用TCPDUMP捕获的TCP包的一般输出信息是: src > dst: flags data-seqno ack window urgent options src > dst:表明从源地址到目的地址, flags是TCP包中的标志信息,S 是SYN标志, F (F IN), P (PUSH) , R (RST) "." (没有标记); data-seqno是数据包中的数据的顺序号, ack是 下次期望的顺序号, ...
(Linux cooked), capture size 262144 bytes 06:55:31.984789 IP 192.168.240.133.46688 > zabbix.com.ssh: Flags [S], seq 2366362196, win 29200, options [mss 1460,sackOK,TS val 1636996 ecr 0,nop,wscale 7], length 0 06:55:31.984993 IP 192.168.240.133.46688 > zabbix.com.ssh: Flags [.]...
tcpdump 的输出解读 21:27:06.995846 IP (tos 0x0, ttl 64, id 45646, offset 0, flags [DF], proto TCP (6), length 64) 192.168.1.110.40411 > 192.168.1.123.80: Flags [S], cksum 0xa730 (correct), seq 992042666, win 65535, options [mss 1460,nop,wscale 4,nop,nop,TS val 663433143 ...
想获取172.16.10.11和google.com之间建立TCP三次握手中带有SYN标记位的网络包. 命令为:sudo tcpdump -i eth0 ‘host 172.16.0.11 andhostgoogle.comand tcp[tcpflags]&tcp-syn!=0’ -c 3 -nn
08:43:32.734619 IP 192.168.1.93.62148 > CentOS7-1.ssh: Flags [.], ack 1684, win 4104, length 0 抓取Ping数据包 [root@CentOS7-1 ~]# tcpdump -c 5 -nn -i ens33 icmp tcpdump: verbose output suppressed, use -v or -vv for full protocol decode ...
16:36:13.873456 IP (tos 0x10, ttl 64, id 121, offset 0, flags [DF], proto TCP (6), length 184) blog.ssh > 10.0.3.1.32855: Flags [P.], cksum 0x1ba1 (incorrect -> 0x0dfd), seq 2546458841:2546458973, ack 1824684869, win 355, options [nop,nop,TS val 621196643 ecr 621196379...
12:15:54.842641 IP (tos 0x0, ttl 64, id 19304, offset 0, flags [DF], proto TCP (6), length 40) 192.168.100.1.5788 > 192.168.100.62.22: tcp 0 0x0000: 000c 2908 9234 0050 56c0 0008 0800 4500 ..)..4.PV...E. 0x0010: 0028 4b68 4000 4006 a5d7 c0a8 6401 c0a8 .(Kh@....
src ＞ dst: flags data-seqno ack window urgent options src ＞ dst:表明从源地址到目的地址, flags是TCP包中的标志信息,S 是SYN标志, F (FIN), P (PUSH) , R (RST) "." (没有标记); data-seqno是数据包中的数据的顺序号, ack是 下次期望的顺序号, window是接收缓存的窗口大小, urgent表明数据...
11:53:21.447408 IP (tos 0x10, ttl 64, id 19328, offset 0, flags [DF], proto 6, length: 172) asptest.localdomain.ssh > 192.168.228.244.1858: P 168:300(132) ack 1 win 1266 <==按下[ctrl]-c之后结束 347 packets captured 1474 packets received by filter ...
[root@localhost ~]# tcpdump -i any -c1 -v dropped privs to tcpdump tcpdump: listening on any, link-type LINUX_SLL (Linux cooked), capture size 262144 bytes 19:41:00.606276 IP (tos 0x48, ttl 64, id 4249, offset 0, flags [DF], proto TCP (6), length 220) localhost.localdomain....