Ubuntu Security :: How To Prove Ipv6 Has Been Successfully Disabled

Jun 26, 2010

There seems to be much disagreement between distros regarding how ipv6 is disabled, even between different versions of the same distro. Rather than just follow instructions for disabling ipv6 for a given distro, I would like to also test that ipv6 is not used any more. Any software or executable that relies on ipv6, that I can use to confirm that ipv6 has been successfully disabled?

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Ubuntu :: X Forwarding Not Working When Ipv6 Disabled

Dec 20, 2010

Got Ubuntu Server 10.10 installed as a virtual machine (vmware). When i forward X through SSH (putty) i can start xeyes, xcalc,etc.

Now when i disable ipv6 putty can't set the display variable and i get "Error: can't open display". I haven't changed anything in putty or win 7 (the host system).

I disable ipv6 by putting these lines in /etc/sysctl.conf

net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
net.ipv6.conf.lo.disable_ipv6 = 1

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Debian :: Check When On This Usb Live IPv6 Enabled / Disabled?

Feb 5, 2011

I've installed live usb-hdd using live-helper on my Lenny.
How to check if on this usb live IPv6 is enabled or disabled?

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Ubuntu :: Can't SSH In - Prove It's Firewall?

Apr 29, 2010

My sysadmin has let me squeeze an Ubuntu server in amongst his many Windows servers. I'm setting it up to let a third party ssh into it, but I'm having some difficulties getting it to work. There's a Sonicwall in between this server and the net. Can anyone suggest a way for me to prove that the firewall is configured incorrectly?

We've configured the firewall, and it looks like it ought to work. We set up ping and ssh services in the firewall admin interface. I can ping the server, no problem, but I can't ssh into it at all. sshd_config is set up with very generic settings; I haven't changed the port it's listening on or anything in the ListenAddress field. If I try to ssh to localhost from the server's command line, it gives me a comforting RSA key warning.

When I check the log after restarting ssh, everything looks okay to me. It's not complaining about being unable to bind the port to the address or anything. Seems obvious to me that something is wrong with the firewall, but perhaps I'm wrong. The only ways I can think of to actually prove that the firewall is misconfigured are:

1) Remove the firewall entirely, and attach the server directly to the net. Ugh.
2) Set up ufw on the server, remove the firewall entirely, and attach the server directly to the net.

What am I missing here?

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Ubuntu Security :: How To Disable IPv6 On 10.04

Aug 9, 2010

Anyone know how to disable IPv6 but still use IPv4?

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Ubuntu Security :: How To Enable Ipv6 In Snort

Sep 1, 2011

How to enable ipv6 in snort. I read that it must compilate with --enable-ipv6 but still don't know how?

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Fedora Networking :: Ipv6 With Tunnel Broker - Better Client For Non Native Ipv6 Connectivity?

Jul 22, 2009

I used to play with gw6c ( a client for tunnel broker ) It works well with fedora9 , fedora 10, but not with leonidas. my rpm is gw6c-6.0-0.4.beta4.fc9.i386.rpm ( a little old!) when I tried to install i have got this: libcrypto.so.7 est ncessaire pou w6c-6.0-0.4.beta4.fc9.i386 I try to make a soft link to libcrypto.so.0.9.8k, but nothing; The question :-Is there a solution for that pb - did you know a better client for non native ipv6 connectivity?

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Fedora Networking :: FC15 IPV6 Wireless Router - No Longer Gets An IPv6 Address

Aug 31, 2011

I have been struggling to get FC15 to act as an IPv6 router for a while now, am sure I am missing something trivial.. The idea is that I have a ppp / adsl connection (this works fine), use the wireless card on my pc with hostapd and dhcpd to provide connections to other pcs (works fine), and radvd to delegate ipv6 addresses.

The issue seem to be that as soon as I turn on ipv6 forwarding (net.ipv6.conf.all.forwarding =1), the ppp connection no longer gets an IPv6 address. This means the router cannot ping any ipv6 address outside my network.

If I disable ipv6 routing, my router gets an IPv6 address on its ppp connection, and can ping things such as ipv6.google.com just fine, however (of course) no packets are forwarded from my network and radvd complains that forwarding is disabled.

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Ubuntu Security :: Break In Through Disabled Root Account?

Nov 11, 2010

If root is disabled by default, how is it possible that someone managed to SSH into my computer using root? I never enable/set password for root, it's always left as the default as per a fresh install and I always use sudo for any admin tasks.Auth.logFirst there are a whole load of failed attempts then...

