx.xxx: icmp_seq=704 ttl=254 time=351 ms (DUP!)
64 bytes from xxx.xxx.xxx.xxx: icmp_seq=705 ttl=254 time=44.8 ms
64 bytes from xxx.xxx.xxx.xxx: icmp_seq=705 ttl=254 time=45.0 ms (DUP!)
64 bytes from xxx.xxx.xxx.xxx: icmp_seq=706 ttl=254 time=8.05 ms
64 bytes from xxx.xxx.xxx.xxx: icmp_seq=706 ttl=254 time=8.30 ms (DUP!)
64 bytes from xxx.xxx.xxx.xxx: icmp_seq=707 ttl=254 time=622 ms
64 bytes from xxx.xxx.xxx.xxx: icmp_seq=707 ttl=254 time=622 ms (DUP!)
64 bytes from xxx.xxx.xxx.xxx: icmp_seq=708 ttl=254 time=5.44 ms
64 bytes from xxx.xxx.xxx.xxx: icmp_seq=708 ttl=254 time=5.50 ms (DUP!)
64 bytes from xxx.xxx.xxx.xxx: icmp_seq=758 ttl=254 time=0.756 ms
64 bytes from xxx.xxx.xxx.xxx: icmp_seq=759 ttl=254 time=0.734 ms
64 bytes from xxx.xxx.xxx.xxx: icmp_seq=760 ttl=254 time=0.874 ms
64 bytes from xxx.xxx.xxx.xxx: icmp_seq=761 ttl=254 time=0.814 ms
64 bytes from xxx.xxx.xxx.xxx: icmp_seq=762 ttl=254 time=0.890 ms
64 bytes from xxx.xxx.xxx.xxx: icmp_seq=763 ttl=254 time=0.840 ms
64 bytes from xxx.xxx.xxx.xxx: icmp_seq=764 ttl=254 time=0.858 ms
64 bytes from xxx.xxx.xxx.xxx: icmp_seq=765 ttl=254 time=0.883 ms

:cry: :cry:

ceoguang

可以肯定的告诉你,绝对不是攻击.你抓包来看下知道了.622 ms的延时不是网络问题是什么问题?最近ARP变种闹得很凶,好好检查一下吧!