# LuLu v4.3.0 — Version 4.3.0

- Product: LuLu (https://whatsnew.fyi/product/lulu)
- Vendor: Objective-See
- Date: 2026-03-14
- Version: v4.3.0
- Original notes: https://github.com/objective-see/LuLu/releases/tag/v4.3.0
- Permalink: https://whatsnew.fyi/product/lulu/releases/v4.3.0
- Labels: Platforms: macOS

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

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- **changed** — Improved handling of related flows
- **added** — Add localhost filtering setting to allow disabling default allowance of all localhost traffic and enable rules for applications communicating with local services

🆕 You can now sponsor **LuLu**/**Objective-See Foundation**:

[![](https://img.shields.io/static/v1?label=Sponsor&message=%E2%9D%A4&logo=GitHub&color=%23fe8e86)](https://github.com/sponsors/objective-see)

##### LuLu v4.3.0

☑️ Improved handling of related flows (#816/#616) 
Mahalo @jhult 🙏🏽 

☑️ Localhost filtering (#809, #430, #371 #55)
By default, LuLu allows all localhost traffic. A new setting allows this behavior to be disabled, enabling rules for applications communicating with local services (e.g., a proxy).

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🔐 Disk Image Hash (`SHA256`):
LuLu_4.3.0.dmg: `F123F9B8D126FDFAFE17297040F54377AAD402CA5BD848D8080F33C436995BFD`