Fedora Security :: Locekd Local Password?
Sep 2, 2009iam new in linuxi put check on locked local password and now i can not log in if i put my password
View 4 Repliesiam new in linuxi put check on locked local password and now i can not log in if i put my password
View 4 RepliesI have setup a nis server and client. At first I didn't have a local user defined on the client. The client then used the user and passwords from NIS, so that was ok.
The problem then is, that when the server is down, I couldn't login to my client anymore. So I created a local user with the same name on the client but with a different password (after I shut the nis server down, if nis server was on, I couldn't create a local user with the same name). I then edited etc/nssswitch.conf as follows:
Code:
# (like no NIS server responding) then the search continues with the
# next entry.
#
# Legal entries are:
#
# compat Use compatibility setup
[Code].....
If NIS server is on: client has to login with the nis password If NIS server is down: client has to login with the local password (as fallback)
However the actual behaviour is that I can only login with the local password now. The NIS pasword doesn't seem to be used anymore.
Simply, the number of possible combinations of passwords increases as an exponent of the number of characters used and as a factor of the number of characters available for use.
26 potential characters for a 2 character password results in 26^2 possible password combinations. This means that each new character added would result in an "order of magnitude" increase in the difficulty of brute force attack.
Using a phrase, complete with punctuation and capitalization is the very best mnemonic device to remember a password. Consider this, how hard is it to remember; The quick brown fox jumped over the lazy dog.
Than it is to remember, l33tsp34kp@ssw0rd
If we pretend that both of these passphrases are generated from a character set consisting of 26 characters, the first would be one of a possible 15274273784216769021564085930704478424313742483024 510976. The second would be one of a possible 1133827315385150725554176.
In short, use a passphrase not a password, they are much MUCH more secure.
I tried the following instructions to set up "ssh without passwords". But this didn't work.Could someone please tell how to debug this.
View 11 Replies View RelatedI just installed Fedora 10 on my laptop 2 days ago. I dont seem to remember the password i userd for my username. Is there a way to reset or change the password? I cannot login to the system.
View 4 Replies View RelatedI want to change the password complexity how do i do this?
View 9 Replies View Relatedwhat does one do when he forgets the root password ? i still have a terminal logged in as root how can i change the password in terminall
View 2 Replies View RelatedWhen I installed Fedora selected the option to encrypt the hard drive. I want to change the passphrase, is there a way to change the passphrase, or do I have to re-install Fedora?
View 3 Replies View RelatedI have been experiencing harassment with my websites being hacked so pardon me if this is an over-paranoid question.
Just recently started on FC11 after having abandoned Fedora for CentOS for a few months. So glad to be back, but...
I have been getting notices about security updates. When I click for the update, I am not asked for the root password and the update occurs.
I create music and usually gets sold world wide. I have some distributors that have been able to access a private server and get the new tunes I make to download via ftp. Well that server is getting full and I was trying to create another directory on my website itself.I created the directory. made the ".htaccess" file. Then I tried to make the htpasswd file but my server just keeps saying no command by that name.
View 8 Replies View RelatedI use Fedora 12 AMD64 , my Fedora mount automatic windows partition , I try find way Fedora dose not this you can see in this linkSo I want set password for windows partition and I do not want somebody can see what I have in windows partition , if I can not set password for partition , I want set password for folders are in windows partitions , can I do this ?---------- Post added at 05:25 PM CDT ---------- Previous post was at 09:29 AM CDT ----------
View 1 Replies View RelatedI want to enable sshd from Internet, but I want to secure it as much as possible.Therefore, despite the fact that the service will run on a tcp port above 2000 to prevent most scans, I would like to :- First, force the use of a client certificate, to avoid brute force attack on my users/passwords- second force the use of a username/password to avoid someone having access to my system just by stealing my key..When I look at the configuration, it's possible to enable both, but one of them is sufficient to login, but I can't find how to make them both mandatory...
View 2 Replies View RelatedIt seem like unix abit annoying every time you log in you need to password can I disable it
View 10 Replies View RelatedI have F10 installed on my laptop with disk encryption enabled. When I boot the machine I get a "Password:" request on screen but can't start typing for 30 seconds or more.Presumably the OS is not ready. This means I have to wait at the keyboard tapping a key until I see asterix. It's a waste of time and frankly a bit clunky for a modern OS. How can I change the behaviour so that the "Password:" request only appears when I can actually type?
View 4 Replies View RelatedI'm not necessarily gonna do this, but I have to know. Is there a way to make the system not complain about every single freaking password you try to use? Make it so that any regular user could make "hello" their password without complaint? Like I said, I won't necessarily do it, but I have to know if it can be done.I did some searching and found the su -c "passwd username" trick, which is working for right now (I have root access but a user account I made for a friend doesn't)... it's just irritating when it won't even let him use something like "snuh123" because it seems to think it's based on a (reversed) dictionary word. Any use of a dictionary word, even with other chars, fails
View 6 Replies View RelatedI was wondering how to password protect certain file folders?
View 6 Replies View RelatedCan't seem to do it, wondering if anyone knows how? Normally there's something in sshd_config that can be switched to true or yes to allow root login but I can't see it in fedora 12.I can login via root at a terminal no problem, just not via ssh, I get access denied every time. Also, I need to login using password authentication.I've done: 227169 but that's just for GUI which I don't really need since I rarely ever log into the GUI.I have also searched through here and mostly only found info such as above, how to enable root login for GUI, or billions of posts about how logingin as root is bad but I cannotswer to my question.DISCLAIMER: Please do not reply to this thread if all you can contribute is the question of why I need root or to put some message telling me I can do everything using su, etc, etc. Please only contribute if you can answer my question. A: My machine and a valid quesiton. B: Spirit of Linux is open, not restrictive
View 3 Replies View RelatedIt does happen occasionally that I type a password in the wrong place or at the wrong time when I'm working with multiple terminal windows. It's not a frequent occurrence but sometimes it does indeed occur (most recently as an argument to g++ instead of the password prompt to scp).Would you guys consider it adequate to clear the view with "clear" and the history with "history -c" or should I change my password after such a mishap? I realize that this should probably not be a problem with my computer at home as I'm the only user but when I log onto school (where we mostly use ubuntu, solaris) would the same precautions be enough?
