[PR #5706] [client] Add IPv6 routing, fake IPs, and DNS bind selection #23721

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saavagebueno · 2026-08-05T06:07:46-04:00

saavagebueno commented

2026-08-05 06:07:46 -04:00

Original Pull Request: https://github.com/netbirdio/netbird/pull/5706

State: closed
Merged: Yes

Describe your changes

Extend forwarder endpoint/ICMP/TCP/UDP handlers for IPv6 address formatting and dual-stack support
Add IPv6 fake IP allocation and mapping in fakeip package with tests
DNS upstream: bind per-interface/address instead of global, with platform-specific selection (Android, iOS, general)
Route manager: handle IPv6 prefixes in dynamic routes and DNS interceptor
Anonymizer: update IPv6 output formatting in tests
System route ops: add IPv6 loopback handling and forwarding checks on Linux

Stacked on #5688.

Issue ticket number and link

Stack

#5631
- #5675
  - #5686
    - #5687
      - #5688
        
        #5706 👈
        
        #5707
        
        [GH-ISSUE #2631] DUPLICATE, please delete! Can't enable SSH access: "Running SSH server is not permitted" #2632 (#5708)

Checklist

Is it a bug fix
Is a typo/documentation fix
Is a feature enhancement
It is a refactor
Created tests that fail without the change (if possible)

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Documentation

Select exactly one:

I added/updated documentation for this change
Documentation is not needed for this change (explain why)

Docs PR URL (required if "docs added" is checked)

Paste the PR link from https://github.com/netbirdio/docs here:

https://github.com/netbirdio/docs/pull/667

**Original Pull Request:** https://github.com/netbirdio/netbird/pull/5706 **State:** closed **Merged:** Yes --- ## Describe your changes - Extend forwarder endpoint/ICMP/TCP/UDP handlers for IPv6 address formatting and dual-stack support - Add IPv6 fake IP allocation and mapping in `fakeip` package with tests - DNS upstream: bind per-interface/address instead of global, with platform-specific selection (Android, iOS, general) - Route manager: handle IPv6 prefixes in dynamic routes and DNS interceptor - Anonymizer: update IPv6 output formatting in tests - System route ops: add IPv6 loopback handling and forwarding checks on Linux Stacked on #5688. ## Issue ticket number and link ## Stack - #5631 - #5675 - #5686 - #5687 - #5688 - #5706 :point_left: - #5707 - #5708 ### Checklist - [ ] Is it a bug fix - [ ] Is a typo/documentation fix - [x] Is a feature enhancement - [ ] It is a refactor - [x] Created tests that fail without the change (if possible) > By submitting this pull request, you confirm that you have read and agree to the terms of the [Contributor License Agreement](https://github.com/netbirdio/netbird/blob/main/CONTRIBUTOR_LICENSE_AGREEMENT.md). ## Documentation Select exactly one: - [x] I added/updated documentation for this change - [ ] Documentation is **not needed** for this change (explain why) ### Docs PR URL (required if "docs added" is checked) Paste the PR link from https://github.com/netbirdio/docs here: https://github.com/netbirdio/docs/pull/667

saavagebueno added the pull-request label 2026-08-05 06:07:46 -04:00

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Reference: DYNR/netbird#23721