Help about cisco asa5510

Hi to all
I'm new to work with cisco firewall and i have many doubts about it.
I have a cisco asa 5510 with antispam module , i want install it in my lan that already has a firewall . the new configuration of my lan (installing the new cisco asa 5510) will be :
Mylan ---- FIREWALL

---

CISCOASA ---INTERNET
To avoid double NAT would like to install the cisco in trasparent mode .
In this mode antispam module mounted on cisco is able to work?
What advantages I have with a firewall in trasparent mode?
thank very much !

Hi Giu,

Yes the CSS-SSM module will be able to work in transparant mode. You can use the modular policy framework to direct traffic to the SSM module.

Cheers
stefan

Thank very much Steavg !
did you know if ASDM work in transparent mode ?
thank !