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今天出现了一个疑难杂症 网络链路 电信ISP--园区路由--我们的路由--服务器
服务器上ping 所以域名，dns解析正常，ping能通，telnet 80端口能通；但就是wget不到网页（所以网站）
--2014-06-22 13:19:35-- (try:11) http://cndns.com/
Connecting to cndns.com (cndns.com)|114.80.154.211|:80... connected.
HTTP request sent, awaiting response... Read error (Connection reset by peer) in headers.
Retrying.
但除了80以外的所以端口业务都是正常的，可以scp远程内容，也可以从5666端口上报数据
而且wget不是一直都down不到页面，偶尔又可以。
真判断不出哪儿问题
root@debian:/home/nagios# tcpdump -i br0 'host 114.80.154.211 and greater 76' -Ap -v -s10000
tcpdump: listening on br0, link-type EN10MB (Ethernet), capture size 10000 bytes
13:30:55.892113 IP (tos 0x0, ttl 64, id 35734, offset 0, flags [DF], proto TCP (6), length 165)
10.10.3.1.33911 > 114.80.154.211.http: Flags [P.], cksum 0x1ac6 (incorrect -> 0x63de), seq 3145852131:3145852244, ack 3687771719, win 14600, options [nop,nop,TS val 348221309 ecr 254432274], length 113
E.....@.@...
..rP...w.P.......G..9........
..o}.*T.GET / HTTP/1.1
User-Agent: Wget/1.13.4 (linux-gnu)
Accept: */*
Host: www.cndns.com
Connection: Keep-Alive
13:30:56.309469 IP (tos 0x0, ttl 64, id 35735, offset 0, flags [DF], proto TCP (6), length 165)
10.10.3.1.33911 > 114.80.154.211.http: Flags [P.], cksum 0x1ac6 (incorrect -> 0x6375), seq 0:113, ack 1, win 14600, options [nop,nop,TS val 348221414 ecr 254432274], length 113
E.....@.@...
..rP...w.P.......G..9........
..o..*T.GET / HTTP/1.1
User-Agent: Wget/1.13.4 (linux-gnu)
Accept: */*
Host: www.cndns.com
Connection: Keep-Alive
13:30:57.341987 IP (tos 0x0, ttl 64, id 43809, offset 0, flags [DF], proto TCP (6), length 165)
10.10.3.1.33913 > 114.80.154.211.http: Flags [P.], cksum 0x1ac6 (incorrect -> 0x602c), seq 3670793216:3670793329, ack 1194618415, win 14600, options [nop,nop,TS val 348221672 ecr 254432419], length 113
E....!@.@.u.
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发表于 2014-06-22 13:31
发表于 2014-06-23 16:56
