Security :: Ubuntu Remote Desktop Connection Breech?
Apr 27, 2010
I was working on my desktop under Ubuntu 9.10 when I got a message in the the upper right telling me that my Remote Desktop Connection had been activated. I don't know who it was, but they proceeded to open up a terminal and start typing a bunch of stuff. This scared the living @#$^ out of me, so I didn't really pay attention to what he was doing and immediately dove for the reset button. I disconnected my network from the web and found that RDC was NOT password protected.
Now, I probably did this a little while ago while I was playing around with it, but I also set up an account with dyndns.org. Would this possibly increase the number of attacks on my network? Just in case, I have removed my listing. Also, would any of this incident be logged somewhere? How/Where would I look to see if I'm being poked and prodded for another security hole?
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Jul 6, 2010
I always use VNC to check my server for updates, and this morning I started the xvnc4viewer to vnc into my server and it keep asking for a password. I never setup a password because I do this local from my laptop, and I am the only one who uses my laptop. I had to go to my server and check the setting in System > Preferences > Remote Desktop and found them all changed. There was a password setup and there was a check mark in the you must confirm each access to this machine there some security update that changed all these setting? Sometimes when I do updates I don't know what is being changed on my server
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Mar 24, 2010
So I've read a bit and it seems that this is okay and secure. But I wanted to double check here with everyone, because I trust here more than just about anywhere. I've read about the hipporemote (which is pretty cool) and I have it working. Basically I want to make sure my system is still secure.
1. I had to open a port on my firewall for the VNC connection.
2. I turned on the Remote Desktop
2a. Checked Allow other users to view....
2b. Checked Allow other users to control....
2c. Checked You must confirm.....
2d. Checked for password, and put in a password
2e. Checked Configure network automatically to accept connectios
So with doing all of that, am I ok? I think so, especially since it says its only accessible on my local network. But I just wanted to hear from people who know more than I do that I don't need to worry any more than normal about others accessing my machine. I'm mainly thinking 2e, I don't fully understand what's going on there.
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Jun 8, 2010
I have an iMac with OS X and Windows 7 on it. I can use screen sharing through the Finder in OS X to view my Ubuntu desktop (it's on an old emachine in my loft) by default. How can I view and control my Ubuntu box in Windows 7?
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Nov 3, 2010
In my company we all using ubuntu os. For my ERP i connected windows 2003 server through remote desktop connection. Connections are working properly. But i have to configure for print. I have printer connected with my windows xp os. I have to give print on 2003 server via remote desktop connection.. and i want print out on my local windows xp machine. How i have to configure...
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Nov 20, 2010
I need to work with other computer. How could i make it? Should I use SSH over VNC, or?... There is a lot of information about it, but, maybe, too much information. I just need to connect to my other desktop. In win i've used TeamViewer. What should i use here?
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Mar 21, 2010
Today I noticed my Desktop was being controlled remotely from over the Internet even though I had it set for 'local network only'. Foolishly I relied on this setting and hadn't specified a password or other security. The remote user had opened my Firefox passwords page and was perusing this when I pulled the plug.
All external checks confirmed that my router/firewall is actively blocking correctly. How could this happen? How can I prevent this in the future? I had recently install the Firefox extension for Weave Sync and wonder if that had anything to do with it?
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Nov 26, 2010
I just had a window pop up on my desktop saying my pc was being remotely controlled. Ubuntu 10.10The pc shutdown by itself, and I disconnected it from the net.I rebooted and uninstalled the remote desktop app.
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Apr 9, 2010
i have installed ubuntu 9.04 and desktop xubuntu. i want access the sever from my windows xp using either rdp or vnc. i am able to use the ssh but thats only command line. i need the gui desktop. i have installed x11vnc,tightvnc etc. but whenever i try to connect from my vnc manager,its giveout error.machine actively refused it. i havent configured any port or anything like that.
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Jul 7, 2010
Does anyone know what could be causing a Remote Desktop connection to a 10.04 box to be closing after some period of time? I have three systems all running 10.04 with Remote Desktop enabled. I'm using UltraVNC on Windows 7 to connect to them. If I open a connection and leave it open for a long time (like overnight, for example), when I come back in the morning, I still see the VNC window but as soon as I click on it, it closes. I can immediately open a new connection to the box but it now shows two active connections. At first I was thinking maybe there's an idle timeout value but given that Ubuntu still seems to think that the original connection is active, maybe the problem isn't on the Ubuntu side but on the UltraVNC side?