View 4 Replies View RelatedSometimes when I try to open some chat application i get a strange warning message asking for password. The message is that /usr/libexec/mission-control is trying to gain access of the system, please provide the password. On top of the message box it shows "Unlock Keyring".
This very weird, as I am also unable to do a print-screen when this message box is up.
what this message is all about and what does the executable /usr/libexec/mission-control do?
I am using Empathy as my chat application
I have a problem with my fedora workstation.I am trying to change my ldap user password through passwd command.When I first create the user on ldap server, I use md5 and create the user password.This is the entry:
Code:
dn: uid=boo,ou=People,dc=linux,dc=gettolandia,dc=org
uid: boo
[code]....
This used to work in Fedora < 15. Whenever I want to send an e-mail using Gmail's SMTP server for the first time in a given session, the KWallet system asks if I would not rather migrate the password and store it encrypted inside a wallet. Every time I concur and every time an error message pops-up, as soon as I try and send another e-mail. The attached snapshot shows the error message I get. It doesn't matter how many times I select "Store Password". Every time the ordeal is the same. Up to Fedora 14 this method worked all right, but now it fails.
View 1 Replies View Relatedeverytime i try to vnc to my box, it pops up the keyring authentication, which is obviously a huge problem when logging in remotely.how do i change my keyring password to match my login password?
View 4 Replies View RelatedI have recently installed Fedora 14 on a new computer we presented as a gift to my sister-in-law. She is new to Linux. Although I've used Fedora since Core 1, I'm no expert on security issues, and this baffles me. She's doesn't know how to change the root password, so why doesn't it work any more? She discovered the problem when attempting a yum update from a terminal.(1) How could the root password have gotten changed? How likely is it that someone got onto her system through ssh, made a lucky guess on her root password, and then changed it? Are there robots that do this?
(2) The firewall is enabled. I have it set up as follows: (a) under "Trusted Services," only ssh is checked (I need to be able to get in remotely this way); (b) under "Trusted Interfaces," I have eth0 checked (I need to be able to use VNConto her desktop).Question: Are these settings giving ample protection? What settings would be recommended to protect her system while at the same time allowing me to access it through ssh and VNC?
I want set password for some folders in Fedora 12 and someone want open them it need password , How I can do this ?which application can do this for me ?
View 13 Replies View RelatedI know this has probably been asked too many times here but I need to secure my emails. Personal matters of course. But yeah. I use the program "Password and Encryption Keys" to generate a key to sign my emails with but I do not know what to do. To be blunt, I'm stupid when it comes to this. IF not, steps in creating a key? and giving it (my public key) to the significant other? Finding where both keys are? Implementing it into Thunderbird? If it helps any here's some extra information: Ubuntu distro: Ubuntu 10.04 Email client: Thunderbird
View 7 Replies View RelatedHow can I force passwd to use a simple password?I want to change my passwd & delete passwd history (if stored).I plan on creating a Virtual Appliance that uses another password besides my testing password.
View 5 Replies View RelatedI have a database created by an older program (not Access) that I need to open and retrieve information for my business. The manufacturer put a password on there so that only it's program could open it. I do not use that program, but it has information I need. Is there a way to find that password or circumvent the password altogether?
View 1 Replies View RelatedI've been trying to write php or perl code to generate the sha-512 password hashes in fedora. I've been unable to do the hashing which is encoded in the shadow file on fedora core 11. Does anyone have php or perl code which provides the hashing algorithm. (All of my attempts result in the encrypted hashing being longer than 86 character -- the length that crypt says the sha-512 should be)
View 3 Replies View RelatedI already posted a topic similar to this concerning the Desktop OS version, but this deals with the Netbook because unlike the Desktop, the Netbook is less cooperative. Allow me to elaborate: Today (or rather yesterday since it's not after midnight where I am), I changed my password because I was hopelessly confounded about how to get my Wireless Network card up and running after it had been installed and I was allowing my dad to use it. This issue has since been resolved, however...
When I chose my password during the original installation, there was no mention of it being "too simple." This is where the Desktop OS and the Netbook OS differ. The desktop will let me change it in the terminal without any errors. The Netbook will not. When I've attempted to revert it back to the original, it will not let me do so in the User Profile or in the Terminal. The Passwords and Encryption Keys application also does not appear to help.
So now even after I've changed it to a different "complicated" password I am still prompted to insert two different passwords since I changed my user password but I am unable to change the password I input during the installation. A bit screwy methinks. This is extremely important. I'd like to know how to change the original installation password.
If I can't change the main password on my laptop then this is a serious potential security breach just waiting to happen (especially since it's on a laptop and I will be hauling it around with me) and I will most likely install a different OS if this isn't resolved --- It would be very unfortunate since I spent the whole day fixing it and I really enjoy the interface. Luckily I can live with this on my Desktop since I'm not going to be hauling it around with me everywhere when the school year starts.
Being able to reset the root password by booting into single usermode by editing grub. This is a MAJOR flaw. I know it makes no real difference against internet bourne attacks, but even so I must say I found it shocking. The only way I've found to stop this is to encrypt the entire HDD, so noone could get into single user mode without first knowing the encryption key/password.
View 14 Replies View Related