Ubuntu Networking :: 10.10 Reverse X11vnc Color Depth Changes?

Nov 15, 2010

I have looked around and haven't had a lot of luck finding any information on this. I could be blind...but I'm not sure, haha.

I do a lot of remote support for my clients (I do PC repairs and training). I have recently starting suggesting to some of my basic users that they give Ubuntu a try. So far it has been very well received and they are loving it. The problem I am running into is that some of them use laptops in multiple places, and some use routers that are not easily configured. In each case it makes port forwarding a large pain in the behind to allow for remote access.

I have started using the X11vnc reverse connection and it has been working well, except for the fact that it is using high quality color depth (24bit I think?). I know when starting the connection from my end I can set the color depth, but is there any way to set the depth of a reverse connection?

Also, I understand that using just vnc over the Internet is not secure. I need to look into a decent guide to set up SSH tunneling for this. I don't suppose anyone knows of a good guide for 10.04 and 10.10?

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Ubuntu :: How To Increase The Color Depth

Apr 6, 2010

I've a laptop from 2001 with 512MB of RAM, and I was running Windows XP, and the laptop wasn't coping very well with the huge demands of the applications of today. It was only yesterday I installed Ubuntu alongside XP and I was surprised to see how fast everything was!

The only thing that's bugging me a bit is the screen. Some parts of the desktop shows some banding where there is meant to be a gradient, probably telling me to increase the color depth. Is there a way in Karmic Koala to change the color depth? I tried using sudo gedit /etc/X11/xorg.conf but when the editor shows up with the setting file, it's empty.

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Ubuntu :: 9.10 Keeps Switching To Low Color Depth?

Apr 12, 2010

Basically I've just installed Ubuntu 9.10 on an old Acer Aspire 3000 laptop. When I first did the install I observed that the screen color depth was very low so after browsing the forums I ran the latest updates and then everything was perfect.

However after a restart the color depth reverted back to low. I created an xorg.conf file and set the default depth to 24. However no luck. I then set the color depth to 16 in this file and restarted. This time it switched to the 16 bit color depth, however after a restart again it all reverted back! I tried changing the value again but it is now stuck at the low color depth again.

The driver I am using is the updated SIS driver that was provided from Ubuntu for the onboard 661 SIS video card.

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Ubuntu :: Change The Color Depth From 24 To 32bit?

Oct 28, 2010

since I don't have a xorg.conf anymore (just wasn't installed ) I wonder how to change the color depth to 32.

I'm using the standard xserver-xorg-video-radeon driver.

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Ubuntu Multimedia :: 10.10 LTS Using Compliz With 32 Bit Color Depth?

May 5, 2011

I've been "on vacation" using gnu/linux since koala 9.10. Now after come back in, I realize that there is no xorg.conf file in ubuntu maverick 10.10. But we can create it however.

My lab is now using onboard vga, intel G41 Express, 32 MB dedicated, 782 shared memory (I have no clue about this )

I recently using compiz in 16 bit color depth, and it run pretty smooth. After enabling /etc/X11/xorg.conf and changing/adding Defaultdepth to 24. I can't use compiz again. My goal is to set compiz for 32 bit color depth

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Ubuntu :: Karmic - How To Change The Color Depth

Mar 11, 2010

I am running Karmic Koala on a Dell Precision M90, and have some problems with my color depth, or at least that's what I believe. I have googled this problem numerous times, reading a lot about /etc/X11/xorg.conf, and have created numerous files in that location, with all manners of (probably) valid contents. I have yet to try invalid contents, in the hope that Linux is reading the file, and doing so would crash the system. This is my current xorg.conf, after many iterations:


Section "ServerLayout"
Identifier "X.org Configured"
Screen 0 "Screen0" 0 0
InputDevice "Mouse0" "CorePointer"


Now, is there some other place to change this? Should I sacrifice more virgins to Cthulhu, or is Hastur the one to ask in these situations?

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Ubuntu :: Changing The Color Depth From Whatever It Is Now To 24bit?

Dec 29, 2010

I am trying to create a media server, and I decided to try out Ubuntu, but I'm having trouble figuring this out. I have taken a suggestion that I got from another forum, but it did not work.

I'm using version 10.4 and I have to get it to at least 24 bit so I can run XBMC. I have a friend that works for red hat and he said I needed to find the restricted driver or something, but I can't find it, and he doesn't know where it might be on Ubuntu. So, does anyone know how I can change my color depth to 24bit?

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Hardware :: Change Color Depth From 24 To 16?

Oct 6, 2010

Ok I've tried editing xorg.conf, screen section which looks like this

Section "Screen"
Identifier "aticonfig-Screen[0]-0"


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Debian :: Set Color Depth To 32 In Gnome?

