Fedora Security :: Remove Nagging Security Screen?

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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Ubuntu Security :: Startup Login Screen Security?

Aug 27, 2010

just migrated to Lucid from Jaunty and noticed that the login startup screen looks more like windoze (shows all authorized users).One of the endearing security checks with Unix was that if you had access to a console you had guess both userid AND password - the system wouldn't tell you which was wrong.I feel that we have lowered security by making the list of authorized users visible on a console. Is there any way to turn it off and force users to enter both userid and password?

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Fedora Security :: Remove Encryption From An Hard Disk?

Feb 24, 2009

I was trying to install Fedora 9 on my new laptop that came with Win XP. I have selected the option to wipe out all partition and create a default layout with the Encryption option selected. But that installation got stopped on the middle, therefore I have started the installation again. This time it asked for the encryption password as expected but don't know why, its not accepting my password. I am 100% sure that the password is correct but it is not allowing me to enter into the hard disk partition section.

My question is, how do I remove encryption from my hard disk? I don't need to preserve the data, I just need to use my hard disk again. Is there any boot CD that allow us to format encrypted disks without prompting for a password?

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Fedora Security :: Remove Boot Mount Of Dm-crypt LUKS Md1?

Dec 22, 2009

When I upgraded from FC11 to FC12 of the encrypted raid partitions started to request password on boot (in FC11 not having references to encrypted md1 in fstab and crypttab, was enough for FC11 not to ask for passwords on boot) despite the fact that I removed /etc/crypttab and there is nothing in /etc/fstab relating to encrypted md1 (raid array). I want my machine to boot w/o asking me passwords for encrypted devices, and I will open and mount them myself manually after boot.

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Fedora Security :: Script To Add Security Spin Tools To Normal Installation

May 22, 2011

love security/pentest tools. This script adds ALL the tools from the Security Spin, plus Metasploit. Feel free to modify it if need be.

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Fedora Security :: Wierd SeLinux Security Alerts \ Got:Code:Summary: System May Be Seriously Compromised?

Apr 13, 2011

this is the allert i got:Code:Summary:Your system may be seriously compromised! /usr/sbin/NetworkManager tried to loada kernel module.Detailed Description:SELinux has prevented NetworkManager from loading a kernel module. All confinedprograms that need to load kernel modules should have already had policy writtenfor them. If a compromised application tries to modify the kernel this AVC willbe generated. This is a serious issue.Your system may very well be compromised.Allowing Access:Contact your security administrator and report this issue.Additional Information:

Source Context system_u:system_r:NetworkManager_t:s0
Target Context system_u:system_r:NetworkManager_t:s0
Target Objects None [ capability ]


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Fedora Security :: What Security Measure's Should Be Taking To Make Box Little Less Vulnerable?

Apr 7, 2009

I'm just curious as to what security measure's I should be taking to make my box a little less vulnerable? I'm still experimenting/playing with Linux, use the net, IM, download this and that and was wondering how secure fedora 10 was out of the box?

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Fedora Security :: Security Risk Of An Unencrypted /boot Partition?

Apr 8, 2009

During a recent install I made the leap to encryption,but /boot must remain unencrypted.Is there really any legitimate security risk to having an unencrypted /boot partition? I mean basically someone can just see what kernel you're running which they could see during boot anyways right? Oh I and keep all my financial documents in /boot/finances/ (haha ok not really, but I am serious about the first part).

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Fedora Security :: Install Security Lab Menu On A Normal 13 Installation?

May 30, 2010

Is it possible to install security lab menu on a normal Fedora 13 installation? I don't want to use security spin.

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Fedora Security :: Log In Screen - Not Show Name?

Dec 23, 2009

My question is related to the log in screen in Fedora 11, Gnome desktop, installed on my laptop. I currently have an account with the name Octav. When my computer starts-up i have a window with <my name> and <other> showing to choose from. When i click on my name, i type my password and i'm logged in.

Now my question, can i have my log in window, without my name written there, so i have an extra security if i may say. What I want is for me to type my username and then password to log in. I don't want my name been written on the screen.

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Fedora Security :: Set Conditions To See Logs Of All Security Intrusions

Jul 19, 2011

I just putup the fedora15 on my PC. there are several msg coming up from selinux saying permission denied, though I am not doing any administrative activity. the PC being a workstation for reaserch. how can I know the denial is for an security intrusion attempt. how can I set conditions to see the logs of all security intrusions. how can I set exclusive msg-ing from selinux that the denial is for a security intrusion attempt.

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Fedora Security :: Hide Username In Login Screen - GDM

Jul 29, 2009

Is there any way to hide my username in login screen (GDM)? I ask this because in Ubuntu I have seen that you need manually enter your username.

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Fedora Security :: Still No Security Patched Firefox 3.5.1 In Yum / Get That?

Jul 18, 2009

Firefox 3.5 has a critical java script vulnerability as noted in the recent news. I had to manually update to 3.5.1 using the mozilla tarball because there's still no Firefox 3.5.1 in Fedora Updates or even Fedora Updates Testing repositories. Is this normal? I didn't want to resort to using the mozilla one because now I can't use flash (my system is 64 bit and mozilla only seems to offer a 32bit tar file of Firefox) and having two Firefoxs means dealing with the ProfileManager, separate bookmarks and so on.

