18.3 连接建立的超时
dst host 192.168.137.2 and dst port 22
16:42:29.062800 IP node2.45592 > 1.1.2.2.discard: Flags [S], seq 1170865692, win 14600, options [mss 1460,sackOK,TS val 30501499 ecr 0,nop,wscale 7], length 0
16:42:31.063822 IP node2.45592 > 1.1.2.2.discard: Flags [S], seq 1170865692, win 14600, options [mss 1460,sackOK,TS val 30503501 ecr 0,nop,wscale 7], length 0
16:42:35.064462 IP node2.45592 > 1.1.2.2.discard: Flags [S], seq 1170865692, win 14600, options [mss 1460,sackOK,TS val 30507501 ecr 0,nop,wscale 7], length 0
16:42:43.064629 IP node2.45592 > 1.1.2.2.discard: Flags [S], seq 1170865692, win 14600, options [mss 1460,sackOK,TS val 30515501 ecr 0,nop,wscale 7], length 0
16:42:59.064855 IP node2.45592 > 1.1.2.2.discard: Flags [S], seq 1170865692, win 14600, options [mss 1460,sackOK,TS val 30531502 ecr 0,nop,wscale 7], length 0
16:44:32.630259 IP node2.45593 > 1.1.2.2.discard: Flags [S], seq 1881426060, win 14600, options [mss 1460,sackOK,TS val 30625067 ecr 0,nop,wscale 7], length 0
16:44:34.630642 IP node2.45593 > 1.1.2.2.discard: Flags [S], seq 1881426060, win 14600, options [mss 1460,sackOK,TS val 30627067 ecr 0,nop,wscale 7], length 0
16:44:38.630122 IP node2.45593 > 1.1.2.2.discard: Flags [S], seq 1881426060, win 14600, options [mss 1460,sackOK,TS val 30631067 ecr 0,nop,wscale 7], length 0
16:44:46.630355 IP node2.45593 > 1.1.2.2.discard: Flags [S], seq 1881426060, win 14600, options [mss 1460,sackOK,TS val 30639067 ecr 0,nop,wscale 7], length 0
16:45:02.630381 IP node2.45593 > 1.1.2.2.discard: Flags [S], seq 1881426060, win 14600, options [mss 1460,sackOK,TS val 30655067 ecr 0,nop,wscale 7], length 0
16:49:41.566288 IP node2.45595 > 1.1.2.2.discard: Flags [S], seq 1560843898, win 14600, options [mss 1460,sackOK,TS val 30934003 ecr 0,nop,wscale 7], length 0
16:49:43.566779 IP node2.45595 > 1.1.2.2.discard: Flags [S], seq 1560843898, win 14600, options [mss 1460,sackOK,TS val 30936003 ecr 0,nop,wscale 7], length 0
16:49:47.567090 IP node2.45595 > 1.1.2.2.discard: Flags [S], seq 1560843898, win 14600, options [mss 1460,sackOK,TS val 30940004 ecr 0,nop,wscale 7], length 0
16:49:55.567407 IP node2.45595 > 1.1.2.2.discard: Flags [S], seq 1560843898, win 14600, options [mss 1460,sackOK,TS val 30948004 ecr 0,nop,wscale 7], length 0
16:50:11.568741 IP node2.45595 > 1.1.2.2.discard: Flags [S], seq 1560843898, win 14600, options [mss 1460,sackOK,TS val 30964005 ecr 0,nop,wscale 7], length 0
node2:/root#date;telnet 1.1.2.2 discard;date
Tue Feb 18 16:48:07 CST 2020
Trying 1.1.2.2...
telnet: connect to address 1.1.2.2: Connection timed out
Tue Feb 18 16:49:10 CST 2020