LuLu review
A focused outbound firewall for Mac users who want granular connection control.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
LuLu is a free, open-source macOS firewall from Objective-See Foundation. It monitors outgoing network connections and alerts when applications or processes create new activity. Users can allow or block traffic, apply rules to processes or remote endpoints, and maintain separate profiles for different rule and settings combinations. That makes LuLu a fit for advanced Mac users who want direct visibility into outbound network behavior rather than a broader antivirus suite.
Its strongest area is rule control. LuLu supports allow and block lists, temporary rules with expiration settings, and import and export for managing configurations. The built-in network monitor adds visibility into connections, while optional VirusTotal lookups can provide additional context from alerts. These features suit users who are comfortable deciding which applications and processes should communicate externally, including users who want different firewall configurations for separate situations.
LuLu’s narrow focus is also its main boundary. The published product description presents it as a macOS firewall, not a conventional antivirus product, and its stated role centers on unauthorized outgoing connections. It is therefore better suited to outbound control than to buyers seeking a full malware-scanning package or a broader set of security tools. Choose LuLu when configurable Mac firewall rules, open-source availability, and connection alerts are the priority; choose another product when conventional antivirus coverage is the primary requirement.
LuLu pros and cons
- Where it wins
- Blocks unauthorized outgoing connections and alerts on new activity
- Supports scoped, temporary, imported, and exported firewall rules
- Free, open source, with profiles and optional VirusTotal lookups
- Where it doesn't
- Focused on outbound traffic rather than conventional antivirus scanning
- macOS-only coverage limits its platform range
- Requires users to review alerts and manage connection rules
LuLu fact sheet, pricing and score →
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