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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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5
client/internal/netflow/logger/logger.go
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@@ -10,10 +10,10 @@ import (
"github.com/google/uuid"
log "github.com/sirupsen/logrus"
"github.com/netbirdio/netbird/client/internal/dnsfwd"
"github.com/netbirdio/netbird/client/internal/netflow/store"
"github.com/netbirdio/netbird/client/internal/netflow/types"
"github.com/netbirdio/netbird/client/internal/peer"
"github.com/netbirdio/netbird/dns"
)
type rcvChan chan *types.EventFields
@@ -138,7 +138,8 @@ func (l *Logger) UpdateConfig(dnsCollection, exitNodeCollection bool) {
func (l *Logger) shouldStore(event *types.EventFields, isExitNode bool) bool {
// check dns collection
if !l.dnsCollection.Load() && event.Protocol == types.UDP && (event.DestPort == 53 || event.DestPort == uint16(dnsfwd.ListenPort())) {
if !l.dnsCollection.Load() && event.Protocol == types.UDP &&
(event.DestPort == 53 || event.DestPort == dns.ForwarderClientPort || event.DestPort == dns.ForwarderServerPort) {
return false
}