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[PR #2747] [client] Exclude loopback from NAT #3478

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opened 2025-11-20 08:06:09 -05:00 by saavagebueno · 0 comments
saavagebueno commented 2025-11-20 08:06:09 -05:00
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Original Pull Request: https://github.com/netbirdio/netbird/pull/2747

State: closed
Merged: Yes

Describe your changes

This fixes an issue with the ebpf proxy port being changed by the nat rules

-A NETBIRD-RT-NAT -i wt0 ! -o lo -j MASQUERADE
-A NETBIRD-RT-NAT ! -i lo -o wt0 -j MASQUERADE

       chain netbird-rt-postrouting {
                type nat hook postrouting priority srcnat - 1; policy accept;
                iifname "wt0" oifname != "lo" counter packets 0 bytes 0 masquerade
                oifname "wt0" iifname != "lo" counter packets 0 bytes 0 masquerade
        }

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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/2747 **State:** closed **Merged:** Yes --- ## Describe your changes This fixes an issue with the ebpf proxy port being changed by the nat rules ``` -A NETBIRD-RT-NAT -i wt0 ! -o lo -j MASQUERADE -A NETBIRD-RT-NAT ! -i lo -o wt0 -j MASQUERADE ``` ``` chain netbird-rt-postrouting { type nat hook postrouting priority srcnat - 1; policy accept; iifname "wt0" oifname != "lo" counter packets 0 bytes 0 masquerade oifname "wt0" iifname != "lo" counter packets 0 bytes 0 masquerade } ``` ## Issue ticket number and link ### Checklist - [x] 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
saavagebueno added the pull-request label 2025-11-20 08:06:09 -05:00
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Reference: SVI/netbird#3478
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