• One key deployment
  • In the command line interface, copy the following script to the new script file
  • Execute the script
  • test

NAT Protocol analysis

#!/bin/bash
#  The first level 
cat > /home/headless/Desktop/workspace/myshixun/message-1.txt << EOF  client IP：192.168.1.100  Source IP And port ：192.168.1.100;4335  Purpose IP And port ：64.233.169.104;80  from Google The server receives the corresponding status code  200、 state OK Of HTTP Time to respond to the message ：7.158797s  Carry status code 200、 state OK Of HTTP In response to the message IP Source on datagram IP Address and port ：64.233.169.104;80  Carry status code 200、 state OK Of HTTP In response to the message IP The purpose of the datagram IP Address and port ：192.168.1.100;4335 EOF

#  The second level 
cat > /home/headless/Desktop/workspace/myshixun/message-2.txt << EOF  The news appears in NAT_ISP_side The time to track the file is ：6.069168s  Host this  HTTP GET  News  IP  The source of the datagram IP And the ports are ：71.192.34.104;4335  Host this  HTTP GET  News  IP  The purpose of the datagram IP And the ports are ：64.233.169.104;80  Compare two trace files ,HTTP GET  Whether any fields in the message have changed ： no  EOF

DHCP Protocol analysis

#!/bin/bash
#  The first level 
cat > /home/headless/Desktop/workspace/myshixun/message-1.txt <<EOF DHCP The message is through UDP still TCP Sent ：UDP DHCP Find out ,DHCP Provide ,DHCP Request and DHCP ACK Of Transaction-ID What are the values ？ DHCP Find out ：0x3e5e0ce3 DHCP Provide ：0x3e5e0ce3 DHCP request ：0x3e5e0ce3 DHCP ACK：0x3e5e0ce3  The link layer address of the host ：00:08:74:4f:36:23 EOF

#  The second level 
cat > /home/headless/Desktop/workspace/myshixun/message-2.txt <<EOF  This machine DHCP The server IP The address is ：192.168.1.1 IP How long is the lease ( Company s)：86400s EOF

 All of the above are original , If unknown or wrong , Please point out .