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Sep 16, 2010
how i can get remote desktop to work on a outside Internet connection i can get it to work on my router but my brother cant access it from his pc i have vnc view on his pc but ever time i try to connect from his pc it keep saying cant connect any idea how i would fix this i have the firewall on my lunix system turned off
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Oct 29, 2010
Getting an error while connecting to remote desktop using rdesktop.
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Jan 28, 2011
If you do a search on the web you can find where to download Microsoft's Remote Desktop Connection 7 client (rdp client). To get it to work under Wine (I used Crossover Office) actually was pretty simple. You will need to copy four files from an existing Windows 7 system. Two of them, mstc.exe and mstscax.dll are located in the C:WINDOWSsystem32 directory. The other two files, mstsc.exe.mui and mstscax.dll.mui, are located in a subdirectory within C:WINDOWSsystem32.
The name of the subdirectory will depend on the language and locale of the Windows system you are using. If your language is English and you are in the USA, they will be located in C:WINDOWSsystem32en-us. Copy those 4 files to some temporary directory on your Linux system. Next create a new Wine Windows XP "bottle". Use either Crossover or Wine to browse to the SAME wine C: drive subdirectories as on the Win7 PC (see above) and copy the respective files into each subdirectory in your Wine Bottle. Two files each into 2 different directories.
Next using either Crossover or Wine execute the RDC 7 application.
wine mstsc.exe
In Crossover you can just click the button the RUN a COMMAND and just enter "mstsc.exe". The RDC login screen should appear prompting for a Server address and a login ID. You can also change various other "options". I have not tested alot but it does seem to work pretty well so far.
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Jul 29, 2011
I deleted my windows and now I am alone with ubuntu I use them before and now I can say that they are really awesome, basicly I want 3 things that I am using and then it will be really awesome.
- Remote Desktop Connection In Windows Server.
- A Virtual Camera Like ManyCam
- Putty Client
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Sep 17, 2010
Im using Ubuntu and i need help dose anyone know how i can get remote desktop to work on a outside Internet connection i can get it to work on my router but my brother cant access it from his pc i have vnc view on his pc but ever time i try to connect from his pc it keep saying cant connect any idea how i would fix this i have the firewall on my Linux system turned off.
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Feb 27, 2010
I am trying to connect to my Company network through VPN. I use a Lynksys router which is most likely not the problem, as I can get the VPN and Remote Desktop to work from a WinXP Pro laptop connected to the same router. I have tried several RDC clients, none of them establish a connection. The VPN connection is active, I can ping and Traceroute to it , but I cannot get the RDC to work. The RDC should connect to 189.0.0.10 on the company network.
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Mar 14, 2010
How do i set up a remote desktop connection from my Windows 7 machine to a SFTP server im trying to set up running on Fedora 10.Ive installed vnc server on fedora, and tried tightvnc and real vncviewer on windows and i cant get it to connect. Im not sure how the firewall works in fedora, but ive added the port to the "other ports" section of the firewall. On the windows firewall ive also added the vnc programs to the exception list.
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Feb 16, 2010
I am attempting to set up a VNC with ssh tunneling for remote desktop between my laptop (opensuse 11.2) and my desktop (kubuntu karmic) and using the instructions here: [URL] and here: [URL] but I am having trouble getting remote desktop to work once I establish the ssh tunnel
I start out with
Code:
ssh <user@remotepc> -p <non22port> -L 5900:localhost:5900
That seems to wok and connect properly
The problem comes when I try to use a remote desktop client on the laptop to initiate the VPN desktop sharing and point it to
Code:
localhost:5900
Thats when I get a notification on the host saying:
Code:
Refused uninvited connection attempt from 127.0.0.1
And on the laptop I get:
Code:
VNC server closed connection
I have tried messing with the few settings in Krfb, but none seem to have any impact. How do I open localhost:5900 and allow VPN tunneling to the host machine?
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Jun 5, 2011
I was sitting watching a TV show on the internet (streaming from channel 4) and all of a sudden I get a request from an unknown IP address, outside of my local network attempting to access my ubuntu desktop, I obviously declined straight away and stupidly didn't take note of the IP I've checked my firewall settings and no ports are being forwarded, everything is as it should be. I am running Ubuntu 11.04, and a little bit concerned. As of now I have completely disabled remote desktop on my laptop.
