Hi,

IronPort has two models S-Series for Web Filtering and C-Series for Anti-SPAM.

Each one has its own set of models depending on the amount of users.

I have personally deal with the Anti-SPAM model and works great.

It is not a Firewall in the strict meaning like an ASA, but you can have redundancy using a pair of units.

The bandwidth depends on the unit also.

Federico.