求助：tcp rst不成功的原因

编程实现tcp rst阻断tcp链接，下面是我用tcpdump抓的包，明明已经收到了tcp rst包，但是为什么没有阻断这个tcp连接

04:51:18.920884 IP 192.168.8.206.jvclient > 192.168.8.209.http: S 3920581985:3920581985(0) win 65535 <mss 1460,nop,nop,sackOK>
04:51:18.920905 IP 192.168.8.209.http > 192.168.8.206.jvclient: S 1441956853:1441956853(0) ack 3920581986 win 5840 <mss 1460,nop,nop,sackOK>
04:51:18.921189 IP 192.168.8.206.jvclient > 192.168.8.209.http: . ack 1 win 65535
04:51:18.921394 IP 192.168.8.206.jvclient > 192.168.8.209.http: P 1:306(305) ack 1 win 65535
04:51:18.921415 IP 192.168.8.209.http > 192.168.8.206.jvclient: . ack 306 win 6432
04:51:18.921425 IP 192.168.8.206.jvclient > 192.168.8.209.http: R 306:306(0) ack 1 win 0
04:51:18.921581 IP 192.168.8.206.jvclient > 192.168.8.209.http: R 306:306(0) ack 1 win 0
04:51:18.922055 IP 192.168.8.209.http > 192.168.8.206.jvclient: . 1:1461(1460) ack 306 win 6432
04:51:18.922062 IP 192.168.8.209.http > 192.168.8.206.jvclient: . 1461:2921(1460) ack 306 win 6432
04:51:18.922461 IP 192.168.8.206.jvclient > 192.168.8.209.http: R 306:306(0) ack 1461 win 0
04:51:18.922582 IP 192.168.8.206.jvclient > 192.168.8.209.http: R 306:306(0) ack 2921 win 0
04:51:18.922746 IP 192.168.8.206.jvclient > 192.168.8.209.http: . ack 2921 win 65535
04:51:18.922756 IP 192.168.8.209.http > 192.168.8.206.jvclient: . 2921:4381(1460) ack 306 win 6432
04:51:18.922760 IP 192.168.8.209.http > 192.168.8.206.jvclient: FP 4381:5241(860) ack 306 win 6432
04:51:18.922763 IP 192.168.8.206.jvclient > 192.168.8.209.http: R 306:306(0) ack 2921 win 0
04:51:18.923155 IP 192.168.8.206.jvclient > 192.168.8.209.http: R 306:306(0) ack 4381 win 0
04:51:18.923158 IP 192.168.8.206.jvclient > 192.168.8.209.http: R 306:306(0) ack 5241 win 0
04:51:18.923340 IP 192.168.8.206.jvclient > 192.168.8.209.http: . ack 5242 win 65535
04:51:18.923346 IP 192.168.8.206.jvclient > 192.168.8.209.http: R 306:306(0) ack 5242 win 0
04:51:18.924057 IP 192.168.8.206.jvclient > 192.168.8.209.http: F 306:306(0) ack 5242 win 65535
04:51:18.924062 IP 192.168.8.209.http > 192.168.8.206.jvclient: . ack 307 win 6432
04:51:18.924074 IP 192.168.8.206.jvclient > 192.168.8.209.http: R 306:306(0) ack 5242 win 0
04:51:18.924221 IP 192.168.8.206.jvclient > 192.168.8.209.http: R 307:307(0) ack 5242 win 0

自己顶一下