Need advice

Question

linux

Good day, gentlemen, I need advice from an experienced community.
The situation is as follows, there is an ubuntu 10.04 server (home, I’m not going to fence anything global), the only thing that there was a need to configure two providers, namely, there are a number of subnets that are absolutely free to me, and of course the rest of the Internet is paid.
I need the routing to be exactly destination based, i.e. if I'm going to look at the "free grid", the traffic is forwarded to one interface, if not, then to another interface. I am familiar with the concepts of routing, I do not ask you to configure it for yourself, I ask you to give advice, what is the best way to use it?
Thank you in advance.

Answer 1

routing has always been destination based. use man route