Ubuntu Security :: Security Annoyances With File Sharing?
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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Jul 29, 2010
How does network file sharing work in Ubuntu? Is it only enabled for the Public folder? Or does it vary by folder permission settings, specifically in that folder's 'Properties' and allow others access the folders?
I'm asking because someone at my work may have had a complete breach of their personal files in the /home/ directory from their folder permission settings. I want to know if regardless of everyone having access permission to the folder, if they need to drag it to the Public folder for it to be network shared.
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Jul 11, 2010
I seem to be missing a secure.log or security.log file. I have Ubuntu 10.04 and can't find this file. I looked in the /var/log and ran a search command to no avail. Does anyone know where this file is or is it called something else. I'm looking for a file that logs any change to the security settings of the system.
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Dec 3, 2010
i use Linux centOS5 for server in which a drive is shared on windows users by which they can create,delete and modify the folder and files, means they have full access. i want that a drive is share in which they will create files and folder on them but not delete and modify them how to set permission and share that drive on windows users so that my problem will solved
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Dec 6, 2010
Is there software or mechanism that can help the administrator determine if more than one person is using the same user account via a shared password?
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Feb 2, 2010
I have several Proxy severs set up at our business. I always do the same basic config, except for my version of Fedora (I always grab the newest).
I put 2 nics in a machine Load Squid, Dansguardian and Firestarter. I use Firestarter to direct the surfing traffic from my LAN out a cable modem that I have for each store. This lessons the bandwidth on the T1.
Easy enough. My problem is Firestarter has always been a little flaky. But as of F11 the gui wont stay up for more than a few minutes at a time. It still functions, but you have to be quick if your going to use it because it will inevitable crash.
So I suppose it's time to start doing this the correct way and using IP Tables. Does anybody have a resource they can point me to that will help me understand how to do this? It looks like this might be as simple as setting it up with the GUI Firewall tool that comes with F12 but I'm still not exactly sure how.
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Jan 19, 2010
ubuntu 9.10 login panel is worse with respect to ubuntu 8 since now all the users with names are shown without a way to hide them!Why don't keep the old way at least as an option?
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Oct 15, 2010
To avoid having to input a password for the keyring each time I connect to the net via wireless, I enabled the 'Available to all users' option in Network Manager. Now, my question is this. Are the 'users' it refers to just those created on this machine? Would a drive-by be able to use my network without entering the password?
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Jan 17, 2011
1. I understand you can protect your files or directories in your website by setting file/directory permissions. The meaning of r w x is clear to me, but I'm not sure how to proceed... Starting with the index.html file, if I wanted to make it so that anyone in the world can read it but can't modify it, do I set its permissions to rwxr-xr-x? If I set it to rwxr--r--, would that mean the file couldn't be served? I mean, what does the x setting do on a .html file, how can a .html file be executable?
2. If file permissions work on the lines of owner-group-others, in the context of a website, who is 'group'? As far as I can tell, there's only the owner, which is me, and others, which is the world accessing the site. Am I correct in thinking that by default, say when creating a website on a shared hosting server, there is no group unless I specifically set one up?
3. My ISP allows the DynDNS.org service, meaning that I could serve a website from my home. It's too early to go that route just yet, but for future reference, I would like to ask about the server software called Hiawatha. It is said to be secure, but having read some evaluations of it, it doesn't seem to offer anything that couldn't be accomplished with Apache or Cherokee, it's just that its security settings are simpler and easier to configure. Am I right about this? Or does Hiawatha truly offer something that the other major server packages don't?
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Mar 3, 2011
i updated both browsers i have and lost my secure log-in pages (no padlocks showing ) concerning different Web mail accounts.Just before i did these updates i checked an unrelated thing on-line regarding my sound card of which i kept a copy of and got this message below :
!!ALSA/HDA dmesg
!!------------------
[ 12.762633] cfg80211: Calling CRDA for country: AM
[code]....
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Mar 29, 2010
Conky can be used to display a variety of information on the users desktop. I wanted to use Conky instead to display the current status of security as reported by:
SANS Internet Storm Center
IBM Internet Security Systems
Symantec Threatcon
McAfee Threat Center
I therefore created 4 small scripts which download the current status from these sites, and set the colour of those status's depending on the current value.The conky configuration allows for a semi-transparent background - though this is optional.Attached is an example image showing the 4 different colours.Also attached is an archive with the 4.sh files, .conkyrc and draw_bg.lua (from here http:[url].....
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May 29, 2010
I just installed Ubuntu on a desktop. Can anyone give me some guidance on installing basic security software? In particular, I'm looking for a firewall, antivirus, and anti-spyware/malware utilities.
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Aug 3, 2010
I 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.
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Nov 11, 2010
As it stands I have a small home network operating behind my modem/router. Some of the ports on this are forwarded to my PS3 for gaming but I was looking at forward some for my file server.
At the moment I've forwarded port xxx22 to port 22 on my server for SSH for instance. ANd similarly 21 for FTP (although it doesnt seem to want to connect for any more than a few seconds using that). What I was thinking of doing was placing a small website for a handful of ppl to use on the server too and port forward again - xxx80 to 80. It works just fine but I'm a little concerned on the security front.
