Ubuntu Security :: Remove The 6600/tcp Connection Ability From XWindow?
Apr 15, 2011
I've been reading a lot of articles on Xorg XWindow System having the ability to allow 6600/tcp for remote screen connections and I've been trying to find a way to remove the functionality without having to just dump XWindow and settle for CLI on my server. I heard it was disabled by default, but I just want to get rid of that ability completely by cutting it out of it's code and yes, I'm feeling very, very paranoid.
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Sep 29, 2010
I know very little about MySQL, but I've got some users that need it for testing on a Linux server.So I had set it up a while back, but now I'm running into some small problems.Right now, each user has his own database that I created and can do whatever with it. Each user only sees their own database.I didn't want them to be able to create new databases at all, but they can and when they do anyone can see them.
EDIT(Apparently they can only create databases beginning with the word "test" in the name)
I need to either:
1) Stop them from creating new databases (without affecting their ability to interact with the existing database)
OR
2) Make it so that when they create a database, only they have privileges on it and only they can see it (except mysql root of course).
Anybody know the statement to set these kinds privileges up?
EDIT: pfft... I've a read a bit more and realize that this is an intended part of the installation.
EDIT2
I'd still like to remove the ability to make test databases.
EDIT3:Ok, for reference this is how you prevent users from making and using test databases:
shell> mysql -u root -p
Enter password: (enter root password here)
mysql> DELETE FROM mysql.db WHERE Db LIKE 'test%';
mysql> FLUSH PRIVILEGES;
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Jan 3, 2010
I'm relatively new to Linux. My netbook ran updates yesterday for Ubuntu and now I am unable to reconnect to wireless network connection. I am using WPA2 encrypted security. I am able to connect via wired LAN. Also, when I went to connect using USB mobile connection, I get an error "unable to mount location". I get the same error if I try to connect my external CD drive. I am using Ubuntu 8.04 with Gnome desktop (2.22.3) on a Dell Mini 9.My wireless device is using Broadcom STA Wireless driver for an 802.11 wireless card.
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Mar 9, 2011
I decided to consult you before making any changes, because the clients' PCs are spread all over the country and I do not have the physical access to their boxes.The idea is to take away the ability of using sudo for common users.I know that the syntax of this file may vary a bit in different distributions.Our OS is Ubuntu 10.10.I created the account 'support' for me and other technician stuff of our department. So, 'support' user must have all the power. And common users mustn't have access to 'sudo'. This is the requirement.As far as I remember, in Slackware the user must be a member of 'wheel' group to be able to use 'sudo' (but I may be wrong).
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Jan 1, 2010
I'm relatively new to Linux.My netbook ran updates yesterday for Ubuntu and now I am unable to reconnect to wireless network connection.I am using WPA2 encrypted security.I am able to connect via wired LAN. Also, when I went to connect using USB mobile connection, I get an error "unable to mount location". I get the same error if I try to connect my external CD drive. I have tried to force mount but no luck.
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May 18, 2011
A create an application which has to bind to port less than 1024 and must be launched under non-root user. OS: Ubuntu 10.04. Decision 1: Using a firewall to redirect packets. Problem: This decision is not good for me. I need simple way to solve the problem. Decision 2: Use CAP_NET_BIN_SERVICE. Problem: My execution file has 2,7G size. It is very big application with a lot of debug info. setcat command return an error:
[code]...
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Feb 8, 2011
So, I am looking to implement an FTP server with Isolated Client accounts/directories where a client can only access what's in their directory. I also need to provide my internal user's (content managers) the ability to upload, delete, etc from all of the Client accounts. The simple part is creating the secure client accounts. It's a matter of changing DIR_MODE in adduser.conf to 700 or 770, creating a user, having the FTP server chroot them to their home directory, revoke/restrict shell/ssh access and maybe even slap on some ACL to prevent botched permissions.The hard part is figuring out how to give my power users the ability to access all of their folders without thrashing security.
My first thought was to put all of the client user-groups in a parent group and having my internal users inherit group permissions..but you can't have groups inside of groups.My second thought was to put all of the client users in the same group and prey that the FTP chroot is enough to keep them from poking around but then I have the problem of how do my internal users access other user directories if they are chrooted. Do I create a second server without chroot.do I create some weird nested homedir structure..I honestly have no idea how to satisfy both requirements (secure client accounts and privileged user accounts). I need my privileged users to authenticate against Active Directory via Likewise open, LDAP, etc and I don't care how the clients authenticate. Though, I would prefer to have both file and FTP-server level protection just to make sure no one can see the other client's data.
