G'Day
It is certainly feasable. Bear in mind that you should run SNORT in a CHROOT environment in this situation.
There are various CHROOT environments in /VAR... Copy one and place a SNORT distribution in it. If you have never dealt with CHROOT before you might have some fun, but it is feasable.
As far as I can tell, ASTARO is LINUX with configuration software that makes it into a firewall appliance. There is still bare LINUX underneith.
Darryl