Jun 22, 2010

Just installed 32 bit Lenny 5 in virtual box, a software computer, and virtualbox say that it wants the color depth changed from 24 to 32. Tried manually changing xorg.conf but then X would not start saying: 32 depth was inconsistent with 000 weight.

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OpenSUSE Hardware :: Changing Color Depth In 11.4 KDE?

Apr 5, 2011

1. Identify what my current color depth setting are? (default opensuse 11.4 KDE install)

2. How do I change it? Am assuming it is set to 32bit now, would like to set it to 24.

The reason is my little netbook really burns up when i play a video.. acer aspire one and one of the reason why I installed linux over windows 7 was that I wanted my laptop to run faster ... apart from the fact that I would have installed suse anyways!!

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Ubuntu Multimedia :: No Xorg.conf - How To Change Color Depth

Aug 4, 2010

I want to change color depth, but there's no xorg.conf file to edit... what to do? btw, shouldn't there be a simple gui for that? Like for changing resolution

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Ubuntu :: GNOME Loses Color Depth After Screen Turns Off

Mar 13, 2011

Problem appears every time I leave my computer for a while and my screen turns off because of inactivity. Then after screen starts again, my desktop looks like it lost color depth. I can see wallpaper that consists of big blocks of color tones instead of being smooth. Temporary I had to disable blank screen during inactivity in Power management settings. I have installed:

Ubuntu 10.10 x86_64
kernel 2.6.35-27-generic
GNOME 2.32.0

My graphics card:

ATI Radeon HD 5470 512MB
ATI/AMD FGLRX driver installed

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General :: Change Color Depth In KDE In User Mode?

Jul 20, 2010

I want to increase the color depth for my user account in kde. I cannot edit the configuration in /etc/X11. Is it possible?

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Ubuntu :: Monitor Display Awful (color Depth) Acer Aspire 1710?

Oct 29, 2010

I've been desperate to successfully install Ubuntu on my Acer Aspire 1714SMi (old and huge, I know), but the display suffers from a greatly reduced color range, strange white haze/ fine vertical lines and virtually ilegible text. I took a screen shot as I know it's hard to describe these things, but it looks normal on the image! The Graphics Driver is nVIDIA GeForce FX Go5700 128MB. The display is perfect on XP.

I downloaded some NVidia Drivers for Linux from nVidia & from here: [URL] Can't get any of them to work, and I find it hard to believe it's so difficult to get a basic display to work. I'm about to give up.

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Fedora Installation :: X11vnc : Tail: Cannot Watch /tmp/x11vnc.tray.*

Jun 18, 2011

By invoking x11vnc with the -gui tray option the TCL/TK GUI attempts to embed itself onto the system tray, but I encounter the error message "tail: cannot watch /tmp/x11vnc.tray.*", after the first settings dialog approved [clicked OK]. I believe that a package is still missing to be installed and this is not really a software bug. I use the XFCE version shipped along F15, and the GUI can be started but not as a docked-applet.

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Ubuntu Networking :: How To Setup The X11vnc

Mar 5, 2011

I am a linux novice with root access to an Ubunutn 10 VM which i connect to via putty. I want to connect to it via a GUI from windows xp so I have tried installing x11vnc on the machine and used realvnc from the xp client I have tried to install x11vnc on the machine as follows

sudo apt-get install x11vnc vnc-java"
x11vnc -storepasswd
iptables -A INPUT -p tcp -d 0/0 -s 0/0 --dport 5900 -j ACCEPT
iptables -A INPUT -p tcp -d 0/0 -s 0/0 --dport 5900 -j ACCEPT


This seems to load ok but removes the shell prompt. I presume the server has started and is listening on the ports so i used another putty window to reconnect to my machine and ran sockstat -l and xllvnc is listening on the 2 ports. I then downloaded realvnc windows client and entered the hostname to connect If i entered just the hostname or hostname:5900 i get a timeout error but if i enter hostname:5800 i get 'connection refused' error

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Ubuntu Networking :: How To Restart X11vnc

Sep 13, 2010

How can I restart x11vnc service?

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Ubuntu Networking :: X11vnc - Permission Denied (publickey - Password)

Sep 22, 2010

I want to access my desktop from my laptop over the internet, after a while I found this [URL] so I followed the instructions "Access your PC over the internet" and "Logging in from another Ubuntu PC". Everything goes well until I try to run the shell script and get this: laptopuser@123.456.7.890's password:

I tried my luck with the passphrase associated with the rsa key, with the password of the laptopuser@laptop and with the password of the desktopuser@desktop but I keep getting Permission Denied (publickey, password).

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Ubuntu Networking :: X11vnc Not Passing Upper Case Characters?

