Client constantly tries to conenct to port 21114/tcp
Author: thenktorCreated Nov 19, 2025Updated Jul 20, 2026
Labelsbug
Describe the bug The clients sonstantly try to connect to port 21114/tcp on the server. The server is the open source version and does not respond on this port. Furthermore this port is closed (dropping packets) in the server firewall because it is not used. This leads to a lot of tcp retransmissions.
Describe the environment
- Install environment: package
- If package, we need the distribution and release: FreeBSD 14.3
- server 1.1.14, client 1.4.3
How to Reproduce the bug Steps to reproduce the behavior:
- install open source server
- conenct client
- see endless connection attempts
Expected behavior On an open source server the client should not try to connect to port 21114 or the server should respond with a "here is nothing" message that stops connection attempts from the client.
Source: rustdesk/rustdesk-server