General :: Is It Safe To Mount Encfs Via Nfs On Several Machines Simultaneously
Mar 25, 2010
There are some encfs folders with private data on the server and all data is exported via nfs to all other omputers in the house.I can mount the encfs folders on another computer (using encfs command) to work with the data, but I never dared to mount it on more than one computer simultaniously, because I fear the encrypted data might get corrupted if more than one computer mount and access it at the same time.
So I want to ask about your experience: Is it safe to mount an encfs folder on several computers at the same time? All computers use "hard" and "sync" as nfs mount options to minimize risks of data loss. But can I access the folders simultaniously, or do I risk corrupting the encfs encryption and lose everything?
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Apr 21, 2011
I have an NFS share hosted at a file server for several machines. I set up an encfs encrypted file tree in this. First, I created a directory in the NFS mounted tree where I wanted the encrypted files to be store (/home/nfs/phil/private). Second, I created a mount point where I wanted to access those files in the clear view (/home/phil/nfs-phil-private). Third I mounted encfs with the simple command "encfs /home/nfs/phil/private /phil/nfs-phil-private". During this mounting, it asked me for a pass phrase to encrypt the files with. Fourth, I copied some files into "/phil/nfs-phil-private". I saw that files with cryptic names were created in "/home/nfs/phil/private", along with a file named ".encfs6.xml".
That was on one machine named "lorentz". Then I switched to another machine named "euler". I created the same mount point here (/home/phil/nfs-phil-private). I verified that /home/nfs/phil/private already existed, as did "/home/nfs/phil/private.encfs6.xml". So I tried the same "encfs /home/nfs/phil/private /phil/nfs-phil-private" command. This time it failed. Here is all the output up to the first prompt:
Code:
15:05:23 (FileUtils.cpp:375) Archive exception: stream error
15:05:23 (FileUtils.cpp:326) Found config file /home/nfs/phil/private/.encfs6.xml, but failed to load
Creating new encrypted volume.
[code]....
The first two lines certainly appear to be some kind of error. I can cat the .encfs6.xml files just fine, so I do have permission to read it. It had not even prompted me for a password, yet. Anyone know what the deadl with this is? A possible cause is that the first encfs is version 1.6.1 (ubuntu 10.10 packaged as 1.6.1-1) and the second encfs is version 1.5.2 (ubuntu 9.10 packaged as 1.5.2-1).
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Feb 17, 2011
I have two computers on my network, both are running Ubuntu 10.10. I wish to access encfs-encrypted directories on a remote computer from my local computer. I used nfs to mount the remote encrypted directory onto my local machine, and then I used encfs to decrypt. But because of nfs' use of some UID-type ownership convention rather than user:group, I have no access to the directory I just mounted.I want my local machine's software to access the files, so ssh login is probably not a solution, and I would like to avoid using encfs' --public option if possible.
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Jun 15, 2011
Whenever I mount a encfs directory to a regular directory, the regular directory disappears. this is the command I use
encfs ~/encrypted ~/plain
When I try to access the folder from my windows computer, I can not see it. What to do?
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Mar 4, 2010
Can mount.ntfs and mount.ntfs-3g reside simultaneously?
Whilst accessing an external NTFS drive mount.ntfs takes up a lot of CPU. I am not sure if its mounting the drive using mount.ntfs or mount.ntfs-3g? How do I find out and if they coexist how do I make the default mount drive ntfs-3g?
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Apr 10, 2010
What could block access from Fedora to just one Windows XP system without blocking access to or from other Windows systems on the network? I have a working Windows network with six computers and one network-attached-storage. Two of the computers (MARTIN and NANCY) are Windows XP, the rest are older. I set up a Fedora laptop with Samba. The Fedora system can access the Internet (I'm using it to post this message). It can see all the Windows systems, and it can open all of them except MARTIN. The firewall on MARTIN is turned off.