Apr 1, 2011

Using 10.04 and x11vnc I'm finding that upper case characters are being sent as lower case. I've tried multiple keyboard configurations with no success

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Server :: Bind Reverse Zone : No Name With Reverse Lookup

Oct 12, 2009

I am using RHEL5. These are my config files:


options {
listen-on port 53 {;; };
listen-on-v6 port 53 { ::1; };
directory "/var/named";


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Ubuntu Networking :: Reverse SSH Tunneling

Feb 2, 2011

I want to be able to SSH into my computer that I can't expose port 22 on. I've tried the ssh -R ... several times, but can't manage to make it work.I have my home computer (want to SSH into), server (can SSH into), and some computer I want to SSH from.Do I need to install the sshd on the machine I want to SSH into? What are the commands I need to enter to forward from my server to my home computer?

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Ubuntu :: Can GNOME Color Be Used To Alter Ambiance Theme Color?

Jan 12, 2011

Can GNOME Color be used to alter this change directory color in Ambiance theme? I'd rather have white.

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Networking :: Reverse SSH Tunnel Ubuntu And Windows 7?

Oct 3, 2010

I am currently running 64-bit Windows 7 from my home laptop and I would like to establish an SSH reverse tunnel to my laptop from my work Ubuntu 64-bit machine. I have been reading many "tutorials" that have led me nowhere and I feel as though I'm chasing my tail now. I have done the following on my Ubuntu machine:

ssh -R 19999:localhost:22 laptop_ip
and on my Windows machine, using putty, did the following:
Host Name: host_IP


I am able to access my Ubuntu machine when on my work network but there I have been unsuccessful when it comes to trying to remotely access it. I have tried everything that I can think of (though I am a novice). If there is any help/suggestions/ideas that could help, please let me know and don't hesitate to ask for more info!

p.s. I would also like to enable x-forwarding, but for now I would like to have remote access to the Ubuntu machine.

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Ubuntu Networking :: Closing A Reverse SSH Tunnel?

Jan 31, 2010

so i start it with ssh -f -R 4096:localhost:22 me@server.com and it comes up and someone can log in at the remote end. how do i close the tunnel from the initiating end ? netstat doesnt seem to identify my end of the tunnel , unless im looking for the wrong thing!

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Networking :: Set Up Reverse DNS To Domain?

Sep 12, 2010

I have a domain and the settings for it are pointed at my IP address. But when I look up my IP address, it does not show my domain as the hostname. What settings do I have to change to make my IP translate into my domain as the hostname?

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Fedora Networking :: Set Reverse Dns For IP?

Feb 28, 2009

how to set reverse dns for my IP? I've configured bind with a reverse dns for my IP, but it doesn't work when I test it.

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Ubuntu Networking :: WLAN0 Will Do Reverse Dns Lookups But Not Forward

Jul 17, 2011

p, li { white-space: pre-wrap; } Laptop connects to a (wired) ethernet port on a DLINK DIR-625 wireless router using dhcp. All works perfectly.

Using the same laptop connecting to the same wireless router, but using the wireless adapter and dhcp instead of wired ethernet, I can ping IP addresses on the LAN and also WAN IP's to/from anywhere on the net. I can perform reverse name resolutions (ip to host name), but not forward lookups (host names to ip addresses). I can use the DNS server obtained from dhcp or specify, by ip address, a DNS server to perform the lookups. This makes no difference.

Web pages (LAN server pages or from the internet) are not accessible by site address name or by ip address specifically.

Kubuntu 11.01
$ uname -r
$ iwconfig


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Networking :: Bind9 : Reverse Lookup And PTR Value?

Oct 23, 2009

I have the following bind9 configuration, and I'm trying to resolve reverse lookup IP address to name.

$ttl 38400
mydomain.org.INSOAmyhosting.com. (


** server can't find NXDOMAIN

Is my PTR wrong, or what do I need to have the reverse lookup working ?

Note: I replace real IP by, same for my domain name.

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Networking :: Forward Reverse Dns Subnet?

Mar 25, 2010

I have the zone record 0.16.271.in-addr.arpa which is working fine.

The NS for that zone is setup for my own name server.

I however would like to forward requests for to another name server. How would I do this?

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General :: Desktop Environment Color Settings / Do They Affect Web Browser Color?

Jun 14, 2011

Kernel, Slackware 12.0
KDE 3.5.7
(Mozilla) Firefox

Do color settings in the desktop environment affect color in the web browser? Thanks.

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Software :: Screen App / Retain BG / Color Background Color Gets Lost

Jul 6, 2009

I am using the screen app, and have set bce to on, and issued the following commands to set my background and foreground color: tput setab 4; clear; tput setaf 7; clear;

This temporarily sets everything properly on my screen. However, when I issue any commands that change or set their own background color (for example, when I issue an "ls" command with colorized output), the background color gets lost for any new output and I have to reissue the commands listed above in order to retrieve my background color.Ideally I'd like to keep my background color when issuing these commands, as it serves as a good way to remind me of what environment I am currently issuing commands in.

