hiyou can put a router between the outside interface of pix and your lan and using policy routing.the second choice if you are runnung pix 6.3 software you can use the command route map with ospf.regards

the software drops the oldest partial connection. Alternatively, you can configure the software to drop a random connection. To set the drop mode, use the following command in global configuration mode:ip tcp intercept drop-mode {oldest | random}or ...