Port fowarding and load balancer in ubuntu server 12.04

I am looking to create a load balancing server. Essentially here is what I want to do: I have a public IP address, lets say 1.1.1.1 I have a second public IP address, lets say 2.2.2.2. I have a website, www.f.com point to 1.1.1.1 via an A record. I want that Ubuntu server to forward traffic like this: - Port 80 traffic is forwarded to 2.2.2.2 on port 60,000 and port 60,001. - Port 443 traffic is forwaded to 2.2.2.2 on port 60,010 and port 60,011. - Port 25 traffic is forwared to 2.2.2.2 on port 60,020 and port 60,021 The port forwarding is more important then being able to load balance. I look forward to some responses. Both server 1.1.1.1 and 2.2.2.2 are both running Ubuntu 12.04 server edition.