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[client] Redirect dns forwarder port 5353 to new listening port 22054 (#4707)

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- Port dnat changes from https://github.com/netbirdio/netbird/pull/4015 (nftables/iptables/userspace)
  - For userspace: rewrite the original port to the target port
  - Remember original destination port in conntrack
  - Rewrite the source port back to the original port for replies
- Redirect incoming port 5353 to 22054 (tcp/udp)
- Revert port changes based on the network map received from management
- Adjust tracer to show NAT stages
This commit is contained in:
Viktor Liu
2025-10-28 15:12:53 +01:00
committed by GitHub
parent 4545ab9a52
commit 404cab90ba
25 changed files with 1125 additions and 196 deletions
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10
client/firewall/manager/firewall.go
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@@ -151,14 +151,20 @@ type Manager interface {
DisableRouting() error
// AddDNATRule adds a DNAT rule
// AddDNATRule adds outbound DNAT rule for forwarding external traffic to the NetBird network.
AddDNATRule(ForwardRule) (Rule, error)
// DeleteDNATRule deletes a DNAT rule
// DeleteDNATRule deletes the outbound DNAT rule.
DeleteDNATRule(Rule) error
// UpdateSet updates the set with the given prefixes
UpdateSet(hash Set, prefixes []netip.Prefix) error
// AddInboundDNAT adds an inbound DNAT rule redirecting traffic from NetBird peers to local services
AddInboundDNAT(localAddr netip.Addr, protocol Protocol, sourcePort, targetPort uint16) error
// RemoveInboundDNAT removes inbound DNAT rule
RemoveInboundDNAT(localAddr netip.Addr, protocol Protocol, sourcePort, targetPort uint16) error
}
func GenKey(format string, pair RouterPair) string {