I go to Places, Network, and I see nine icons: the Fedora system, seven Windows systems and one for Windows Network. If I double-click on the MARTIN icon I get a message window that says "Unable to mount location" and "Failed to retrieve share list from server". If I double-click on any of the other Windows icons, including NANCY, a new window opens showing the shares on that system. Similar results with smbclient. It shows the shares for all systems except MARTIN. For MARTIN it says "Connection to MARTIN failed (Error NT_STATUS_UNSUCCESSFUL)."
The other Windows computers on the network can open the shares on MARTIN with no problem. The network is partly wired and partly wireless. The wireless network is secured with WEP. The Fedora laptop is (as you might expect) wireless. The Fedora laptop is an emachines E520 and both Windows XP machines are custom-built tower systems. I don't think that information is relevant but I mention it anyway. What should I look for?
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Nov 29, 2008
I have a script which runs a few other scripts (in subfolders of the first script) in order to mount some unix/linux shares) Anyway, when I run the file from rc.local and try to pipe the output into a file the file is empty and the shares are not mounted. however when I run the file it mounts everything.... Also, the script doesn't work on my wireless clients...
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Mar 14, 2011
I have two networks on a server. One being my internal network, and the other being an external IP address. This is on Debian Lenny. Here is my /etc/network/interfaces file:
I can reboot my system and sometimes eth1 is accessible from SSH, and other times eth0 is accessible. Then sometimes eth1 will just stop being pingable alltogether. This is a fairly fresh install of Debian, and the only thing I have running is VMWare Server 2.0, bridged to both of my network connections.
Here is what my route looks like:
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Feb 6, 2010
I want to copy data from one source drive to three or more destination drive simultaneously. I tried with dd command. But it copy entire Hard disk. Its take long time to copy entire disk. i need the utility or software to copy one source to multi destination simultaneously and fast manner
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Feb 9, 2010
It's easy to have multiple user accounts on one computer and even switch between accounts without logging off. It is also possible to have more than one display connected to a single computer. Is it possible to have one multi-core computer be used simultaneously by two users in their own accounts? Is there specific hardware required (to allow keyboard and mouse distinction for each user) and software configuration?
I know you can setup remote connections on windows that allow you to open and use a second user account without bothering the first user, but how about working locally on the same machine, essentially removing the network delay of remote desktops? What OS supports this? Linux Ubuntu? Windows 7?
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Feb 8, 2011
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Apr 8, 2010
I had configured OpenVpn on my Server.Is it possible to Configure and run IPSEC simultaneously on the Same server?
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Nov 18, 2010
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Jul 1, 2011
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Jun 30, 2011
my os is opensuse 11.4. I tried k-encfs, but failed. Running the .rpm file said successfully installed, but I cant find the program and running the 'install' script gives me another error message.
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Apr 13, 2011
I am trying to get Encfs working on Ubuntu 10.10 with only partial success. I am using the Ubuntu package which is version 1.6.1. I am also trying to build 1.7.4 source on Ubuntu 10.10 which is failing.
First the problem with the Ubuntu package, which I realize may be fixed in 1.7.4. I am mounting a clear directory with the --reverse option to have an encrypted view of this data. This so far works, although I do not know if it really works correctly. I used rsync to copy all the encrypted data to a third directory outside of this first mounting. Then I do a second mounting (without --reverse) using that copy as the source, to make a mountpoint with a clear view of the copied encrypted files. This fails as no files show up at all.
I am doing it this way because my intended first use for Encfs is to copy an encrypted view of a local physically secured backup directory containing clear data to another remote machine where sometimes it is not physically secure. Transfer is by ssh over rsync, but that is not sufficient security for the remote machine. So the role of Encfs is to be sure the data is never in a clear state on that machine when the machine is not attended. This location is the home of the owner of the company who is not always at home. The machine is, in theory, at risk for theft when no one is at home (this is the risk we want to address). The owner will personally have the Encfs password, and may need access to some of these files. So it would be treated as an encrypted store and Encfs would be used to view it in the clear by manually mounting it that way (e.g. not with --reverse).
