Conclusion: The Zywall 35 UTM is a capable Internet security appliance with unified threat management features for the small business. Its attractive price and easy configuration should make it a good alternative for those relying on desktop security only.
Pros: Good AV and signature-based intrusion detection system (IDS). Reasonable price. Easy installation and configuration.
Cons: IDS signature update sometimes unreliable. Spam and content filtering engines not from top-tier providers.