yum groupinstall “X Window System”
yum groupinstall “GNOME Desktop”
yum search wireshark
yum install -y wireshark-gnome
yum install -y tcpdump
TCP是主机对主机层的传输控制协议,提供可靠的连接服务,采用三次握手确认建立一个连接:
位码即tcp标志位,有6种标示:SYN(synchronous建立联机) ACK(acknowledgement 确认) PSH(push传送) FIN(finish结束) RST(reset重置) URG(urgent紧急)Sequence number(顺序号码) Acknowledge number(确认号码)
tcpdump -i eth0 -w test001.cap
4.进行ip、端口、http头等的显示过滤