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Networking :: Reverse Lookup Fail For Another Domain?

Jun 3, 2011

I've got 2 domains:


This is how I've configured my resolv.conf file:


When I run the host command, it can resolve machines in one.domain.com using both hostname and ipaddress. But when I run the host command for machines in two.domain.com, it only works for hostnames but not ip addresses. The result for ip addresses is:

Host not found: 3(NXDOMAIN)

Why doesn't it try the 2nd nameserver in the resolv.conf file when resolving by ip adddress? Reverse pointers are configured for each machine in their respective domain dns servers. O/S is Oracle VM Server 2.2.1 (similar to Red Hat). Kernel is 2.6.18-

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Networking :: Reverse SSH Connection Super Slow?

Dec 3, 2009

I am have setup a temporary ssh server to reverse ssh to remote clients. When a client has an issue I have them reverse ssh to my server and then from my laptop or workststation connect to there workstation. The problem that I am having is when I connect to them from behind my firewall from my laptop the connection is really slow but when I connect to them from the firewall it is fast. I am using Firestarter which is simply a GUI for iptables. I am trying to figure out what iptables rule is causing the connection to slow down behind the firewall.

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Networking :: Multiple Reverse SSH Tunnels For 100+ Servers?

Jul 26, 2011

I am looking at using reverse SSH tunnels to manage servers on client sites. I have played around with reverse tunnelling, and have it working on one server back to my middle man server from which I can SSH across from my own PC. All working fine. When I scale this up to 100+ servers reverse tunnelling in, usernames & passwords become a pain, so I'd prefer to use RSA keys instead. My question, finally you might say, is this, to successfully ssh from my PC to the remote server, do the RSA keys need to be on the middle man server as well, or is it just my PC and the remote server?

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Fedora Networking :: Ssh Reverse Tunneling Failed?

May 7, 2011

I am trying to use the ssh reverse tunneling through the command

ssh -l login -p port <ip address> -R <remote port>:<local Ip>:<local port>

In order to enable some one in the remote host to connect my machine. through the command

ssh<remote port>

However when I try to execute the first ssh command above I got the warnning

Warinning: remote port forwarding failed for listen port <remote port>

The problem always happens when the remote host I have tried to connect is my Fedora 14 machine. I can do that when using an Ubuntu as the remote host.

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Networking :: Reverse DNS Pointer External Server?

Dec 9, 2010

I config a revers dns im my domain, but him pointer to external server. Check all dns, virtual servers and apache configurations and dont find where it pointer to out. I too check with:

# host -t ptr domain name pointer srv.businessconnection.com.br. Should point to another server, this no is the correct!

I make equal config another server and work very well, but in this are some erro. Somebody know what I doing wrong?

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Fedora Networking :: Reverse Usb Tethering Android Device With 15 ?

Sep 2, 2011

I don't know what the problem is, I followed the instructions here: [url]

But like some other folks there, netcfg usb0 dhcp just eventually times out.

I have an htc evo and fedora 15.

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Networking :: Vhost With Reverse DNS On ADSL2 Connection Not Binding

Mar 22, 2010

I'm working on an ADSL2 connection that connects via PPPoE and it is assigned a static IP. On top of the static, the ISP has assigned a small block of 6 useable IP addresses.

- The primary static IP is on the interface ppp0
- The other 6 IPs are configured as eth0:1, eth0:2, eth0:3 etc.

With the above setup all IPs are reachable and useable on the internet.

- The revers DNS has been updated for a few of these and resolves with no problems. ie: eth0:1 has the IP and resolves to blah.host.com and blah.host.com resolves to the IP address.

- To test this I have tried a program like BNC to bind to the IP address on eth0:1 but for some reason when connecting externally the host address is coming up with the FQDN on ppp0 interface IP, not the vhost IP.

Questions is, is this the normal behaviour since its a PPPoE connection and would only work if the ISP supported a bridged connection? something on the ISP end not allowing this to work?

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Networking :: DNS Reverse Lookups Not Working For Private IP Addresses / Fix It?

Jul 13, 2011

We have bind 9.3 running on CentOS 5.2. We are able to do reverse lookups for the public IP's but not able to resolve to the private IP's on our network.

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Networking :: Iptables Or Reverse Proxy For Oracle Database?

Feb 15, 2010

I'm trying to access my oracle database (port 1521) from the outside.What I have:Outside -----> Proxy ----> DatabaseWhat I try is to configure a reverse proxy or iptables for accepting connections on port 1521 and transfer them to database. Only one computer of the outside will have access to the database.I suppose than this can be done with iptables or another way.In the real environment proxy will have two nicut for test purposes my computer will have only one (for test purposes, the tree computer will be in the same net)

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