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關(guān)于ADSL上網(wǎng)的問題 [復(fù)制鏈接]

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發(fā)表于 2006-03-09 11:14 |只看該作者 |倒序?yàn)g覽
我公司上網(wǎng)是電信的ADSL ，帶寬1M，以前一直都很正常，最近出現(xiàn)了嚴(yán)重的問題：訪問外網(wǎng)非常慢，經(jīng)常打不開，但是如果一旦連接成功那么在這個(gè)連接上的流量就很正常了，所有的機(jī)器都是這樣，但是如果下班了，網(wǎng)絡(luò)就正常了，我看了NAT（AS3）的下轉(zhuǎn)發(fā)列表，里面有大量的TCP連接沒有成功，都是發(fā)送出去了SYN_SENT包而沒有回應(yīng)，就是TCP 3次握手沒有完成，為什么會(huì)這樣呢，請(qǐng)幫我看看，謝謝！

下面是轉(zhuǎn)發(fā)列表里的部分內(nèi)容：
[root@adsl net]# cat ip_conntrack | grep 192.168.0.221
tcp      6 103 SYN_SENT src=192.168.0.221 dst=61.152.242.202 sport=2771 dport=80 [UNREPLIED] src=61.152.242.202 dst=58.33.152.186 sport=80 dport=2771 use=1
tcp      6 431999 ESTABLISHED src=192.168.0.221 dst=192.168.0.1 sport=1719 dport=22 src=192.168.0.1 dst=192.168.0.221 sport=22 dport=1719 use=1
tcp      6 104 SYN_SENT src=192.168.0.221 dst=207.46.78.109 sport=2784 dport=80 [UNREPLIED] src=207.46.78.109 dst=58.33.152.186 sport=80 dport=2784 use=1
tcp      6 104 SYN_SENT src=192.168.0.221 dst=207.46.78.94 sport=2778 dport=80 [UNREPLIED] src=207.46.78.94 dst=58.33.152.186 sport=80 dport=2778 use=1
udp      17 145 src=192.168.0.221 dst=219.133.41.28 sport=6009 dport=8000 src=219.133.41.28 dst=58.33.152.186 sport=8000 dport=6009 [ASSURED] use=1
tcp      6 431976 ESTABLISHED src=192.168.0.221 dst=207.46.78.94 sport=2777 dport=80 src=207.46.78.94 dst=58.33.152.186 sport=80 dport=2777 [ASSURED] use=1
tcp      6 118 SYN_SENT src=192.168.0.221 dst=207.46.78.109 sport=2798 dport=80 [UNREPLIED] src=207.46.78.109 dst=58.33.152.186 sport=80 dport=2798 use=1
tcp      6 68 TIME_WAIT src=192.168.0.221 dst=64.233.167.111 sport=2765 dport=995 src=64.233.167.111 dst=58.33.152.186 sport=995 dport=2765 [ASSURED] use=1
tcp      6 431988 ESTABLISHED src=192.168.0.221 dst=219.133.48.103 sport=2238 dport=443 src=219.133.48.103 dst=58.33.152.186 sport=443 dport=2238 [ASSURED] use=1
tcp      6 39 SYN_SENT src=192.168.0.221 dst=207.46.78.94 sport=2764 dport=80 [UNREPLIED] src=207.46.78.94 dst=58.33.152.186 sport=80 dport=2764 use=1
udp      17 11 src=192.168.0.221 dst=202.96.209.133 sport=1031 dport=53 [UNREPLIED] src=202.96.209.133 dst=58.33.152.186 sport=53 dport=1031 use=1
tcp      6 431984 ESTABLISHED src=192.168.0.221 dst=207.46.78.94 sport=2781 dport=80 src=207.46.78.94 dst=58.33.152.186 sport=80 dport=2781 [ASSURED] use=1
tcp      6 63 TIME_WAIT src=192.168.0.221 dst=61.172.198.143 sport=2766 dport=110 src=61.172.198.143 dst=58.33.152.186 sport=110 dport=2766 [ASSURED] use=1
tcp      6 431974 ESTABLISHED src=192.168.0.221 dst=207.46.78.94 sport=2770 dport=80 src=207.46.78.94 dst=58.33.152.186 sport=80 dport=2770 [ASSURED] use=1
udp      17 20 src=192.168.0.221 dst=192.168.0.255 sport=137 dport=137 [UNREPLIED] src=192.168.0.255 dst=192.168.0.221 sport=137 dport=137 use=1
