Hi Network engineers/ managers, I've been faced with a challenge on how to protect our internal network from threats outside with minimal cost, or none at all (at least for the software when using open source) Can anyone advise me what to use? Ive searched about, CISCO ASA, ISA 2003, SNORT,...
Does anyone have experience using UnTangle in their small business? Looking for a general overall security product with firewall, spam, filters, etc. Free or opensource most preferable.