[SunHELP] Which firewall to use on Solairis 9 please?

[mud]

ok box (ss20 sol 9 latests patches) has a fresh install, i read the 
solaris 8 bible aka
bills readme for sol8 quite good reading
thanks bill..

I want to install a firewall on this puppy before putting it back in 
production.
*please note i am a novice firewall person keep that in mind
**providing website with a good readme for whatever firewall would be 
most useful

Suggestions welcome.
thanks