Linux Embedded Appliance Firewall Review
Sure off-the-shelf router / firewalls are cheap and easy to set up, but sometimes they just don't get the job done, especially for more sophisticated requirements. And "big iron" products will put too big a dent in most small business budgets. Fortunately there are Open Source alternatives. Jim Hubbard takes a detailed look at one that can do just about anything you'd want it to do, while leaving your wallet alone.