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May 23, 2010
i have GF 6600..when i have install Karmic i was install driver NVIDIA for my GF6600 then finish n restart. but when my CPU booting to Ubuntu..Its Blank..the Driver its not work(Make my Ubuntu Error). Then i Install New Ubuntu Lucid..then i Install the Driver again(i think its will work)...But when i restart n Booting to Ubuntu...Same Error again, The Driver make Blank Screen??
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Jun 4, 2011
Yesterday evening I decided to get Photoshop CS5 working with WINE on my Ubuntu 11.04 install, which resulted in great success. Somehow in the process however, I managed to screw up my GLXDock - it wasn't rendering correctly. Despite numerous reboots along the way it still remained a mess, but I digress, that isn't the issue (just some background info if that helps!)
My motherboard has an integrated Intel graphics chipset. Now, since yesterday evening, I haven't been able to boot into Ubuntu using my nVidia 6600 - which I have been able to do for months previous now. Whether it was something I had changed, or an update that killed it I do not know. Booting normally, it will hang on the plain purple splash screen (not even getting to the "Ubuntu" splash) Even when I boot into recovery mode, the system comes out with a "Bad EIP Value" and hangs but ONLY when I have my nVidia card installed. If I take the card out and boot with integrated Intel, it boots to the desktop by the normal means fine and boots to recovery.
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Oct 10, 2009
If I leave the computer running for a few minutes without doing anything on it, this screen appears demanding that I enter my password, otherwise I can't get back to Fedora. I understand the necessity for this security feature in a work environment, but I'm just a home user and this security screen is just a nagging problem I don't know how to get rid of.
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Aug 31, 2010
I am using debian-2.6.30 After i installing "libkrb53" package, it can not start xwindows any more when I　reboot my system. Just can login and works as a DOS system
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May 17, 2011
I'm using Ubuntu 11.04. In a startup script, I have
Code:
start() {
log_daemon_msg "Starting selenium-server server: "
export DISPLAY=localhost:15.0
/usr/bin/Xvfb :15 -ac -screen 0 1024x768x16 &
From the console, how do I take a screen shot of the display at localhost:15.0 -- my DISPLAY above?
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Jun 22, 2010
I hv PIII 128MB RAM system with Red Hat 8.0. after installation of linux, I got GUI screen..but sometime back, I disabled GUI so I was getting only text mode. I changed some entries in /etc/inittab to get text mode. now I forgot. I want GUI screen again to configure LAN in that system. I changed the setting in /etc/inittab as follows and gave startx command but GUI not coming. id:5:initdefault getting error: fatal IO error 104(connection reset by peer) on X server after 0 requests.
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Jan 11, 2011
I'm trying to run an Xwindow application from terminal but I'm unable to do it. What I did:
Code: oracle@firefly:/usr/local/temp/database$ export DISPLAY=:0.0
oracle@firefly:/usr/local/temp/database$ xhost +
No protocol specified
xhost: unable to open display ":0.0"
[Code]...
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Dec 21, 2010
I run KDE 3.X and for the life of it, can't figure out how to assign the "ALT+SHIFT" to switch between keyboard layouts? The default AL+SHIFT+K switches from EN to second one and after that it (obviously) doesn't work. saw a few posts [URL]....alt-shift.html), but the flag is not changing in the tray.
I also tried to go thru "Keyboard shortcuts", but for whatever reason, it doesn't want to accept the combination of "alt+shift" and expects another key ( i guess).
I'm using Centos 5.2 and the the keyboard model is "MS natural keyboard pro" with US and two Cyrillic layouts - one of them is phonetic.
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Jul 10, 2011
I am trying to install X window on my dedicated server. This is the first time I am doing this and I had several issues which I was able to fix through searching the forum. This is a CENTOS 5.6 x86_64 standard and I am using WHM 11.30.1 (build 1) on it. Through accessing SSH as root I maneged to install X window and Gnome. #yum groupinstall "X Window System" "GNOME Desktop Environment"
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Aug 31, 2010
i want to run a jar file at the start up..and only that application will work at the start up..other all are blocked..after giving input to the application the xwindow will enabled..otherwise it remains same.
