Failed to connect to abc.com:21116 #3494

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opened 2026-02-21 01:24:38 -05:00 by deekerman · 1 comment

deekerman commented

2026-02-21 01:24:38 -05:00

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Originally created by @btdan on GitHub (Jun 13, 2025).

Bug Description

I set up hbbr/hbbs on ubuntu24.04 LTS system.
And the result of the command : netstat -nlp |grep hbb is as follows :
tcp 0 0 0.0.0.0:21115 0.0.0.0:* LISTEN 988/hbbs
tcp 0 0 0.0.0.0:21117 0.0.0.0:* LISTEN 985/hbbr
tcp 0 0 0.0.0.0:21116 0.0.0.0:* LISTEN 988/hbbs
tcp 0 0 0.0.0.0:21119 0.0.0.0:* LISTEN 985/hbbr
tcp 0 0 0.0.0.0:21118 0.0.0.0:* LISTEN 988/hbbs
udp 0 0 0.0.0.0:21116 0.0.0.0:* 988/hbbs
udp 0 0 0.0.0.0:36463 0.0.0.0:* 988/hbbs

The rustdesk client failed to connect to the rustdesk server(for example: abc.com),and the result is as follows:

I use the command : telnet abc.com 21116 or 21115
the result is: telnet: Unable to connect to remote host: connection is refused.
but telnet abc.com 21117 or replace 21117 with 21118 or 21119, the connection is sucessful.

Can you tell me how to solve this problem?
Thanks very much.

How to Reproduce

I set up the rustdesk server. and use rustdesk client failed to connect to the rustdesk server.

Expected Behavior

I want to rustdesk client connect to rustdesk server abc.com 21116 sucessfully.

Operating system(s) on local (controlling) side and remote (controlled) side

Ubuntu24.04

RustDesk Version(s) on local (controlling) side and remote (controlled) side

1.4.0 1.4.0

Screenshots

Additional Context

No response

Originally created by @btdan on GitHub (Jun 13, 2025). ### Bug Description I set up hbbr/hbbs on ubuntu24.04 LTS system. And the result of the command : netstat -nlp |grep hbb is as follows : tcp 0 0 0.0.0.0:21115 0.0.0.0:* LISTEN 988/hbbs tcp 0 0 0.0.0.0:21117 0.0.0.0:* LISTEN 985/hbbr tcp 0 0 0.0.0.0:21116 0.0.0.0:* LISTEN 988/hbbs tcp 0 0 0.0.0.0:21119 0.0.0.0:* LISTEN 985/hbbr tcp 0 0 0.0.0.0:21118 0.0.0.0:* LISTEN 988/hbbs udp 0 0 0.0.0.0:21116 0.0.0.0:* 988/hbbs udp 0 0 0.0.0.0:36463 0.0.0.0:* 988/hbbs The rustdesk client failed to connect to the rustdesk server(for example: abc.com),and the result is as follows: ![Image](https://github.com/user-attachments/assets/2618702f-b8b3-4609-8009-0ff539f516d1) I use the command : telnet abc.com 21116 or 21115 the result is: telnet: Unable to connect to remote host: connection is refused. but telnet abc.com 21117 or replace 21117 with 21118 or 21119, the connection is sucessful. Can you tell me how to solve this problem? Thanks very much. ### How to Reproduce I set up the rustdesk server. and use rustdesk client failed to connect to the rustdesk server. ### Expected Behavior I want to rustdesk client connect to rustdesk server abc.com 21116 sucessfully. ### Operating system(s) on local (controlling) side and remote (controlled) side Ubuntu24.04 ### RustDesk Version(s) on local (controlling) side and remote (controlled) side 1.4.0 1.4.0 ### Screenshots ![Image](https://github.com/user-attachments/assets/d972c41c-6ec4-4db6-b1fe-93cfe2f1a92a) ### Additional Context _No response_