Vinay, this isn't a simple problem that can be applied to a standardf template. To get some info on balancing and sculpting lines, see http://lartc.org or http://linux-ip.net/html/linux-ip.html They have enough reference material to get you through the process. You also have to note something else. If the two ISP line aren't from the same ISP, there's no guarantee this'll work at all. The problem is that each set of IP addresses tied to your PC are pointed to by your ISP. If your ISP finds you sending sources packets from a network that isn't theirs, they have all the right in the world to block those packets. Both Sender/Receiver have to have the same address to make connections. Good luck.