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Aug 1, 2011
I have been using Remote desktop on Windows 7 to view and control my Ubuntu machine in the office quite happily over the office network. No problems there. I wanted to access it from my home connection so I read that I could do this by opening a port on the ubuntu machine's firewall. So I installed a firewall. Didnt see any way to open a port easily so I uninstalled it and installed another one. Same issue so I uninstalled that and then left it. I then tried to Remote Desktop the Ubuntu machine from my Windows 7 laptop and ERROR I can no longer connect.
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Apr 13, 2010
I would like to set up a remote desktop connection between two computers over the Internet. I already tested remote desktop within a local network but it's far from secure enough this time. I will try to follow this guide [URL] (ssh portforward and internet). This still leaves ufw and how it should be configured. Let's say I have this setup, server computer has ip 12.341.245.124 and the client has 78.12.543.234 how should ufw be configured to be secure? This remote desktop wont be connected to a local network
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Jul 5, 2010
I am using TomCat6 with Ubuntu Server 9.10 x64. I successfully configured to iptables to redirect the port "443" to "8443" (Tomcat SSL), using this command:
[code]...
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Jun 14, 2011
I want to connect to my Linux debian server, via Remote desktop connection, but when I give IP of my server and click connect, it fail, it says can't connect to the remote computer and below 3 reason.
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Oct 14, 2010
I have a home LAN server with Ubuntu Desktop edition 10.10 and I'm having a problem with remote desktop application. For now I have a monitor on that machine, but in the future it's gonna be only the box, without any periferal devices. When I try to log in via UltraVNC from Windows XP, on Ubuntu server a little window pops up, asking me to allow or refuse this "invader", so I click Allow and I really have full control on that machine. However, when I dont have any devices I wouldnt be able to click this Allow button, but will have to have full control. So, my question is how to autoclick this Allow button? Or when I try to log in the ubuntu machine, it would automatically give me full control?
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Dec 30, 2010
host always ask password on 1st remote desktop (VNC) access Desktop version... how can I disable this?
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Aug 28, 2009
My home linux box is behind a Linksys WRT110 router. I have enabled the Remote Desktop from System-->Preferences-->Remote Desktop. I then run TightVNC from my WinXP box. As I wish to run a secure connection, my first obstacle comes from PuTTY.
In PuTTY, my settings are as follows:
Host Name(or IP address) Port
xxx.xxx.xxx.xxx 22
SSH-->Tunnels:
[code]....
I recieve "Network error: Connection refused" I have gleened all of this information from other boards and tutorials. I know there is something critical that I am missing.
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Oct 18, 2010
Is there a way gnome can allow a remote desktop / VNC connection if no user is logged in? If the server gets rebooted I can't access it (remote desktop / VNC). Someone physically has to go there and log in. Surely there must be a way as gnome is running just waiting for a login.
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Nov 7, 2010
I have recently installed fedora 14 and configured vpn to access my work network. I need to access some windows machines which although I can ping I cannot remote desktop into. When I go to Applications>Internet> Remote Desktop Viewer and put in the machine name (either just the machine name or the FQDN including the domain name) I get an error "Connection to <machinename> was closed".
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Sep 15, 2010
Windows 2008 R2 running on VMWARE, workstation 7.0, host machine is Ubuntu 64bit, latest release. Have clients connecting via LTSP using Remnote Desktop Connection. I tried several options for RDC like -a 16 for 16 bit graphics, but to no avail.What can I do, to have a better Remote Desktop environment? One thing I have not done, is install the Xserver Via Chrome Custom X server on the LTSP server?
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May 29, 2010
I have set up SSH and redirected the ssh server to listen on another port other than 22 for a bit of added security.
Now in hosts.deny I have:
ALL : ALL
In hosts.allow I have:
SSH : ip_address_of_client
I can no longer connect. I get the message: ssh_exchange_identification: Connection closed by remote host.
When I change hosts.allow to read:
ALL : ip_address_of_client
I can successfully connect the server.
However, I only want to allow SSH access in hosts.allow. What is the correct syntax?
I have tried and failed with each one of these:
SSH : ip_address:port_number
SSH2 : ipaddress
sshfwd-portnumber : ip_address_of_client
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