Ubuntu Security :: Samba Fileserver Filled With Viruses?
Sep 23, 2010
I've prepared a Samba fileserver at work without much too problems and I've prepared a batch file to mount it as z: letter on windows machine at startup.As a sad result the share gets filled with many viruses and became a vehicle of infection.
folder1 ----> folder2 and many other files and folders
folder1 has a condivision access read and write for everyone so I get no problems with passwords for all those who have access but i use ntfs security to do it read only (viruses act like if a pendrive is connected and mainly put infected files just in the "root" of it, in my case in folder 1) and then give everyone full control in folder2. I've been trying to understand how to do this but I'm quite new to linux and smb.conf really scared me. I've tried samba graphical tool which was a lot easier but I'm not able to achieve this kind of result: no need of user password for users to mount the share and no write possibilities in folder 1 and full control in folder 2.
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Jun 27, 2010
I recently upgraded my ubuntu samba fileserver to 10.04 along with increasing the size of my RAID 1 /home directory.I am using the same smb.conf file setup I have used on intrepid ibis setup and hardy heron setup before that.On my new setup, I can see the ubuntu server on my windows 7 machines, but I can't see the shares and can't access them.In checking the logs (/var/log/samba), one log continues to look for a printer share from one Windows machine that I have not set up on samba yet.
I have found a few people who have reported similar problems online, even a few who have filed bugs, but then they say "my computer started working suddenly. I don't know what happened." so they closed the bug. or "my computer started working after I rebooted my machine." I have rebooted all machines on the network. That doesn't fix it.
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May 12, 2009
New fun from M$, we have started to test Win-7 on a few machines, and while it worked flawlessly in XP, Vista and Win-7 beta, logging on to the share (AD) from a Win-7 RC doesn't work.
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May 19, 2011
My all production PC r running under ADC windows2008 server. Recently I implement a file server in CentOS 5. Now I want to integrate Samba (File sharing) using Active Directory so that all access permission to file server comes from AD's permission.
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May 26, 2011
I'd like to set up a fileserver for myself and a few trusted individuals. I'm computer savvy and I use various linux servers frequently for work, but this is my first time trying to setup my own. Is it possible to have a Samba server setup so it is both secure and facing the Internet? Two questions:
Will opening Samba ports make my default Ubuntu server particularly vulnerable to penetration? More than having an SSH server running? Does Samba/ can Samba be configured to encrypt traffic or is it sent plainly? If so, does Windows and Mac support this secure communication?
If not, what would you suggest? I'd like to achieve something like a network drive and at a difficulty level that my parents could use this if they really wanted to. I will be storing things like financial information and tax returns, but no weapons-grade secrets.
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Aug 2, 2010
i was thinking that is there a way to check data flow for viruses? i mean if i set up calm av in my internet sharing server could it detect anything in incoming and outgoing data ?!!
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May 25, 2010
I am a very new Linux user. My first OS is Fedora 12, which I just recently installed into my laptop. So far, I am thoroughly enjoying it. I do have a question bugging my mind though. Linux systems are known to be very safe from viruses, mainly due to programmers targeting the Windows platform. In Windows, common methods for virus infections are from infected executable files, external drives autorun... ETC.
Now my question is how do viruses spread into a Linux system? And with so few viruses known to exist for Linux systems, do I really need to be aware and take precautions for viruses (For example in Windows, disabling autorun function for external drives)?
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Sep 20, 2010
I read some articles about viruses in Linux and about some antiviruses which work in Linux and delete Windows viruses but I still don't understand: is there any antivirus which specializes in Linux viruses? Even though there are very little of Linux viruses, I know.
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Jul 15, 2010
I have a dual boot computer. The WindowsXP "side" has been infected with a rootkit virus. So far UBUNTU has not been affected to my knowledge. I have not yet been able to remove the virus from the WindowsXP "side". I am thinking of deleting the NTFS partition and have the computer fully dedicated to UBUNTU.
Now for my question. Is there a possibility that the virus resides in the MBR and that I need to "rebuild" the MBR to actually remove the virus? Even more extreme, should I totally re-install UBUNTU in the name of safety and precaution.
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Mar 26, 2010
I would like to use my Ubuntu 9.10 Karmic system to scan and clean viruses from Windows based HDD. I have KlamAV, AVG, and AVAST. I couldn't get F-prot to work. I don't find a debian package of it and don't know how to install tar.gz and the tutorials don't help a lot. Are there other antivirus solutions which are good for cleaning Windows OS but work on Linux/WINE? I wonder if I can install antivirus software in WINE and scan with no problem the hard disks.
