search for: if_isp1

...packets going out with the wrong address. So if I use tcrules to cause all traffic to use one provider, I necessarily have to masq the firewall generated outgoing traffic when a packet goes out an ISP link, but has the other ISP source IP. I put in masq two rows like this: INTERFACE SOURCE ADDRESS $IF_ISP1 $ISP2_IP $ISP1_IP $IF_ISP2 $ISP1_IP $ISP2_IP Exactly the same issue happens when you use tcrules to direct a particular application through either one of the ISP, and the solution is the same. This problem does not exist if you use rtrules instead of tcrules to direct traffic to one of the provide...