我的电脑网络时有时无，神马情况啊？

[wanborj]

开始的时候还好：
ping: sendmsg: Network is unreachable
64 bytes from 119.75.218.45: icmp_req=626 ttl=52 time=42.7 ms
64 bytes from 119.75.218.45: icmp_req=627 ttl=52 time=39.9 ms
64 bytes from 119.75.218.45: icmp_req=628 ttl=52 time=39.5 ms
64 bytes from 119.75.218.45: icmp_req=629 ttl=52 time=39.4 ms
64 bytes from 119.75.218.45: icmp_req=630 ttl=52 time=39.6 ms
64 bytes from 119.75.218.45: icmp_req=631 ttl=52 time=39.8 ms
64 bytes from 119.75.218.45: icmp_req=632 ttl=52 time=39.8 ms
64 bytes from 119.75.218.45: icmp_req=633 ttl=52 time=39.8 ms
64 bytes from 119.75.218.45: icmp_req=634 ttl=52 time=41.1 ms
64 bytes from 119.75.218.45: icmp_req=635 ttl=52 time=39.9 ms
64 bytes from 119.75.218.45: icmp_req=636 ttl=52 time=40.0 ms
64 bytes from 119.75.218.45: icmp_req=637 ttl=52 time=39.4 ms
64 bytes from 119.75.218.45: icmp_req=638 ttl=52 time=39.9 ms
64 bytes from 119.75.218.45: icmp_req=639 ttl=52 time=39.8 ms
64 bytes from 119.75.218.45: icmp_req=640 ttl=52 time=39.8 ms
64 bytes from 119.75.218.45: icmp_req=641 ttl=52 time=39.9 ms
64 bytes from 119.75.218.45: icmp_req=642 ttl=52 time=39.7 ms
64 bytes from 119.75.218.45: icmp_req=643 ttl=52 time=39.5 ms
64 bytes from 119.75.218.45: icmp_req=644 ttl=52 time=39.8 ms
64 bytes from 119.75.218.45: icmp_req=645 ttl=52 time=45.6 ms
64 bytes from 119.75.218.45: icmp_req=646 ttl=52 time=50.6 ms
64 bytes from 119.75.218.45: icmp_req=647 ttl=52 time=39.9 ms
64 bytes from 119.75.218.45: icmp_req=648 ttl=52 time=42.8 ms
64 bytes from 119.75.218.45: icmp_req=649 ttl=52 time=39.8 ms
64 bytes from 119.75.218.45: icmp_req=650 ttl=52 time=39.9 ms
64 bytes from 119.75.218.45: icmp_req=651 ttl=52 time=39.7 ms
64 bytes from 119.75.218.45: icmp_req=652 ttl=52 time=39.8 ms
64 bytes from 119.75.218.45: icmp_req=653 ttl=52 time=39.8 ms
64 bytes from 119.75.218.45: icmp_req=654 ttl=52 time=39.8 ms
64 bytes from 119.75.218.45: icmp_req=655 ttl=52 time=39.8 ms
64 bytes from 119.75.218.45: icmp_req=656 ttl=52 time=39.9 ms
64 bytes from 119.75.218.45: icmp_req=657 ttl=52 time=40.0 ms
64 bytes from 119.75.218.45: icmp_req=658 ttl=52 time=39.5 ms
64 bytes from 119.75.218.45: icmp_req=659 ttl=52 time=40.0 ms
64 bytes from 119.75.218.45: icmp_req=660 ttl=52 time=40.5 ms
64 bytes from 119.75.218.45: icmp_req=661 ttl=52 time=39.9 ms
64 bytes from 119.75.218.45: icmp_req=662 ttl=52 time=39.9 ms
64 bytes from 119.75.218.45: icmp_req=663 ttl=52 time=39.7 ms
64 bytes from 119.75.218.45: icmp_req=664 ttl=52 time=39.6 ms
64 bytes from 119.75.218.45: icmp_req=665 ttl=52 time=39.5 ms
64 bytes from 119.75.218.45: icmp_req=666 ttl=52 time=40.0 ms
64 bytes from 119.75.218.45: icmp_req=667 ttl=52 time=39.9 ms
64 bytes from 119.75.218.45: icmp_req=668 ttl=52 time=40.0 ms
64 bytes from 119.75.218.45: icmp_req=669 ttl=52 time=39.7 ms