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Mar 30, 2011
I have been told that some virus scanners for linux (including but not limited to AVG, Antivira, clamAV, others) are available to ubuntu. My question is which of these still CURRENTLY support detection of WINDOWS viruses in addition to linux viruses. I would like to boot the Ubuntu live jump drive I have to scan windows machines and at least detect viruses, dont really need to repair. who knows which virus scanners compatible with ubuntu that will detect windows viruses as well
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Feb 6, 2011
I have set up a virtual machine under VMware Player 3.1.2 in Debian. Operating system of this virtual machine is a Windows Server 2003. I would like to periodically test this Windows Server 2003 installation for viruses. Obvious solution would be to install an AV software under this Windows Server 2003 installation. However, I was wondering, is this possible to use NOD32 for Linux or clamav in order to test this Windows Server 2003 installation for viruses? Is NOD32 for Linux able to detect viruses inside the .vmdk file?
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Feb 17, 2010
I know that ubuntu is highly resistant to windows based viruses but what if I open a attachment or click on a link within a email that is infected with a linux or platform agnostic virus?
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Jul 4, 2011
I thought ubuntu could not get viruses? Well I scanned with ClamTK and it found a virus.
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Mar 19, 2010
I've got a samba share on a linux server, connecting to it with a windows 2k3 server via tools > map network drive. The goal is to be able to use windows to change the security of the samba share. The good news is it works! The bad news is it's not QUITE perfect:
The share is called /company. I started with the following to give everyone access to everything, set the owner of the share to administrator (my domain admin on the Windows domain), and set the group owner to domain users (group that everyone on the domain is part of):
Code:
chmod -R 777 /company
chown -R administrator /company
chgrp -R domain users /company
I then mapped the drive as a regular user, and of course, can access/modify/delete/rename/create anything I want. Then I picked a folder to lock down. Let's call it /company/myFolder. I did this on the Windows server by mapping the drive as administrator (the owner), right click > properties > security tab > advanced > highlight "domain users" and "everyone" and click edit > clear all (i.e. remove all access). Go back to Linux and
[Code]..
The only issue that remains is that I am able to rename/delete "myFolder" as a regular user. I thought this was coming from the "acl map full control = true" parameter in smb.conf, but I changed it to false and verified the change and it still happens. If I remove group and world write access to /company, I am no longer allowed to rename/delete myFolder, but then I can't create a new folder. If I add group write access back in I can create files but can also rename/delete folders within /company that have --- specified for group access. Any ideas what I need to tweak to make this right?
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Jan 4, 2010
I use one PC only, I paste some files and folders into the U1 folder. Files upload to the webstore, I can see them via the web. Now, *what* is subsequently used as a *reference* for content? For example, what should happen if I rename a folder in the PC U1 folder? Should the new name later appear appropriately on the webstore? What should happen if I use the web access, and delete a folder in the webstore? The PC U1 folder remains full, does the web store get filled and corrected? At a time when the webstore is complete and correct, if the contents of the PC U1 folder is deleted by me, will the webstore contents act as a form of backup? Or will the webstore contents also get removed by U1 process?
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Jun 18, 2010
Lately however my root filesystem is getting filled up every night-- I come in in the morning and have notices that I have 0 bytes remaining. There's tons of room on the disk, but the root is full. Here's what it looks like with a df -h:
[Code]....
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Aug 14, 2010
I suspect that I have viruses in my ubuntu environment.What to do now?
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Jan 26, 2010
I have a computer on my LAN that I'm using as a file server for my photography work. What I'm wanting to do is allow my business partner be able to access the file server from his home over the internet. I'd also like to create a share folder on each of our computers so that we can each access and modify so we can sync our work easily without being in the same office.What would be the easiest way to do this and how exactly do you access another person's computer over the internet?
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Sep 24, 2010
I have ubuntu lucid lynx server running on an old eMachine as a fileserver. It has a big (2TB) slow (10-20 MB/s) external drive (ntfs-3g), and a small (20G) fast (60 MB/s) internal drive (ext3).
Using smbfs and vsftpd and sshd, all my data lives on the big drive and I'll see dramatic speed differences between the drives.