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Nov 8, 2010
on a openSUSE-11.3 how do I configure lxde so I can access it via a remote XWindow server via xdmcp?
Entry /etc/sysconfing/displaymanager:
DISPLAYMANAGER="lxdm"
DISPLAYMANAGER_REMOTE_ACCESS="yes"
Entry in /etc/sysconfig/windowmanager:
DEFAULT_WM="startlxde"
[Code]...
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Jan 21, 2010
I am on the admin account of my computer and am trying to remove all privileges from CWD i have tried
chmod go-rwx ~
sudo chmod go-rwx ~
but when i pull up
ls -l ~
It is still showing permission in the g and o column.
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Jan 7, 2010
How can I remove authentication completely from my pc?
How can I edit the files present in the patrician filesystem?
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Feb 28, 2010
Can a virus survive a reformat, running bootrec /fixmbr (both from the install CD), and then installing Ubuntu? Reformat meaning from the windows disk recovery console, using the format command for all partitions. Likewise, would a virus be capable of surviving just the first two steps alone without installing Ubuntu, just re-installing windows?
If one were to have an MBR virus on Windows or Linux, how abouts would you find or remove it without doing an entire disk wipe? And before someone goes "Linux is immune" take into consideration vulnerabilities on the user end.
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Oct 12, 2010
How can I remove this string from all files. I am not sure how it did get there
PHP Code:
<?php /**/eval(base64_decode('')); ?>
I tried this but It did not work
PHP Code:
find . -iname *.php* -exec sed -i 's/<?php /**/eval(base64_decode('')); ?> //g' {} ;
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Feb 8, 2010
I have a Ubuntu file server with a mix of 30+ users ( mix of windows and linux ).All are members of the same group. All need read write create access. I want to prevent deletion of certain key folders. How can I achieve this ? sudo chmod -R nnnn ??
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Apr 7, 2010
I found LKL on my computer. I need to remove it. It isn't showing up in synaptic and i can't figure out how to remove it. SUDO apt-get remove lkl tells me this. E: Couldn't find package lkl. i can't find it with the search and with google.
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May 3, 2010
When I installed, I selected the option to encrypt my home folder. I believe this is causing constant crashes now, since error message is user id/password related. Is there a way to remove the encryption?
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Jul 31, 2010
Is there any way to remove the whole disk encryption without reinstalling? I'm running Ubuntu 10.04.
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Jul 10, 2011
I've installed Ubuntu via UNetbootin from USB on my child's computer. It comes by default with the sudo command which I find really annoying to work with. I'd rather have my su command.
Now, while googling for a removal instruction, I've read that the sudo command is tied to system functions on some Ubuntu live systems and can't be removed easily. Does anyone know if this applies to the 10.04 live version used by UNetbootin and how to work around this problem?
If not, is it simply enough to remove 'sudo' via the software center? I find many tutorials on how to switch from su to sudo but not much about the other way around.
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Jan 1, 2010
I installed Ubuntu 9.10 netbook remix on my Acer Aspire One D250 computer. The broadcom wireless NIC succeeds in connecting to the network but only if I remove the WPA-PSK security in the Netgear router settings. What do I need to change in order to be able to secure my network?
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Apr 2, 2011
I can't seem to remove rights for a remote root connection. Below you can see that the rights are present before and after the successful revoke command. I am using the correct command.
[Code]...
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Jan 20, 2010
I've searched the forum, but nothing answers my question. We know the security risk posed by suid, sgid.I'm looking to remove the suid bits from all programs that do not absolutely need it.
This command:
find / -type f ( -perm -04000 -o -perm -02000 ) -exec ls -lg {} ;
gave the list below.
For which of these programs can I safely remove the suid bit? I don't want to break my system by modifying a program that the system needs.
-r-sr-xr-x 1 bin 502172 Jan 10 12:36 /usr/local/bin/dccproc
-r-sr-xr-x 1 bin 186683 Jan 10 12:36 /usr/local/bin/cdcc
-r-s--x--x 1 root 23980 Nov 17 00:27 /usr/lib/virtualbox/VBoxNetDHCP
-r-s--x--x 1 root 9896 Nov 17 00:27 /usr/lib/virtualbox/VBoxNetAdpCtl
-r-s--x--x 1 root 23976 Nov 17 00:27 /usr/lib/virtualbox/VBoxSDL
[Code]...
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