From 4e8d6d08e237ac2197710a0a5089272ec9e7b688 Mon Sep 17 00:00:00 2001
From: rustdesk <info@rustdesk.com>
Date: Mon, 3 Nov 2025 13:03:19 +0800
Subject: [PATCH] fix https://github.com/rustdesk/rustdesk-server/issues/435

---
 src/relay_server.rs      | 1 +
 src/rendezvous_server.rs | 1 +
 2 files changed, 2 insertions(+)

diff --git a/src/relay_server.rs b/src/relay_server.rs
index c0f910e..0ec190a 100644
--- a/src/relay_server.rs
+++ b/src/relay_server.rs
@@ -428,6 +428,7 @@ async fn make_pair_(stream: impl StreamTrait, addr: SocketAddr, key: &str, limit
         if let Ok(msg_in) = RendezvousMessage::parse_from_bytes(&bytes) {
             if let Some(rendezvous_message::Union::RequestRelay(rf)) = msg_in.union {
                 if !key.is_empty() && rf.licence_key != key {
+                    log::warn!("Relay authentication failed from {} - invalid key", addr);
                     return;
                 }
                 if !rf.uuid.is_empty() {
diff --git a/src/rendezvous_server.rs b/src/rendezvous_server.rs
index 3fd1639..ff46dbe 100644
--- a/src/rendezvous_server.rs
+++ b/src/rendezvous_server.rs
@@ -680,6 +680,7 @@ impl RendezvousServer {
     ) -> ResultType<(RendezvousMessage, Option<SocketAddr>)> {
         let mut ph = ph;
         if !key.is_empty() && ph.licence_key != key {
+            log::warn!("Authentication failed from {} for peer {} - invalid key", addr, ph.id);
             let mut msg_out = RendezvousMessage::new();
             msg_out.set_punch_hole_response(PunchHoleResponse {
                 failure: punch_hole_response::Failure::LICENSE_MISMATCH.into(),