Ubuntu Security :: Creating PPK File Using Puttygen - Private Key Not Loading
Oct 12, 2010
I am trying to use puttygen to create a ppk file that I can use with putty. I try to import the private key and it gives me the error: Couldn't load private key (ciphers other than DES-EDE3-CBC not supported). Now I obviously know this is telling me that I have the wrong cipher, but what what do I do to use the correct one? Here are the instructions that I used to create the keys.
Also, when I open the key this is the top:
- BEGIN RSA PRIVATE KEY -
Proc-Type: 4,ENCRYPTED
DEK-Info: AES-128-CBC
and then some other stuff that I don't think I should share. But the weird thing (to me atleast) is that it lists CBC right at the top there which is what puttygen wants. Why won't it accept it?
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Aug 18, 2010
i noticed that all files can be seen by another computer if the drive is accessed
can I stop this? can i set a private folder?
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May 15, 2010
jump into a Linux class in college with only 3 weeks left in the course. I thought I would be able to catch on, and go figure, it didn't exactly happen that way. I was given an assignment to do, and I am so far lost it isn't even funny. I need to create a directory structure, set up file security, create a step by step instruction manual on how to copy/delete said files, and create a guide to common Linux commands. How would I create these files in root and share them with the other users? and where can I find a list of common commands and their functions?
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Jan 25, 2011
One of my clients is considering implementing GPG or a similar technology to encrypt internal emails. (They have a different system in place already for external mail.) I've done some reading on the subject but can't seem to find any information about how one might set up a keyserver. All the discussions I've seen so far talk about uploading the public keys to a server like keyserverDoes anyone know what software packages might be used to set up our own private keyserver on a Linux machine?
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Apr 17, 2011
Some people have said that it's dumb to use the same key for multiple things, but for curiosity's sake, is it possible to convert one's private key to id_rsa? I know that I can convert my public key to id_rsa.pub with ``$ gpgkey2ssh [key ID] >id_rsa.pub'', and that makes me think that there should be a way to do it with my private key.
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Mar 18, 2011
When you install sshd and run it with no modifications, then any other machine can connect to your machine without specifying a key. How does this work? Some key is being used, correct? how does the client know what private key to use?
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Mar 26, 2010
At the moment we have one SSH server with the private key being on a usb flash drive, and the public key being on the server in authorized_keys2. Now that three more servers are coming online, should we generate new keys, so we have muliple private and public keys (one pair for each server), or use the same two keys to access all the servers
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Oct 12, 2010
I have a seperate partition for my "/home" folder. Whenever I install a new distro I format my "/" folder.
This way I was able to access my old home data files since I install using a different username. Everything worked fine until last Sunday.
10.10, unlike other versions of ubuntu, has encrypted my old username in my home folder.
Then using this document [url]
I was able to mount my hard drive again. But all the file and folder names are like this.
Btw I don't remember selecting an option to encrypt my old home directory in the first place, what is this ?
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Dec 10, 2010
Long story short: I opted to encrypt my home, enter the passphrase and soon as I log out and rebooted, I got stuck with a message about /var/lib/ICEauthority file and other messages. So I've been trying to fix one issue at the time. The bottom line is that I'm trying to get to my private folder. Dropped in recovery mode:
[Code]...
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Feb 18, 2010
In my ~/.ssh I have a number of public keys and one private key (id_rsa). How can I verify which one makes a pair with the private one.Or, can one generate the public one from the private key (in reasonable time)?
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Mar 22, 2011
Quote:One of the new features in Firefox 4 that we are very excited about is Content Security Policy, which is a mechanism that works behind the scenes to prevent some of the more severe web-based attacks against users and websites.Firefox users don?t have to do anything in order to gain this protection. Simply install Firefox 4 and you will instantly receive all of the benefits that Content Security Policy has to offer. Easy!
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Sep 17, 2010
I'm running Karmic Koala on my laptop and I'm attempting to connect to my university's secure wireless network. I was directed here by the university's computer help websiteI've followed all the steps, but when I open the wireless network authentication applet and try to browse to my private key, I can't find it. The "chose your private key" window claims to be looking for "DER, PEM, or PKCS#12 private keys (*.der, *.pem, *.p12)," and while my private key file shows up as a .p12 file when I open that location with my file browser, the file doesn't show up when I try and browse to it from the authentication applet. I've attached an image which shows the file in one window, but not in the other f clarification.
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Aug 8, 2011
I'm a absolute "server- noob" but I've got some experienced with desktop linux and want to build my own file server to access my stuff over the internet. I'm using dropbox for a while now like a cloud drive by simply mounting the "private" folder (which I encrypted with encfs/BoxCrypt) in order to cross-platform use important files. The problem is that Dropbox only provides 2 GB for free and I don't know how secure my data is up there. Moreover I don't wanna always sync all files locally.
