调试代理服务器,一直难以访问51cto. 一开始是连接超时,或者网络不可达. 后来变成这样子了... ping 118.114.78.54 PING 118.114.78.54 (118.114.78.54) 56(84) bytes of data. From 221.237.185.109 icmp_seq=5 Time to live exceeded From 221.237.185.109 icmp_seq=6 Time to live exceeded From 221.237.185.109 icmp_seq=7 Time to live exceeded From 221.237.185.109 icmp_seq=8 Time to live exceeded From 221.237.185.109 icmp_seq=9 Time to live exceeded From 221.237.185.110 icmp_seq=10 Time to live exceeded From 221.237.185.109 icmp_seq=11 Time to live exceeded From 221.237.185.110 icmp_seq=12 Time to live exceeded From 221.237.185.110 icmp_seq=13 Time to live exceeded From 221.237.185.109 icmp_seq=14 Time to live exceeded From 221.237.185.109 icmp_seq=15 Time to live exceeded
MAC上的ping结果是 36 bytes from 120.196.0.209: Destination Net Unreachable Vr HL TOS Len ID Flg off TTL Pro cks Src Dst 4 5 74 5400 3a4e 0 0000 3c 01 bd14 192.168.1.100 118.144.78.54
Request timeout for icmp_seq 729 Request timeout for icmp_seq 730 Request timeout for icmp_seq 731 Request timeout for icmp_seq 732 Request timeout for icmp_seq 733 Request timeout for icmp_seq 734 Request timeout for icmp_seq 735 Request timeout for icmp_seq 736 Request timeout for icmp_seq 737 Request timeout for icmp_seq 738
周期循环,每隔数个请求出现一次
36 bytes from 120.196.0.209: Destination Net Unreachable Vr HL TOS Len ID Flg off TTL Pro cks Src Dst 4 5 74 5400 3a4e 0 0000 3c 01 bd14 192.168.1.100 118.144.78.54