I am doing the test entirely on my desktop at the moment, as described above. I am using a script to carry out the entire setup of my tests, so it is fully reproducible, and that configuration can be incrementally changed as desired. I have a suspicion that certain messages resulting from the setup may indicate the problem. This is from the first mount with --reverse:
Code:
Creating new encrypted volume.
Standard configuration selected.
--reverse specified, not using unique/chained IV
Configuration finished. The filesystem to be created has
the following properties:
[Code]...
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Jul 8, 2011
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Apr 15, 2011
I have a home server running Openfiler 2.3 x64 with 4x1.5TB software RAID 5 array (more details on the hardware and OS later). All was working well for two years until several weeks ago, the array failed with two faulty disks at the same time. Well, those thing could happen, especially if one is using desktop-grade disks instead of enterprise-grade ones (way too expensive for a home server). Since is was most likely a false positive, I've reassembled the array:
Code:
# mdadm --assemble --force /dev/md0 /dev/sdb1 /dev/sdc1 /dev/sdd1 /dev/sde1
mdadm: forcing event count in /dev/sdb1(0) from 110 upto 122
mdadm: forcing event count in /dev/sdc1(1) from 110 upto 122
[code]....
Right. Once is just a coincident but twice in such a sort period of time means that something is wrong. I've reassembled the array and again, all the files were intact. But now was the time to think seriously about backing up my array, so I've ordered a 2TB external disk and in the meantime kept the server off. When I got the external drive, I hooked it up to my Windows desktop, turned on the server and started copying the files. After about 10 minutes two drives failed again. I've reassembled, rebooted and started copying again, but after a few MBs, the copy process reported a problem - the files were unavailable. A few retried and the process resumed, but a few MBs later it had to stop again, for the same reason. Several more stops like those and two disks failed again. Looking at the /var/log/messages file, I found a lot of error like these:
Quote:
Apr 12 22:44:02 NAS kernel: [77047.467686] ata1.00: configured for UDMA/33
Apr 12 22:44:02 NAS kernel: [77047.523714] ata1.01: configured for UDMA/133
Apr 12 22:44:02 NAS kernel: [77047.523727] ata1: EH complete
[code]....
The motherboard is Gigabyte GA-G31M-ES2L based on Intel's G31 chipset, the 4 disks are Seagate 7200.11 (with a version of a firmware that doesn't cause frequent data corruption).
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Sep 14, 2010
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Dec 18, 2010
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Feb 24, 2010
I could not find details of what CryptKeeper was doing and I worked this out. It shows how to open and close CryptKeeper files using encfs form the command line. I hope this helps others.
Ubuntu karmic 9.10. CryptKeeper 0.9.4-1 encfs 0.5.2-1ubuntu1 also works in Mint8. Tom Morton author of CryptKeeper site: [url]
How Gnome Cryptkeeper works with encfs
In CryptKeeper create a new encrypted folder:
The directory above is created and also another hidden one called: /home/ian/.aaaaaaxxxxTestCryptKeeper_encfs which contains one hidden file called .encfs6.xml. As you create additional folder and files in the /home/ian/aaaaaaxxxxTestCryptKeeper additional folders and files with encrypted names are created in /home/ian/aaaaaaxxxxTestCryptKeeper 4L9KBI4IeoAKOoZ,IwzVyn2VPGysXt-JCbStUej5Ewnn90. These mirror any files and folders which you create in the encrypted directory except that there names and contents are totally encrypted.
The above CryptKeeper directory can be created anywhere within the Linux file system, for example, on another partition. In each case two directories are created within the parent (in this example /home/ian/), one with the original directory name, the other preceeded with a "." and followed by "_encfs".
How to open a directory created with CryptKeeper using encfs.