64 bytes from 119.75.218.45: icmp_req=670 ttl=52 time=40.0 ms
64 bytes from 119.75.218.45: icmp_req=671 ttl=52 time=39.7 ms
64 bytes from 119.75.218.45: icmp_req=672 ttl=52 time=39.5 ms
64 bytes from 119.75.218.45: icmp_req=673 ttl=52 time=39.9 ms
64 bytes from 119.75.218.45: icmp_req=674 ttl=52 time=39.9 ms
64 bytes from 119.75.218.45: icmp_req=675 ttl=52 time=39.6 ms
ping: sendmsg: Network is unreachable
ping: sendmsg: Network is unreachable
ping: sendmsg: Network is unreachable
ping: sendmsg: Network is unreachable
ping: sendmsg: Network is unreachable
From wanbo-Rev-1-0.local (169.254.203.228) icmp_seq=681 Destination Host Unreachable
From wanbo-Rev-1-0.local (169.254.203.228) icmp_seq=682 Destination Host Unreachable
From wanbo-Rev-1-0.local (169.254.203.228) icmp_seq=683 Destination Host Unreachable
From wanbo-Rev-1-0.local (169.254.203.228) icmp_seq=684 Destination Host Unreachable
From wanbo-Rev-1-0.local (169.254.203.228) icmp_seq=685 Destination Host Unreachable
From wanbo-Rev-1-0.local (169.254.203.228) icmp_seq=686 Destination Host Unreachable
From wanbo-Rev-1-0.local (169.254.203.228) icmp_seq=687 Destination Host Unreachable
From wanbo-Rev-1-0.local (169.254.203.228) icmp_seq=688 Destination Host Unreachable
From wanbo-Rev-1-0.local (169.254.203.228) icmp_seq=689 Destination Host Unreach
之后我按了auto eth0
又出现了
ping: sendmsg: Network is unreachable
64 bytes from 119.75.218.45: icmp_req=716 ttl=52 time=39.7 ms
64 bytes from 119.75.218.45: icmp_req=717 ttl=52 time=39.6 ms
64 bytes from 119.75.218.45: icmp_req=718 ttl=52 time=39.5 ms
64 bytes from 119.75.218.45: icmp_req=719 ttl=52 time=39.8 ms
64 bytes from 119.75.218.45: icmp_req=720 ttl=52 time=39.8 ms
64 bytes from 119.75.218.45: icmp_req=721 ttl=52 time=39.9 ms
64 bytes from 119.75.218.45: icmp_req=722 ttl=52 time=40.1 ms
64 bytes from 119.75.218.45: icmp_req=723 ttl=52 time=39.5 ms
64 bytes from 119.75.218.45: icmp_req=724 ttl=52 time=39.6 ms
64 bytes from 119.75.218.45: icmp_req=725 ttl=52 time=39.8 ms
64 bytes from 119.75.218.45: icmp_req=726 ttl=52 time=39.7 ms
64 bytes from 119.75.218.45: icmp_req=727 ttl=52 time=39.8 ms
64 bytes from 119.75.218.45: icmp_req=728 ttl=52 time=39.5 ms
64 bytes from 119.75.218.45: icmp_req=729 ttl=52 time=40.2 ms
很郁闷，一直只能维持这种方式上网，打魔兽的时候，寝室局域网里也会掉线。
求大神教导，到底是哪里有问题啊？我最近没有干过什么，更新都没有做！

[eexpress]

改下mtu试试。
剩下，可能dsn被污染？被强制断线？

[eexpress]

改下mtu试试。去掉ipv6也试试。
剩下，可能dsn被污染？被强制断线？

[qy117121]

神啊，那是dns污染

[wanborj]

我是新手，这个dns不懂什么，有什么具体的操作可以解决这个问题的吗？可以设置arp的防火墙吗？

[wanborj]

dns污染未解决啊！求救，啊！我上网了解了一下dns污染，但是那都是说，网页转到非正确ip的网页，我这种情况下没出现这种情况，只是网络维持不了多久就断开了！
找了好久没有找到解决办法，求救啊！

[wanborj]

改下mtu试试。去掉ipv6也试试。
剩下，可能dsn被污染？被强制断线？

该怎么解决这个纠结的问题啊？我没有连mentohust的时候玩局域网魔兽也会掉线啊！这也会和网络方面有关吗？具体该怎么解决呢？希望高手教导啊！谢谢了！

[lm789632]

神二连了

[lijiwe24]

貌似是网内有人上了方校长不让上的网站，被强制断网一段时间