I'm trying to find out if I'm just looking in the wrong place, I tried the normal mirrors for "updates" for Fedora 11 and then updates-testing and also the baseurl for "updates" to get rid of the mirror update delay. None of them seem to have 3.5.1 ?

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Fedora Security :: Backwards Security - Networking ?

Aug 3, 2009

Problem that may require several tools available on Fedora. I don't know if its possible or not.

Given: Surveillance video box based on Fedora & Zoneminder. Internet connection is via a private 10.x.x.x network connection to the local phone company/ISP. That's the only connection available and they are the only ISP in the area. The ISP uses NAT to ultimately provide a routeable IP address, but that only works on outbound initiated traffic.

Problem: How can someone out on the Internet hit this box? i.e Is there any way to rig a method that will ultimately allow a connection initiated from the Internet to see the surveillance video that this box has stored via an http session?

I thought of one idea but don't have the tools to implement it. User sends an email to a server out on the Net somewhere. Surveillance box retrieves mail ever minute. The mail contains the users IP address. Surveillance box sends an outbound packet to that IP address to get NAT functional. The users box then uses that address to hit the box on the private network. The snag with this is that NAT is specific to ports, and I have no sway over the ISP's NAT capability.

Is there any way to push an http session outbound to the waiting end user? i.e. initiate a push of http traffic from the private box to the end user?

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Fedora Security :: Personalize Fire Fox Security

Nov 24, 2009

Does any one knows how to set an schedule for fire fox to terminate loading some IP. or restricting people to accessing some websites from your system..?I mean to set some restriction option to Fire Fox for third party..

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Fedora Security :: Gui Ids - Display A Quick Little Notification On The Bottom Right Hand Corner Of Screen

Apr 6, 2009

I might get harassed for making this windows/linux comparison, but i'm seriously wondering why i cant find any application that can display a quick little notification on the bottom right hand corner of my screen whenever there's some intrusion attempt.

For example, sometimes I can see that in my /etc/logs/secure (or something like that) there's someone who's trying to attempt to connect to me using random usernames/passwords from different servers. The only time I know this has happened is when i actually open the file with gedit. Is there anything like (norton for windows) that can display little notifications (with or without eye candy)??

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Fedora Security :: Maximize Security On An FC 10 Box?

Aug 26, 2009

I would like to maximise security on an FC 10 box. I had come across some scripts that perform a host of security tests and let me know recommendations on what all needs to be done. Dont seem to remember what they were called. Has any one tried any such stuff on FC10 recently? which scripts or suites you would recommend for this purpose...

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Fedora Security :: What Is In Security Update?

Jan 5, 2010

I was reading that Arch does not provide security updates, but just provides security by keeping with up-to-date software...So what is in a security update and what does it patch? The kernel?

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Fedora Security :: FYI Security Spin ?

Mar 2, 2010

FYI Security Spin.


"...The Fedora Security Spin provides a safe test environment to work on security auditing, forensics, system rescue and teaching security testing methodologies in universities and other organizations. The spin is maintained by a community of security testers and developers. It comes with the clean and fast LXDE Desktop Environment and a customized menu that provides all the instruments needed to follow a proper test path for security testing or to rescue a broken system. The Live image has been crafted to make it possible to install software while running, and if you are running it from a USB stick created with the LiveUSB Creator's overlay feature, you can install and update software and save your test results permanently..."

About Security Spin -


Available Apps of Security Spin -


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Fedora Security :: Security Spin Pen Through SMB

Jun 3, 2010

Using SMB to access a windows machine through port 139/445 is great, but how can this be used to exploit the system?I know this is gonna get flamed for the nature of hacking, but i'm trying to pen my own windows box with my sec spin of fedora (tried backtrack but didnt like the feel of it, so got the GNOME-security spin)I'm trying to find a way to open up c$ without sitting at my win box and sharing it.

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Fedora Security :: Securing Security Lab

Jun 29, 2010

I ran the LiveCD of Fedora SecurityLab and noticed these ports open, 111,631, 34526.How can I close them and what runs behind them. I know 111 is rpcbind, 631 ipp and 34526 is unknown.

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Fedora Security :: Most Used Apps - Security Lab - FSL

Mar 31, 2011

I just preparing some presentations and was wondering what the most interresting Tools on the FSL would be. There are many, many everybody would use, but what would be the lets say "most wanted" Tools on the fedora Security Suite aka FSL?! Without what Tool you could not work?

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Ubuntu Security :: Remove All Privileges From CWD?

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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Ubuntu Security :: Remove Authentication Completely From My Pc?

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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Ubuntu Security :: Malware + MBR - How To Discover/remove

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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Ubuntu Security :: Remove String From All Files?

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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Security :: Remove The Suid Bits From All Programs?

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


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Security :: Remove Access To MOST Of These SUID Binaries?

Mar 16, 2010

I say to remove access to MOST of these SUID binaries? do they all need this power? what i want to do is minimize access just incase one of them gets an exploit(as ive already done for apache SuEXEC)


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Security :: Using Sed To Remove A Line From All Files In Directory

Jan 23, 2010

A Javascript has crept into all my hmtl, php files in my shared hosting account. I have SSH access.How can I use sed to remove that line from all files in a directory recursively ?sed doesnt change the original file.And I need to specify *.php and *.html

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Ubuntu Security :: Remove Delete Permissions On Certain Folders?

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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