I'm wondering, is there a way to things up so that the external drive uses a cache on the internal drive to speed things up?
For example ... ftpd takes data from a client, and instead of slowly writing it directly to the external drive, it is written first (and quickly) to the internal drive, then, later, it is written to the external drive?
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Mar 16, 2011
i am taking another stab at this. The last time i attempted it, it seemed like everyone had a different way to do it, but nobody could give me an answer on how to do it...
I currently have a Domain Controller Running sme server and a domain controller, using ldap as a backend. I have two file servers runing ubuntu 10.04. My overall goal is to have it so when i create a username on the domain controller, it is then automatically copied over to the fileservers. This way everyone will have their own username and password to access the fileservers and ill be able to track what people do on the fileservers.
The next necessity is for me to be able to apply permissions to the folders on the fileserver based on the users that are created on the domain controller.
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Nov 30, 2010
I`m looking for solution for fileserver which could be accessed by VPN from Windows. Is it possible to configure something like this ? If yes, what kind of software should I use ? VSFTPD, Samba?
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Feb 16, 2010
i have a HP wx8000 with a scsi drive on it that has a max capacity of 65GB. my HDD reports that it has 57.5 Free. it also reports that i have 56.2GB used. i am really confused at this point. it was a brand new install 5 days ago.
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Mar 16, 2010
I realized that I had 0 k free on my drive and when I search to find out what was the problem this is what I have found.
In /var/log/ I had two 55GB files, one called "user.log" and the other "syslog", since it had 55GB I had to tail it and came out with this:
lucian@lucian-laptop:~/luciserver$ tail log_2ndfile_55G_tail
Mar 16 15:40:39 lucian-laptop scanadf: io/hpmud/pml.c 375: SetPml channel_write failed ret=31
Mar 16 15:40:39 lucian-laptop scanadf: sane_hpaio_cancel: already cancelled!
Mar 16 15:40:39 lucian-laptop scanadf: io/hpmud/hpmud.c 632: invalid channel_write state
[Code].....
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Sep 4, 2010
i have an 8gb sandisk micro sd card that i was having problems with, so i decided to zero it out, problem is now i can't repartition it.i have tried gparted, the disk won't appear, but when it is attached, i can see a /dev/sdb in devices that isn't there otherwise.is it possible to create a new partition table on this, and how?also i am trying to 'sudo mkfs.vfat /dev/sdb' but it is saying
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Oct 2, 2010
I read few threads from 2006, and at that time it seemed there was no good way to save a PDF which had data input in the form fields. Has this changed? Printing is not really an option, since I won't fill these forms in one sitting. When I save with Ubuntu's default PDF viewer, the form field data does not seem to be saved along with the PDF.
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Mar 28, 2010
I have ClamTk on Ubuntu 9.10 and I wonder if it REALLY works effectively against viruses.
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Mar 5, 2011
i know linux is very unlikely to get viruses and malware, but what about trojans?
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May 19, 2010
I am very new to Ubuntu (any Linux) evironment. And it has been a long long time since I have dealt with seting up servers. I have done alot of searching but haven't found exactly what I THINK I am looking for.
I want to create a file server (I have created my Ubuntu server cd) and add it to my home network (all windows pcs). I need to be able to access it when away from home ( I work away from home mostly). I will be accessing this with a Windows 7 laptop.
What do I need installed on the server? Samba for the file server part. What else for the remote access? I also would rather not access the data via FTP. I would like it to come up as a drive in my Windows Explorer. If not, I remember back in college (20 years ago) when I could open a little window (XWindow maybe) on the other server.
An issue I see that might not be an issue. I have a static IP from my ISP. It comes into my home via their modem. I attach to the modem with a router. All my laptops connect to it wireless and this server will be wired. How do I hit the server and not one of the laptops with only having the one IP address? Each of these plus my external harddrive and printer have their own internal IP address' that I have assigned.
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Mar 15, 2010
I am somewhat of a newbie at *nix. I've asked some questions about Debian in the past, but I decided to just go ahead and start simple, with Ubuntu, then moving up once I've got the hang of things. So, I want to use Ubuntu 9.10 as a fileserver for my network, which consists of 3 Windows PCs and 1 Mac. I have a few ideas on where to go, Samba being my first package install, but I'm not too sure where to go from there. Could someone help me out? I love to RTFM, so if you'd point me kindly in those directions, I'll be glad to jump right on that too.
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