Code:
Nov 8 11:07:32 Morris-Desktop sshd[3601]: Failed password for root from 94.243.50.53 port 4360 ssh2

[code]...

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Ubuntu Security :: IMDB Remembers Pages History - Cookies Disabled

May 29, 2011

IMDB gives me a "recently viewed" list of pages I viewed recently (and a few of them were months ago, since I don't go there too often) at the bottom of every page I view. My cookies are enabled for session-only, have adblock plus, my ip changes every day, how are they doing that? How can I prevent it? What other websites are using the same trick? At this page [URL] there's a link there that says "Clear entire history", but I want to disable them from being able to track me like that, if they can track me, so can others.

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Ubuntu Security :: Set A Rule In Iptables, Does That Rule Also Apply To Ipv6, Or Just Ipv4?

Jul 16, 2010

Question (and Google results aren't making this clear): Ubuntu has both iptables & ip6tables installed. 1. If I set a rule in iptables, does that rule also apply to ipv6, or just ipv4?

2. If "no" to above, then it would be prudent to *also* set ip6tables rules as well if I want to maintain an active firewall, correct?

3. Does ip6tables rules have the same syntax and behavior (more or less) to iptables rules - i.e. can I just copy my iptables rules & change "iptables" to "ip6tables"?

4. Any gotchas or issues that I should be aware of?

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Security :: Cmos - Disabled Hard Drives Still Be Accessed By Malware ?

Jul 23, 2009

I was thinking of physically removing the hard drive and use the computer only with a liveCD for security. But is disabling the hard drive in the cmos just as secure, or does software exist that can still access the hard drive?

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Ubuntu Security :: Seahorse Export Menu Is Always Disabled - Export The Passwords To Restore It After Formatting Machine?

Jun 12, 2010

seahorse export menu is always disabled. I need to export the passwords to restore it after formatting my machine.

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Ubuntu :: Cannot Run Any X-commands Successfully?

May 28, 2011

I had ubuntu working fine, but then I started tinkering with the DISPLAY variable and maybe some other xserver setting, and now the system is stuck at the login screen.If I type in my password and hit enter,it will go to a black screen, and then go back to the login screen.When I enter console mode with control-alt-F1, I can login fine, but I cannot run any x-commands successfully.

$ startx gives the error:xauth: error in locking authority file /home/system/.Xauthority
xauth: error in locking authority file /home/system/.Xauthority

Fatal server error:Server is already active for display 0.If this server is no longer running, remove /tmp/.X0-lock and start again

Please consult the The X.Org Foundation support at http://wiki.x.org for help

ddxSigGiveUp: Closing log
No Protocol specified
xinit: giving up
xinit: unable to connect to X server: Connection refused
xinit: server error
xauth: error in locking authority file /home/system/.Xauthority

I removed that file as directed, but it didn't fix anything

$ gdm gives the error:

** (gdm-binary:1668 ): WARNING **: Failed to acquire org.gnome.DisplayManager: Connection ":1.36" is not allowed to own the service "org.gnome.DisplayManager: due to security policies in the configuration file

** (gdm-binary:1668 ): WARNING **: Could not acquire name; bailing out

I've tried running the command:$ sudo dpkg-reconfigure xserver-xorg,but it didn't change anything

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Ubuntu :: Does Anyone Print Envelopes Successfully?

Mar 2, 2011

I have searched the web and the OpenOffice forum for answers to this and have come up empty-handed. I've also searched Ubuntu forums. The posts dealing with envelope printing are old AND essentially unsolved. Doesn't anyone need to print envelopes from Ubuntu? When I was using another OS with another word processor, envelopes were as easy as burping. They took 20 seconds to setup and they printed flawlessly.I hear OO on Windows is decent with envelopes, but I have no experience with that.

I have a Dell Laser 1720, using the Generic PCL 6 driver "ok'd" by Dell with this printer, and the printer works for normal prints. However, with envelopes, OO presents the WYSIWYG as fine, but the print is all messed up, text direction going 180 degrees wrong way, messed up vertically and horizontally. I suspect it has a lot to do with the fact that from OO my paper size choices are more limited than they should be for this printer. It only lists "letter, legal, executive, A4"--no envelopes and no ability to define custom size.What gives? Does anyone have any insight? I'm running OpenOffice 3.2.0 and Ubuntu 10.04 LTS (Lucid). I've spent hours on this and the only pathetic way I've come up with getting one to print...sort of good enough... is by exporting envelope from OO to PDF, then open in PDF software which DOES let me change printer settings, paper size to number 10 envelope. That's not what I call a solution though.

