Set route commands to route response packets to the assistant server

    For example:

       Assume 10.110.12.18 is the IP address of the assistant server and 
    10.110.12.15 is the MySQL client IP address. We set the following route 
    command to route all responses to the 10.110.12.15 to the assistant server.

       route add -host 10.110.12.15 gw 10.110.12.18

   ./intercept -F <filter> -i <device,> 
  
   Note that the filter format is the same as the pcap filter.
    
   For example:

      ./intercept -i eth0 -F 'tcp and src port 3306' -d

      intercept will capture response packets of the TCP based application which 
  listens on port 3306 from device eth0 

  a) set user password pair in conf/plugin.conf in the installion directory

    Format:
       user user1@password1,user2@password2,...,userN@passwordN;

    For example:
       user root@123456;    
    
  b) start tcpcopy
    ./tcpcopy -x localServerPort-targetServerIP:targetServerPort -s <intercept server,> 
  
    For example(assume 10.110.12.17 is the IP address of the target server):

      ./tcpcopy -x 3306-10.110.12.17:3306 -s 10.110.12.18 

      tcpcopy would capture MySQL packets(assume MySQL listens on 3306 port) on current 
  server, do the necessary modifications and send these packets to the target port 
  '3306' on '10.110.12.17'(the target MySQL), and connect 10.110.12.18 for asking 
  intercept to pass response packets to it.