I got an intel atom machine standing around and so I want to build my own file server to provide the same or at least a similar service.
1. Which type of server application provides a "network drive" that computers (several users) from the internet can access?
2. What's the best way to encrypt my data and transmission in order to make the system absolutely unattackable/unreadable from outside?
3. Is there a service that can provide a dropbox-style sync mechanism?
4. Which distro should I use? I'd prefer a non-desktop enviroment solution but never had anything to do with it. Is that possible for an average linux user?
I'm aware that this solution won't be very fast because of the limited upload of a standard internet connection but that would be ok! It's more that I want to have the possibiltiy to access all my data as a thin-client anywhere, anytime on any machine and still be on the safe side. I know that this is some kind of contradiction but what would be the best compromise? I know some questions may sound stupid but I really never had anything to do with servers at all in the past...
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Jul 25, 2010
I downloaded three iso-images, 1 dvd-image and 2 cd-images:
openSUSE-11.3-DVD-i586.iso
openSUSE-11.3-GNOME-LiveCD-i686.iso
openSUSE-11.3-KDE4-LiveCD-i686.iso
Being paranoid, I created iso-files from the burnt DVD-R and the two burnt CD-R to verify integrity.
The iso-file of the DVD-R was identical to the downloaded image. Both iso-files created from the CD-R were different in size.
The original size of openSUSE-11.3-KDE4-LiveCD-i686.iso is 719.323.136 Bytes.
I only got 718.938.112 Bytes when recreating an ISO-file from my CD-R.
The CD-R is from Sony. When the length of my ISO-file doesn't correspond to the downloaded one, the checksum file verification doesn't work.
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Feb 5, 2010
I am interested in creating a photoblog on Wordpress. Before I jump in I thought it would be wise to ask a few questions here first rather than getting into trouble and then firing absurd questions left and right. I am not very experienced regarding servers but not afraid either I was reading How-to's online reagarding installing Wordpress on Linux [url] and few questions came to mind :
1) Like any other server, does the computer that will run Wordpress have to be up and running for 24/7?
2) Since I will install Wordpress on a desktop, should I be concerned about my machine being compromised? I am not an expert on internet security so this is a big concern of mine.
3) Is it a good idea to install Wordpress on a personal desktop at all? Does running Wordpress from a different partition of the hard drive (if it is possible) help at all.
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Mar 25, 2010
I am at my own desktop and I have root access on my own desktop.
I also have root access on a Desktop Ubuntu system (192.168.5.10) on the LAN. I need to create another desktop user account on that 192.168.5.10 system.
So I logged into that system with: ssh -Y myself@192.168.5.10
Then I did: sudo users-admin
This brings up the Users Settings but the Add User and Unlock buttons are disabled. How do I enable these buttons?
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Feb 21, 2011
I am looking at creating two user accounts for "contract system admins"..These guys will be performing sys admin duties for a sever -- however, I am still concerned about security of data. For example, the server contains password information for our database, etc.Besides making them sign an NDA, etc. what other security mechanisms could I put in place to ensure that they don't just go buck wild. For example, when someone makes a sudo command, is this logged?
what are some recommendations for general security practices?
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Aug 10, 2009
I am working to create a new base image for our RHEL5 setups, and I wanted to make sure we are creating a functional, but secure, image. Can anyone point me to some writeup's that might provide some illumination on this potentially daunting task? Basically, I'm concerned about what packages are okay, which should be avoided, and what other caveats that I might not think of when putting this together.
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Feb 22, 2011
I'm trying to set up a firewall at the moment that allows access to my custom SSH port from only my friend's url (they have a static url but dynamic IP). I find iptables a bit of a nightmare and was hoping to use UFW for most of my day to day firewall maintenance and just make a few extra iptable rules to cover exceptional circumstances like this. Fortunately it seems UFW allows this with /etc/ufw/before.rules and /etc/ufw/after.rules. So at the moment I'm just trying to get the basic iptables rules right. As I say I'm not very good with iptables, does this look right?
Code:
## Drop Default SSH port access With Logging
iptables -N SSH_DEFAULT
iptables -A INPUT -p tcp --dport 22 -m state --state NEW -j SSH_DEFAULT
[code].....
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Sep 14, 2009
error message when I ran my program that I couldn't open my local file. I have two files first one is called client, second one is called server I am using named pipes to sent a message from client to the other file called server in client I used mknod() to create the two named pipes,one for read,one for write and created new thread in client using fork() spawned a child process that executed the server file both named pipes are opened the client file got the message from the user and sent it through the named pipes to the server file when the server receives the message , it needs to verfify it is correct in the server file, a local file descriptor is created to read and send this verifing message when it is not correct but I am getting an OPEN() error when I tried to open this shared local array buff and attach it to a file descriptor where the message is kept why do I get this error in server file
int main()
{
/*both named pipes are open*/
rfd=open(IFIO1,0);
wfd=open(IFIO2,1);
[code]....
