<?php sleep(60); //为了便于分析测试,会根据测试进行调整 echo "www.1sucai.cn"; ?>
#tcpdump -n host 218.1.57.236 and port 80
20:36:50.792731 IP 218.1.57.236.43052 > 222.73.211.215.http: S 1520902589:1520902589(0) win 65535 20:36:50.792798 IP 222.73.211.215.http > 218.1.57.236.43052: S 290378256:290378256(0) ack 1520902590 win 5840 20:36:50.801629 IP 218.1.57.236.43052 > 222.73.211.215.http: . ack 1 win 3276820:36:50.801838 IP 218.1.57.236.43052 > 222.73.211.215.http: P 1:797(796) ack 1 win 32768 20:36:50.801843 IP 222.73.211.215.http > 218.1.57.236.43052: . ack 797 win 5920:37:50.803230 IP 222.73.211.215.http > 218.1.57.236.43052: P 1:287(286) ack 797 win 59 20:37:50.803289 IP 222.73.211.215.http > 218.1.57.236.43052: F 287:287(0) ack 797 win 59 20:37:50.893396 IP 218.1.57.236.43052 > 222.73.211.215.http: . ack 288 win 32625 20:37:50.894249 IP 218.1.57.236.43052 > 222.73.211.215.http: F 797:797(0) ack 288 win 32625 20:37:50.894252 IP 222.73.211.215.http > 218.1.57.236.43052: . ack 798 win 59
#tcpdump -n host 218.1.57.236 and port 80
21:38:05.471129 IP 218.1.57.236.54049 > 222.73.211.215.http: S 1669618600:1669618600(0) win 65535 21:38:05.471140 IP 222.73.211.215.http > 218.1.57.236.54049: S 4166993862:4166993862(0) ack 1669618601 win 5840 21:38:05.481731 IP 218.1.57.236.54049 > 222.73.211.215.http: . ack 1 win 32768 21:38:05.481976 IP 218.1.57.236.54049 > 222.73.211.215.http: P 1:797(796) ack 1 win 32768 21:38:05.481985 IP 222.73.211.215.http > 218.1.57.236.54049: . ack 797 win 59 21:38:07.483626 IP 222.73.211.215.http > 218.1.57.236.54049: P 1:326(325) ack 797 win 59 21:38:07.747614 IP 218.1.57.236.54049 > 222.73.211.215.http: . ack 326 win 32605 21:43:07.448454 IP 222.73.211.215.http > 218.1.57.236.54049: F 326:326(0) ack 797 win 59 21:43:07.560316 IP 218.1.57.236.54049 > 222.73.211.215.http: . ack 327 win 32605 21:43:11.759102 IP 218.1.57.236.54049 > 222.73.211.215.http: F 797:797(0) ack 327 win 32605 21:43:11.759111 IP 222.73.211.215.http > 218.1.57.236.54049: . ack 798 win 59
# tcpdump -n host 218.1.57.236 and port 80
22:43:57.102448 IP 218.1.57.236.49955 > 222.73.211.215.http: S 4009392741:4009392741(0) win 65535 22:43:57.102527 IP 222.73.211.215.http > 218.1.57.236.49955: S 4036426778:4036426778(0) ack 4009392742 win 5840 22:43:57.111337 IP 218.1.57.236.49955 > 222.73.211.215.http: . ack 1 win 3276822:43:57.111522 IP 218.1.57.236.49955 > 222.73.211.215.http: P 1:797(796) ack 1 win 32768 22:43:57.111530 IP 222.73.211.215.http > 218.1.57.236.49955: . ack 797 win 59 22:43:59.114663 IP 222.73.211.215.http > 218.1.57.236.49955: P 1:326(325) ack 797 win 59 22:43:59.350143 IP 218.1.57.236.49955 > 222.73.211.215.http: . ack 326 win 3260522:45:59.226102 IP 218.1.57.236.49955 > 222.73.211.215.http: P 1593:2389(796) ack 650 win 32443 22:45:59.226109 IP 222.73.211.215.http > 218.1.57.236.49955: . ack 2389 win 83 22:46:01.227187 IP 222.73.211.215.http > 218.1.57.236.49955: P 650:974(324) ack 2389 win 83 22:46:01.450364 IP 218.1.57.236.49955 > 222.73.211.215.http: . ack 974 win 3228122:47:57.377707 IP 218.1.57.236.49955 > 222.73.211.215.http: P 3185:3981(796) ack 1298 win 32119 22:47:57.377714 IP 222.73.211.215.http > 218.1.57.236.49955: . ack 3981 win 108 22:47:59.379496 IP 222.73.211.215.http > 218.1.57.236.49955: P 1298:1622(324) ack 3981 win 108 22:47:59.628964 IP 218.1.57.236.49955 > 222.73.211.215.http: . ack 1622 win 3276822:50:59.358537 IP 222.73.211.215.http > 218.1.57.236.49955: F 1622:1622(0) ack 3981 win 108 22:50:59.367911 IP 218.1.57.236.49955 > 222.73.211.215.http: . ack 1623 win 32768 22:50:59.686527 IP 218.1.57.236.49955 > 222.73.211.215.http: F 3981:3981(0) ack 1623 win 32768 22:50:59.686531 IP 222.73.211.215.http > 218.1.57.236.49955: . ack 3982 win 108
echo 1800 > /proc/sys/net/ipv4/tcp_keepalive_time echo 15 > /proc/sys/net/ipv4/tcp_keepalive_intvl echo 5 > /proc/sys/net/ipv4/tcp_keepalive_probes
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