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Ubuntu Installation :: Unable To Install And Successfully Run 9.10

Feb 1, 2010

I have not been able to install and successfully run Ubuntu 9.10. I am now wondering if I will be able to go from 9.04 to 10.04 this coming April. I think that somewhere I read it isn't good to do this, but I don't have much choice.

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Ubuntu :: Can't Successfully Insert Images Into Evolution?

Jun 12, 2010

Using Ubuntu 10 (Ubuntu Studio) with Evolution 2.28.3 - i can LOAD images into Evolution and they appear while i compose the email but they do NOT appear in the recipient's email -- they do not appear even if i send an email to myself! I DO have "format messages in html" checked. I DO NOT have "always load images from the internet" checked because that refers to my inbox, not to me composing an email; instead, i have "load images in messages from contacts" checked; besides, these are local pictures that i am inserting, not from the web. Again, neither a friend can see the images (though she can when receiving them from other ppl) nor can i see them if sent to myself, or even in my copies in my "sent mail" folder. The emoticons behave similarly. Is this a glitch? I am new to Evolution, though quite familiar with Linux and with T-bird, K-Mail, Claws, etc.

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Ubuntu One :: Error - The Process Did Not Finish Successfully

Apr 25, 2011

When I try to connect UbuntuOne, it gives an error -"The process did not finish successfully."

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Slackware :: Has Anyone Successfully Built GSB 2.30 On 13.1?

May 28, 2010

Iwhen I get my 32 bit build machine upgraded to 13.1 I was going to to try building GSB 2.30.

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Slackware :: Has Anyone Successfully Used PCI-E USB 3.0 Add In Card?

Mar 28, 2010

Has anyone successfully used a PCI-E USB 3.0 Add in card?I am looking at a couple, but they all look like they require special drivers...

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Ubuntu Installation :: 10.04 Installs Successfully But Does Not Boot Upon Reboot

May 19, 2010

Recently I have built an old pc using bits and bobs that have been collecting in the garage for years and decided to try and turn it into a file server, and to get some experience in networking etc. Now I had a choice of 2 motherboards for the system:

1.)gigabyte ga-8siml
2.)elitegroup l7s7a2

I first built the pc using the gigabyte board,install was successful and ubuntu server booted on restart. The only problem was,there is no onboard lan on the board and the only spare wireless pci card I found was completely frazzled. Rather than buying a new wifi card to get the system running, I thought I would try the other motherboard since this had onboard lan. The elitegroup motherboard however does not have onboard vga, so I dug out an old agp ati radeon 9200se 128m ddr tvo graphics card and plugged her in. The install went fine,but after a restart, I'm left with a blinking cursor at the top left of the screen.

If I hold down 'shift' for long enough I can bring up the grub menu,but if I select anything I get no signal on the monitor. After a while on the blinking cursor screen the monitor will time out to no signal on its own. I have tried the installation using different combinations of the options given by F6 of the first installation screen but to no avail. I have also tried installing the generic kernel as opposed to the generic-pae.

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Ubuntu Networking :: Unable To Successfully Use Bluetooth Dongle

Aug 14, 2010

I recently purchased an inexpensive bluetooth dongle for my laptop running lucid 64-bit. the device, however, doesn't seem to want to work in ubuntu. most functions (everything but turning the device OFF) fail, causing gui windows to hang, and i mostly receive messages relating to the device timing out.

Before you ask, it is not the device: the dongle works flawlessly in windows 7 after being autodetected and autoinstalled. i attempted to boot from the lucid cd, and the problem persisted.

Code:

Code:

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Ubuntu :: Laptop Suddenly Didn't Successfully Boot?

Jan 15, 2011

I took a video of my laptop screen as I was trying to boot it. I've tried turning it off and on several times but still same thing happens. Will I be able to recover my files in there?

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Ubuntu :: Kubuntu Natty Successfully Runs Windows XP

Jun 27, 2011

I recently bought an IdeaPad Z570 laptop with Sandy Bridge Intel Core i5 processor, 3 GB RAM etc.I still have things that I am forced to go to Windows for, so I had to make it a dual boot system. And I went and installed Windows 7 because that's what Lenovo provides the drivers for.

