- Question:
   1. Where should i put the script, so that the script will run when WAN connection is up?

- I want my router to get WAN IP which start with 218 (218.xxx.xxx.xx)

- I wrote a pseudo-code for the script
   -Code:
             var1=`ifconfig ppp0 | grep 'addr:' | sed 's/.*addr:\([^ ]\{2,3\}\).*/\1/'`
             if ('$var1'=='218') ; then
                      if-down
                      if-up
   -Description: Keep redialing until get the IP which start with 218