fix(relay): Specify IP as Host rather than srflx

packages/relay/internal/common/common.go

@@ -53,7 +53,7 @@ func InitWebRTCAPI() error {
 
 	nat11IP := GetFlags().NAT11IP
 	if len(nat11IP) > 0 {
-		settingEngine.SetNAT1To1IPs([]string{nat11IP}, webrtc.ICECandidateTypeSrflx)
+		settingEngine.SetNAT1To1IPs([]string{nat11IP}, webrtc.ICECandidateTypeHost)
 		slog.Info("Using NAT 1:1 IP for WebRTC", "nat11_ip", nat11IP)
 	}
 

packages/relay/internal/common/flags.go

@@ -125,7 +125,7 @@ func getLocalIP() string {
 		return ""
 	}
 	for _, address := range addrs {
-		if ipnet, ok := address.(*net.IPNet); ok && !ipnet.IP.IsLoopback() {
+		if ipnet, ok := address.(*net.IPNet); ok && !ipnet.IP.IsLoopback() && !ipnet.IP.IsPrivate() && !ipnet.IP.IsUnspecified() {
 			if ipnet.IP.To4() != nil || ipnet.IP != nil {
 				return ipnet.IP.String()
 			}