But to my dismay, lots of stuff, especially my Keyman keyboards, didn't work on Windows 7. So I installed Windows XP!But there are no drivers for this latest hardware for Windows XP. So what did I do?Installed VirtualBox on Kubuntu and installed Windows XP as a guest system using it! Linux/Kubuntu takes care of the hardware (or something like that).Installing VirtualBox Guest Addons from Multiverse also enables me to share directories between the Linux host and Windows guest, so I can access the files on my Windows D drive by mounting it in Linux (which I do by default in /etc/fstab anyway) and sharing it via VirtualBox Shared Folders.Given that Intel Virtualization Acceleration technology is inbuilt into the new processor/chipset, I don't feel much difference in speed!

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OpenSUSE :: Has Anyone Successfully Installed DockBarX?

Sep 10, 2010

I tried out DockBarx on my previous Ubuntu computer and really liked it. I installed openSUSE not too long ago and I just decided it's about time to get it back! However, I'm having some trouble installing it. My initial attempt was to simply download the tarball of dockbarx from GNOME-Look, untar it and run setup.py. Unfortunately, it will not run for me..not as root, standard user, anything. I do have Python-Base installed, and my "cnf python" does return a successful response. My PATH has /python's location in it and everything.I then tried the .rpm but I need to install python-keybinder, pyxdg and dbus, but I cannot find any downloads or repo's with it. I could simply be missing it though. So, basically, I'm asking all of you who have successfully installed it on your openSUSE system to inform me on how you did it.

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OpenSUSE Install :: Can't Successfully Download 11.4

Mar 29, 2011

I've tried downloading 11.4 64-bit about a dozen times, and it always failed to checksum comparison. I've tried downloading it directly using Mozilla. I've tried that from a mirror (several actually). I've tried using Download Them All to get it and is failed both the MD5 and SHA1. BTW, those fail the checksum as soon as the Download Them All window opens. I've tried bitTorrent. I've tried it on two different machines. I've tried it from linux through Mozilla and Download Them All just to be sure it's not my anti-virus or software firewall.

BTW, in the process of installing a new HD on my desktop, somehow my OpenSUSE linux install has gotten corrupted (or something), so I don't have access to a linux install. Any suggestions how I can get a good download? I'm hoping I can use it to repair my existing install, and to install openSUSE on my laptop.

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General :: How To Know New GCC Version Installed Successfully

Jun 11, 2010

I have already installed 3.4.6 version of gcc and i have installed older vesion 3.2. Now I want to check the version gcc-3.2 installed successfully or not? Second, I want to switch over the version gcc-3.2. What is the procedure require to be done?

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Server :: Apache2-mpm-itk Will Not Successfully Restart

Jun 15, 2010

I am having some problems after installing apache2-mpm-itk on my Debian 5.4 server. From my understanding apache2-mpm-itk will run child processes as root until a http request is received. It then suid's to the username in the VirtualHost directive. This is all working fine, as I can see a few apache processes started by a specific user.

However, the problem is when I try to restart apache. It will kill all the processes running by root but wont kill any of the processes that have been suid'ed to another username.

When i attempt to restart I get this error:

Code:
charged:/etc/apache2# /etc/init.d/apache2 restart
Restarting web server: apache2 ... waiting (98)Address already in use: make_sock: could not bind to address [::]:80
(98)Address already in use: make_sock: could not bind to address 0.0.0.0:80

[Code]....

If I do a "ps aux | grep apache" before and after I see all the root processes killed, but processes running as specified users from VritualHost directive remaining.

Now I am not an extreme linux power user, but I know a bit.

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Slackware :: Anyone Successfully Runs Xp / Win7 In VM?

Jul 19, 2010

I was just wondering if anyone successfully runs xp or win7 in a VM? I do a lot of .net and sql server at work, and therefore really need visual studio at home.I'm toying with deleting my xp partition and running it in a virtual machine, but part of me is saying not to bother.

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Ubuntu Networking :: Wireless Does Not Work (gets Connected To Network Successfully)

Jun 10, 2010

I just upgraded to 10.04 from 9.10 and I ran into few issues.

Laptop - Dell Vostro 1520
OS - Ubuntu 10.04 64 bit

Issue - My wifi connects to the network properly and shows connection established. But I am not able to browse. I tried ping and I didn't got any response. But I was able to get response when I use ethernet (wired connection) and I am able to browse. No issues with wifi card as my wifi is working properly from Windows and with the same network. I did a complete update again before posting this and it is yet to be resolved. Here are the output of some commonly asked outputs with wifi enabled and connected:

1. sudo lshw -C network

Quote:

*-network
description: Ethernet interface
product: RTL8111/8168B PCI Express Gigabit Ethernet controller
vendor: Realtek Semiconductor Co., Ltd.

[code]....

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