How can I route packet by service port?

[DuckSang Yoon <yoondark @ rose . oes . samsung . co . kr>]

Hello, everybody.
I'm using CISCO7000, CISCO2500, and I installed a firewall a month ago.
Let's say this firewall is located between A and B.

   B Host
  _ _ _ _                  |                     |
 (        )    ----------  |   application       |
( Internet )-/-| Router |--|     gateway         |
 (_ _ _ _ )    ----------  |  ------------       |
                           |--| Firewall |-------|         A Host
                           |  ------------       |       _ _ _ _ _ 
                           |                     |      (          )
                           |     <========>      |--/--(  Internal  )
                           |   General Packet    |     (  Network   )
                           |                     |      (_ _ _ _ _ )
                           |     ----------      |
                           |-----| Router |------|
                           |     ----------      |
                           |                     |
                           |    <=========>      | 
                              Specific Packet


I want to make it like this.
Usually, General packet go from A to B through firewall.
But specific packet go through just a router not firewall
from A to B (like oracle sql*net, smtp).
is there any routing solution to route packet by kind of
appllication(port number).
If you have some solution, please mail me.

Thanks in advance,
-- 
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SYSTEM
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