Ubuntu
gnome-remote-desktop package

RDP remote desktop connection stopped working using mstsc from windows 11. tcpdump on ubuntu shows SYN packet coming and RESET being responded but no connection is established

Bug #2033939 reported by BuZain
8
This bug affects 1 person
Affects Status Importance Assigned to Milestone
gnome-remote-desktop (Ubuntu)
New
Undecided
Unassigned

Bug Description

service was working until latest update of gnome-remote-desktop yesterday. managed to reproduce on daily build.

ProblemType: Bug
DistroRelease: Ubuntu 23.10
Package: gnome-remote-desktop 45~beta-1
ProcVersionSignature: Ubuntu 6.3.0-7.7-generic 6.3.5
Uname: Linux 6.3.0-7-generic x86_64
ApportVersion: 2.27.0-0ubuntu2
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Sat Sep 2 03:13:31 2023
InstallationDate: Installed on 2023-09-01 (0 days ago)
InstallationMedia: Ubuntu 23.10 "Mantic Minotaur" - Daily amd64 (20230901.1)
ProcEnviron:
 LANG=en_US.UTF-8
 PATH=(custom, no user)
 SHELL=/bin/bash
 TERM=xterm-256color
 XDG_RUNTIME_DIR=<set>
SourcePackage: gnome-remote-desktop
UpgradeStatus: No upgrade log present (probably fresh install)

Revision history for this message
BuZain (buzain) wrote :
summary: RDP remote desktop connection stopped working using mstsc from windows
11. tcpdump on ubuntu shows SYN packet coming and RESET being responded
- but no connection is esablished
+ but no connection is established
Revision history for this message
Tdom (tdom) wrote :

For what it's worth, I'm seeing the same behavior as the original post. MacOS 13.5.1. RDP-ing via MS Remote Desktop App (stable or beta versions) in to Ubuntu Mantic presents the same as mentioned. Same TCP response. Not clear if it's Ubuntu RDP or something else happening along the chain.

Revision history for this message
BuZain (buzain) wrote :

I figured it out. For some reason, gnome-remote-desktop listens on port 3390 instead of 3389. Connecting to port 3390 works after adding required firewall rule using ufw. Is there a way to revert back to the original port?

Revision history for this message
Tdom (tdom) wrote :

Confirming that the pivot to the alternate port, 3390 worked for me too. Not sure when, or how out of the box MS RDP app for MacOS suddenly stopped working. Looks like the port shift on Ubuntu was quite a while ago. Thanks for the diligence and the tip. Guessing this ticket can be closed now?

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