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Dec 28, 2010
I have been investigating some security precautions over the past several months. I use Ubuntu now instead of windows and FIrefox browser also. I have installed BetterPrivacy, WOT, NoSCript and a few other add ons. I have SELinux, ClamAV, AIDE, and chkrootkit installed for Ubuntu.
When we browse certain web sites, we get an error about the server being reset. However, when I put the Ubuntu install cd in and browse with Firefox, obviously with no add ons or settings changed, we can browse to the site with no problems. We are trying to be secure on the internet and I don't want to lower or get rid of any of the settings / add ons we added. What would cause servers to reset when using Firefox / Ubuntu with browser add ons / OS addons?
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Mar 18, 2010
I have been using a boot disk with a kickstart file that calls rpm files that are on RHEL4.8. The rpm files tk-devel,tcl-devel,nss-devel and nspr-devel respond back during the install of RHEL5.e with a pop-up saying they do not exist,but when I look on the RHEL5.4 DVD they do exist in the Workstation directory.
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May 2, 2010
I bought a new SD card which I intend to put some MP3s on - except that I can't write to it because it tells me the destination is Read Only. No-probs thinks I: I'll just reformat it.
"Error creating file system: helper exited with exit code 1: cannot open /dev/mmcblk0p1: Read-only file system"
Various chmod commands all result in Read-only file system. I tried umount then mount commands, but it couldn't find it to mount once I'd unmounted it using the same /media/ file path (I assume it's the only one).
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Jan 15, 2010
how to install libxcb-xlib.so.0?When I start one software and it complains that
"error while loading shared libraries: libxcb-xlib.so.0: cannot open shared object file: No such file or directory"
I have lastest libxcb1 installed and searched in my system but didnot find a relevant result.
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Jan 17, 2010
I installed the latest Gimp beta and it worked fine but then I couldn't open it. I removed it and I reinstalled but it didn't work, so I installed the latest stable version (no beta) and it still does not work, when I open it form Terminal, this is the response:gimp: error while loading shared libraries: libbabl-0.0.so.0: cannot open shared object file: No such file or directory
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Jul 14, 2009
I can't locate any PHP 5.3 rpms but before I compile it from source, is there a way to create my installation option and save it into a RPM? I have a handful of servers I would like to install PHP on, but it would be so much easier if I could just do an "rpm -ivh"
I google and found instructions on how to build from tar.gz files but what about the options I set on the CLI?
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Nov 14, 2010
I am pretty frustrated with Ubuntu security partially because I don't know exactly how to fix things in it like I do windows and you can't always use GUI with Ubuntu which is quite annoying. Basically.. I created a samba share. When I copy files from my Windows machine TO the Samba share the permissions are always screwed up. I can watch the videos but I can't delete them. I have to go into Nautalis? via F2, sudo something and change permissions everytime I copy something into the shared folder. To me, this is stupid.
Another issue... I added a 2nd hard drive to my Ubuntu machine, shared the entire drive. Once again.. when I copy files to the share I can only read them.. I have to keep stealing ownership so to speak over the files. Now, when I want to CUT and PASTE from my Drive "C" Ubuntu to my Drive "D" I dont have access. Ugh... why can't there just be a way to make all files accessable.
Why should I have to pop into a different program to regain permissions everytime. When I create a folder it should STAY that way. Anything I copy into it.. its MINE. Just because I copy from another machine onto THIS machine, I am still the creator of that folder. I SHOULD have access to EVERYTHING in it.
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May 14, 2010
I upgrade the system from 11.1 to 11.2 seems everything work fine, no error no warning, after a reboot the consol show : mount error while loading shared libraries: libvolume_id.so.1: Cannot open shared object file: No such file or directory. when I try to repair the system the repair tool cannot find the root partion,
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Jan 22, 2010
I am running Ubuntu 9.10, I have Wine installed. I wish to load the file 'NoteTabPro' an .exe file into Wine, but am unable to do so. The NoteTabPro file is in my Desktop area, downloaded from Fookes software; was told it would load automatically into Wine (as the trial version did, and the NoteTabLight version), but it did not? How do I go about doing this please? I know that it can be done, I just haven't found the right buttons to push.[URL]..
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May 19, 2010
I'm running karmic koala 9.10I installed cups-pdf and it now shows as the default in my printer list, but when I choose the file type drop down from the printer dialog box it only has ps as an option so when I save it I end up with a post script file not a pdf.
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