[PR #3623] [client] Mark netbird data plane traffic to identify interface traffic correctly #18054

New Issue

saavagebueno · 2026-08-05T04:08:03-04:00

saavagebueno commented

2026-08-05 04:08:03 -04:00

Original Pull Request: https://github.com/netbirdio/netbird/pull/3623

State: closed
Merged: Yes

Describe your changes

This change enables site2site traffic flow support in kernel mode.

Packets in and out of the NetBird interface mark the associated connection with the respective fwmark (per direction).
This is then used to filter events from the conntrack socket and determine the conn direction.

Issue ticket number and link

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)
Extended the README / documentation, if necessary

**Original Pull Request:** https://github.com/netbirdio/netbird/pull/3623 **State:** closed **Merged:** Yes --- ## Describe your changes This change enables site2site traffic flow support in kernel mode. Packets in and out of the NetBird interface mark the associated connection with the respective fwmark (per direction). This is then used to filter events from the conntrack socket and determine the conn direction. ## Issue ticket number and link ### Checklist - [ ] Is it a bug fix - [ ] Is a typo/documentation fix - [x] Is a feature enhancement - [ ] It is a refactor - [ ] Created tests that fail without the change (if possible) - [ ] Extended the README / documentation, if necessary

saavagebueno added the pull-request label 2026-08-05 04:08:03 -04:00

saavagebueno closed this issue

2026-08-05 04:08:04 -04:00

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Reference: DYNR/netbird#18054