tcp      6 0 TIME_WAIT src=192.168.0.221 dst=61.172.198.143 sport=2762 dport=110 src=61.172.198.143 dst=58.33.152.186 sport=110 dport=2762 [ASSURED] use=1
tcp      6 104 SYN_SENT src=192.168.0.221 dst=207.46.78.109 sport=2779 dport=80 [UNREPLIED] src=207.46.78.109 dst=58.33.152.186 sport=80 dport=2779 use=1
tcp      6 118 SYN_SENT src=192.168.0.221 dst=207.46.78.109 sport=2800 dport=80 [UNREPLIED] src=207.46.78.109 dst=58.33.152.186 sport=80 dport=2800 use=1
udp      17 12 src=192.168.0.221 dst=202.96.209.133 sport=3566 dport=53 [UNREPLIED] src=202.96.209.133 dst=58.33.152.186 sport=53 dport=3566 use=1
tcp      6 104 SYN_SENT src=192.168.0.221 dst=207.46.78.94 sport=2780 dport=80 [UNREPLIED] src=207.46.78.94 dst=58.33.152.186 sport=80 dport=2780 use=1
tcp      6 431976 ESTABLISHED src=192.168.0.221 dst=207.46.78.94 sport=2774 dport=80 src=207.46.78.94 dst=58.33.152.186 sport=80 dport=2774 [ASSURED] use=1
tcp      6 118 TIME_WAIT src=192.168.0.221 dst=61.152.242.202 sport=2797 dport=80 src=61.152.242.202 dst=58.33.152.186 sport=80 dport=2797 [ASSURED] use=1
tcp      6 431998 ESTABLISHED src=192.168.0.221 dst=207.46.78.109 sport=2785 dport=80 src=207.46.78.109 dst=58.33.152.186 sport=80 dport=2785 [ASSURED] use=1
tcp      6 431975 ESTABLISHED src=192.168.0.221 dst=207.46.78.94 sport=2768 dport=80 src=207.46.78.94 dst=58.33.152.186 sport=80 dport=2768 [ASSURED] use=1
tcp      6 104 SYN_SENT src=192.168.0.221 dst=207.46.78.94 sport=2791 dport=80 [UNREPLIED] src=207.46.78.94 dst=58.33.152.186 sport=80 dport=2791 use=1
udp      17 11 src=192.168.0.221 dst=202.96.209.6 sport=1031 dport=53 [UNREPLIED] src=202.96.209.6 dst=58.33.152.186 sport=53 dport=1031 use=1
tcp      6 428082 ESTABLISHED src=192.168.0.221 dst=207.46.2.31 sport=1724 dport=1863 src=207.46.2.31 dst=58.33.152.186 sport=1863 dport=1724 [ASSURED] use=1
tcp      6 104 SYN_SENT src=192.168.0.221 dst=207.46.78.94 sport=2789 dport=80 [UNREPLIED] src=207.46.78.94 dst=58.33.152.186 sport=80 dport=2789 use=1
tcp      6 104 SYN_SENT src=192.168.0.221 dst=207.46.78.94 sport=2793 dport=80 [UNREPLIED] src=207.46.78.94 dst=58.33.152.186 sport=80 dport=2793 use=1
tcp      6 429620 ESTABLISHED src=192.168.0.221 dst=192.168.0.1 sport=2624 dport=3000 src=192.168.0.1 dst=192.168.0.221 sport=3000 dport=2624 [ASSURED] use=1
tcp      6 431975 ESTABLISHED src=192.168.0.221 dst=207.46.78.94 sport=2769 dport=80 src=207.46.78.94 dst=58.33.152.186 sport=80 dport=2769 [ASSURED] use=1
tcp      6 104 SYN_SENT src=192.168.0.221 dst=207.46.78.94 sport=2792 dport=80 [UNREPLIED] src=207.46.78.94 dst=58.33.152.186 sport=80 dport=2792 use=1
tcp      6 104 SYN_SENT src=192.168.0.221 dst=207.46.78.94 sport=2794 dport=80 [UNREPLIED] src=207.46.78.94 dst=58.33.152.186 sport=80 dport=2794 use=1
tcp      6 116 TIME_WAIT src=192.168.0.221 dst=61.152.242.202 sport=2796 dport=80 src=61.152.242.202 dst=58.33.152.186 sport=80 dport=2796 [ASSURED] use=1
