netbirdio/netbird · error

flush chain creation: %w

Error message

flush chain creation: %w

What it means

Error "flush chain creation: %w" thrown in netbirdio/netbird.

Source

Thrown at client/firewall/nftables/manager_linux.go:817

func (m *Manager) initNoTrackChains(table *nftables.Table) error {
	m.notrackOutputChain = m.rConn.AddChain(&nftables.Chain{
		Name:     chainNameRawOutput,
		Table:    table,
		Type:     nftables.ChainTypeFilter,
		Hooknum:  nftables.ChainHookOutput,
		Priority: nftables.ChainPriorityRaw,
	})

	m.notrackPreroutingChain = m.rConn.AddChain(&nftables.Chain{
		Name:     chainNameRawPrerouting,
		Table:    table,
		Type:     nftables.ChainTypeFilter,
		Hooknum:  nftables.ChainHookPrerouting,
		Priority: nftables.ChainPriorityRaw,
	})

	if err := m.rConn.Flush(); err != nil {
		return fmt.Errorf("flush chain creation: %w", err)
	}

	return nil
}

func (m *Manager) refreshNoTrackChains() error {
	chains, err := m.rConn.ListChainsOfTableFamily(nftables.TableFamilyIPv4)
	if err != nil {
		return fmt.Errorf("list chains: %w", err)
	}

	tableName := getTableName()
	for _, c := range chains {
		if c.Table.Name != tableName {
			continue
		}
		switch c.Name {
		case chainNameRawOutput:

View on GitHub (pinned to 93e97f4bf1)

When it happens

Trigger: Thrown at client/firewall/nftables/manager_linux.go:817 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of netbirdio/netbird@93e97f4bf1 (2026-08-16). Data as JSON: /api/errors/354c205aad045115. Report an issue: GitHub.