Need advice on a internet/gateway/firewall set-up

[Thomas Fischer]

Hey all,

I need some advise on the best type of set-up under Fedora including 
configuration examples to build a «dual-homing» gateway/firewall.

The idea is to have the following set-up

    internet_ip_1                  internet_ip_2
          |                                       |
          |                                       |
          ------fedora_gateway-----
                         |
                   internal_network

So that is the network configuration, which will be put into place using 
3 physical ethernet cards. I am thinking of bonding the 2 internet 
facing ethernet cards but not sure how that would work with the 2 
internet ip addresses.

Any suggestions? How would I load balance the access across both networks?

Thanks for the help