title: apache works fine,but netstat show nothing about apache's port
body: <p>i run into a problem:my apache listening on port 80 works fine,i can access it throug the browser,and i see the log in this apache print info regarding to my access.----so i can guareentee i access the right server,and the server is working for me.and telnet xxxx 80 ,it is ok.(xxxx is my server ip)
  but when i use netstat -nap|grep 80,i can not see any thing. </p>
  
  <p>i suspect that the 80 port is somewhat sensitive so my system may screen it from the netstat tool.so i change http.conf by set the port to 81 and start my apache, it works fine but still with the netstat being fooled to not display the info about 81 port.</p>
  
  <p>any help? tks
  i guess i can get the right state by restarting my machine,but i do not want to do this,i just want to know why!</p>