I was able to balance my connection to two ISP using iproute2 advance routing, My proxy server has 3 NIC card, 1st to ISP1 the 2nd to ISP2 and the 3rd internal, now my question is how am i going to define to squid that there are two parent proxy, (proxy.ISP1 and proxy.ISP2) and how squid can access simultaneously to two proxy? thanks, Wennie