Provided you copy the directory like .aaaaaaxxxxTestCryptKeeper_encfs and all its contents, it can be opened anywhere using the following command. (Note that full path names are needed.)
encfs /home/ian/.aaaaaaxxxxTestCryptKeeper_encfs /home/ian/aaaaaaxxxxTestCryptKeeper
The mount command will then show:
If /home/ian/.aaaaaaxxxxTestCryptKeeper_encfs does not exist you will asked if you wish to create it and you will be asked for a password twice. In this case it will not be in CryptKeeper unless you then import it.)
If it is a CryptKeeper file then it appears in CryptKeeper file list as opened and can be closed from there. To close from the command line type:
Note unmount will not work for these files.
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Apr 29, 2010
Right, just a quick question about rsnapshot over sshfs and encfs. I've set up an encfs filesystem, and when mounted on the remote machine remotely:
Code:
touch foo.bar
Code:
cp -al foo.bar foo.car
Works as one would expect it to.
The same is true on the local machine (The EncFS has External IV chaining disabled). However, when the remote dir is sshfs mounted on my computer here, and then encfs'd to a decrypt mount on my computer, I can move files to it, and they go over the network and get encrypted, however:
Code:
cp -al <file> <file>
No longer works, I get 'not implemented' errors...
I thought since I don't have External IV chaining this shouldn't be an issue - I've tried without any of the file chaining options, again to no effect. All work remotely, or with both locally, but not over sshfs. Is this a quirk of sshfs?
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Jun 19, 2011
Set up a few machines yesterday to test out some parallel code. Just for fun, I selected the "encrypt users files" option when setting up Ubuntu (10.10). I had never used the option in years past. Now I'm finding it a pain. EG., ssh requires me to already have a login to the machine before it will let me log in w/o a password (eg., using id_rsa.pub and authorized_keys).
Similarly, I have no reason to encrypt files on these machines. They're just crunching numbers. Is there an easy way to disable this? Or do I need to delete my original user and make another one (with all the su privelages, etc...) w/o an encrypted file system / home directory.
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May 9, 2010
Just a warning / question about Encfs on Slackware current. I doesn't work due to the upgrade to boost 1.4.2. I ran encfs on an old install of 13.0 to get at my data, but I'd prefer to access it right from current. A big warning: if you try to access your encrypted data on current it will corrupt your encfs6.xml file and I don't know if it is recoverable (I had a backup of mine).
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Aug 22, 2011
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Jul 7, 2011
I'm running 11.04 (64 bit) get the following in my syslog
[Code]....
1) Why is this happening
2) How can it be fixed
3) How can it be avoided
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Sep 27, 2010
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Code:
hamstrsearch_local-hmmer3.pl -protein -refspec=lotgi_2713 -hmmset=lophotrochozoa_hmmer3 -sequence_file=Aplysia_californica.fas -taxon=ACAL
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Mar 8, 2010
I started up my machine this morning and entered my password to encfs as I do each day and was greeted with a message telling me my password was incorrect. I tried several times, checked caps lock but no joy.
The message (which I didn't copy and paste unfortunately) mentioned ssl and I remembered that openssl was one of the security patches I applied at the weekend. So I removepkg'd the two openssl packages (v0.9.8m) and then installpkg'd the original ones that came with slackware 13.0 (v0.9.8k).
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Jun 7, 2011
I've been trying to share a folder with samba. This folder is the decrypted version of an encfs encrypted folder. Mounting the decrypted folder on the server is done automatically on login using gnome-encfs. Exposing the folder locally works like a charm. Now where I get stuck is trying to access the samba share from a client (even with smbclient on the server itself). I can see the share with smbclient -L:
tijm64@tijm64-HTPC:~$ smbclient -L 192.168.1.100
Enter tijm64's password:
Domain=[TIJM64] OS=[Unix] Server=[Samba 3.4.7]
[Code].....
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Mar 2, 2010
[URL]
encfs: preserve timestamps on a shared encrypted folder?
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