tcp      6 9 SYN_SENT src=192.168.0.221 dst=64.233.167.111 sport=2763 dport=995 [UNREPLIED] src=64.233.167.111 dst=58.33.152.186 sport=995 dport=2763 use=1
tcp      6 104 SYN_SENT src=192.168.0.221 dst=207.46.78.109 sport=2783 dport=80 [UNREPLIED] src=207.46.78.109 dst=58.33.152.186 sport=80 dport=2783 use=1
tcp      6 104 SYN_SENT src=192.168.0.221 dst=207.46.78.109 sport=2787 dport=80 [UNREPLIED] src=207.46.78.109 dst=58.33.152.186 sport=80 dport=2787 use=1
tcp      6 104 SYN_SENT src=192.168.0.221 dst=207.46.78.94 sport=2790 dport=80 [UNREPLIED] src=207.46.78.94 dst=58.33.152.186 sport=80 dport=2790 use=1
tcp      6 431999 ESTABLISHED src=192.168.0.221 dst=220.181.28.230 sport=1721 dport=443 src=220.181.28.230 dst=58.33.152.186 sport=443 dport=1721 [ASSURED] use=1
tcp      6 118 SYN_SENT src=192.168.0.221 dst=207.46.78.109 sport=2799 dport=80 [UNREPLIED] src=207.46.78.109 dst=58.33.152.186 sport=80 dport=2799 use=1
udp      17 178 src=192.168.0.221 dst=202.96.209.133 sport=1025 dport=53 src=202.96.209.133 dst=58.33.152.186 sport=53 dport=1025 [ASSURED] use=1
udp      17 12 src=192.168.0.221 dst=202.96.209.6 sport=3566 dport=53 [UNREPLIED] src=202.96.209.6 dst=58.33.152.186 sport=53 dport=3566 use=1
udp      17 179 src=192.168.0.221 dst=202.96.209.6 sport=1025 dport=53 src=202.96.209.6 dst=58.33.152.186 sport=53 dport=1025 [ASSURED] use=1
tcp      6 431998 ESTABLISHED src=192.168.0.221 dst=207.46.78.109 sport=2776 dport=80 src=207.46.78.109 dst=58.33.152.186 sport=80 dport=2776 [ASSURED] use=1
tcp      6 104 SYN_SENT src=192.168.0.221 dst=207.46.78.94 sport=2788 dport=80 [UNREPLIED] src=207.46.78.94 dst=58.33.152.186 sport=80 dport=2788 use=1
tcp      6 82 SYN_SENT src=192.168.0.221 dst=61.129.59.97 sport=3527 dport=5000 [UNREPLIED] src=61.129.59.97 dst=58.33.152.186 sport=5000 dport=3527 use=1
tcp      6 104 SYN_SENT src=192.168.0.221 dst=61.152.242.202 sport=2795 dport=80 [UNREPLIED] src=61.152.242.202 dst=58.33.152.186 sport=80 dport=2795 use=1
tcp      6 431998 ESTABLISHED src=192.168.0.221 dst=207.46.78.94 sport=2767 dport=80 src=207.46.78.94 dst=58.33.152.186 sport=80 dport=2767 [ASSURED] use=1
tcp      6 431988 ESTABLISHED src=192.168.0.221 dst=207.46.78.94 sport=2786 dport=80 src=207.46.78.94 dst=58.33.152.186 sport=80 dport=2786 [ASSURED] use=1

論壇徽章:
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2樓 [報(bào)告]
發(fā)表于 2006-03-09 15:52 |只看該作者
幫我看看，謝謝！

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3樓 [報(bào)告]
發(fā)表于 2006-03-09 17:11 |只看該作者
幫我看看，謝謝！

論壇徽章:
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4樓 [報(bào)告]
發(fā)表于 2006-03-09 20:40 |只看該作者
幫我看看，謝謝！

論壇徽章:
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5樓 [報(bào)告]
發(fā)表于 2006-03-10 11:12 |只看該作者
請(qǐng)幫我看看！謝謝！
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