As I've moved the port to something different from the outside world I'm presuming I will have already cut the potential for malicious folks to wander in but is there anything else I should be doing? At the moment there's no firewall operating on the server, usually as its hidden behind the modem/router. But if I open this thign up more permanently what should I be doing? I've read a few articles on it but I'm always left with the overwhelming thought of "Thats if theres no firewall in my router" as they just seem to do the same.
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Feb 28, 2011
When posting results from ifconfig, it shows the hardware address of etho, etc. Would you consider that to be a security risk ?
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May 8, 2011
I'm concerned about security of having a LAMP server on my laptop as having any server makes the system less secure. However, if I were to create a new partition and install a lamp server on that and only use it when offline, would the security of my main partition be affected at all?
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Jun 7, 2011
The default Firewall ufw is not enabled by default at the time of installation and it has to be enabled by the user.Isn't this a security risk or is the user whether ufw is enabled or not secured from external threats?I am not much knowledgeable about network security But I am trying to understand the Ubuntu mentality behind this default setting.
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Jul 22, 2011
I've recently been running a game server from my desktop, as well as a web page to accompany it.I use the ports 80/8123(HTTP)/5900(VNC)/50500(GAME)/5839(ADMINISTRATION).What's the best solution to protect my server from security threats? On a side note, I plan on adding a MySQL server later, but I want to keep it local only.
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Mar 25, 2010
Having read on the forums about some of the dangers of running Wireshark as root, I would like to know if anyone can suggest some alternative packet sniffers/network analyzers which will offer similar results but without the security issues. I am using Karmic Koala on a Fujitsu Siemens laptop with wireless router (firewall enabled)
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Apr 2, 2010
So yesterday I receive a copy of the SANS @RISK security vulnerability newsletter, and, lo and behold, Mozilla's Firefox and Thunderbird are on it yet again. (Yeah, I know, shocking, isn't it?)So I quickly check what versions I have installed. Yup: Vulnerable.I check whether updates are available.These are pretty serious "remote code execution" vulnerabilities and the status is "vendor confirmed, updates available." So why isn't my 9.10 desktop's update manager telling me updates are available?
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Jun 15, 2010
I have read that to improve security in Ubuntu a good fix is to make the /home folder tree non-executable by default. This would mean that malware could not run in the /home tree without changing the setup.Is this a viable change, or is it just icing on the cake, any one any thoughts on this.
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Jul 6, 2010
I always use VNC to check my server for updates, and this morning I started the xvnc4viewer to vnc into my server and it keep asking for a password. I never setup a password because I do this local from my laptop, and I am the only one who uses my laptop. I had to go to my server and check the setting in System > Preferences > Remote Desktop and found them all changed. There was a password setup and there was a check mark in the you must confirm each access to this machine there some security update that changed all these setting? Sometimes when I do updates I don't know what is being changed on my server
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Aug 14, 2010
is there a way to run flash and java securely? stupid question i guess. i'd like to use a couple of sites that require them but don't want to open my box up to the bad things that can happen with these. videos, pandora etc. i don't know linux security well and just wonder what the ramifications of this will be?
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Aug 14, 2010
i have just recently purchased a SeaGate 1TB External Hardrive. i have very sensitive information on this storage unit that i only want certain people to have access to. is there any way of password protecting the hardrive? preferably using linux or what are my options?
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Aug 14, 2010
I'm new to server admin, so my question is based on what may be a bad assumption. With a server, my assumption is "if it ain't broke, don't fix it". In other words, I'm not really interested in upgrading the software to the latest and greatest if I already have stuff working on the server.
However, the one place where I DO want to constantly have upgrades is for security patches. How do I apply security updates to Ubuntu Server... and ONLY security updates?
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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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Aug 31, 2010
Or do you just use Ubuntu feeling safe enough without them? If you do use AppArmor and other security measures, what do you use them for? Obviously Firefox and Chrome would be two things. But what else?
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Sep 8, 2010
Whenever I login as root, an e-mail with the subject "Security information" is sent outwhere the e-mail address for this message is configured? I need to change it (or perhaps disable it).
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Oct 25, 2010
With an Ubuntu 10.10 upgraded from 10.04, under Software Sources, Updates, there is a radio button marked "Install security updates without confirmation." I have this radio button marked, but still get "Important security updates" almost daily in my update manager. I don't remember this feature actually ever working.
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Oct 30, 2010
how to configure my security. Upon install from the disc, the dialog asks for "automatic login" I selected that and although it automatically logs in upon cold start, I'm asked constantly by the terminal for my password when making any changes or downloads from there. In addition, I'm asked by my other interfaces and settings programs for the password as well. Since this is a new system, there is much getting apps and changing settings, so to type in my password 3 times every 5 minutes becomes annoying and time consuming.
So what I'd like is a pointer to a "how to" which tells me how to adequately deal with all these requests and typing in my password to a configuration which is comfortable for me. I'd like to be able to just sit down and turn on my computer and do whatever I want without having to deal with passwords at all "except online". I'm the only user this system.
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