netbirdio/netbird · error

delete inbound DNAT rule: %w

Error message

delete inbound DNAT rule: %w

What it means

Error "delete inbound DNAT rule: %w" thrown in netbirdio/netbird.

Source

Thrown at client/firewall/iptables/router_linux.go:1033

		rule:  dnatRule,
	}

	if err := r.iptablesClient.Append(ruleInfo.table, ruleInfo.chain, ruleInfo.rule...); err != nil {
		return fmt.Errorf("add inbound DNAT rule: %w", err)
	}
	r.rules[ruleID] = ruleInfo.rule

	r.updateState()
	return nil
}

// RemoveInboundDNAT removes an inbound DNAT rule.
func (r *router) RemoveInboundDNAT(localAddr netip.Addr, protocol firewall.Protocol, originalPort, translatedPort uint16) error {
	ruleID := fmt.Sprintf("inbound-dnat-%s-%s-%d-%d", localAddr.String(), protocol, originalPort, translatedPort)

	if dnatRule, exists := r.rules[ruleID]; exists {
		if err := r.iptablesClient.Delete(tableNat, chainRTRDR, dnatRule...); err != nil {
			return fmt.Errorf("delete inbound DNAT rule: %w", err)
		}
		delete(r.rules, ruleID)
	}

	r.updateState()
	return nil
}

// ensureNATOutputChain lazily creates the OUTPUT NAT chain and jump rule on first use.
func (r *router) ensureNATOutputChain() error {
	if _, exists := r.rules[jumpNatOutput]; exists {
		return nil
	}

	chainExists, err := r.iptablesClient.ChainExists(tableNat, chainNATOutput)
	if err != nil {
		return fmt.Errorf("check chain %s: %w", chainNATOutput, err)
	}

View on GitHub (pinned to 93e97f4bf1)

When it happens

Trigger: Thrown at client/firewall/iptables/router_linux.go:1033 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/2bd9f892df12a49d. Report an issue: GitHub.