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  • losetup does not decrypt device in Ubuntu 11.4 as before

    - by Kay
    I had an external volume mounted using losetup for about two years. It was created using Ubuntu 9.4 and I used the same Ubuntu installation throughout all dist upgrades. Now as I bought a new laptop I set up a fresh Ubuntu 11.4 installation on it. Problem is: losetup -e twofish /dev/loop0 /dev/sdb2 does not decrypt the volume anymore. The data in /dev/loop0 contains apparently random data. I am sure I entered the correct password. I modprobe'd cryptoloop and twofish. My question is: Has Canonical done some obscure changes to losetup like adding a salt? Does losetup depend on configuration files I did not know about? How can I decrypt the volume on my now laptop?

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  • Create XFS volume on /dev/sg* device

    - by cpt.Buggy
    Now I have couple of Supermicro 24x2Tb SATA servers and I have now idea how to get access to disks. I need to create XFS volume on each of them but really don't know how to do it, because fdisk doesn't see them. # sg_scan -i /dev/sg0: scsi0 channel=0 id=0 lun=0 [em] ATA ST3250318AS CC38 [rmb=0 cmdq=0 pqual=0 pdev=0x0] /dev/sg1: scsi1 channel=0 id=0 lun=0 [em] ATA ST3250318AS CC38 [rmb=0 cmdq=0 pqual=0 pdev=0x0] /dev/sg2: scsi6 channel=1 id=8 lun=0 [em] Hitachi HDS722020ALA330 JKAO [rmb=0 cmdq=1 pqual=1 pdev=0x0] ... ... ... /dev/sg25: scsi6 channel=1 id=31 lun=0 [em] Hitachi HDS722020ALA330 JKAO [rmb=0 cmdq=1 pqual=1 pdev=0x0] /dev/sg26: scsi6 channel=3 id=0 lun=0 [em] LSILOGIC SASX36 A.1 7017 [rmb=0 cmdq=1 pqual=0 pdev=0xd] # sg_map /dev/sg0 /dev/sda /dev/sg1 /dev/sdb /dev/sg2 .. ... ... /dev/sg25 /dev/sg26 I can't use fdisk and mkfs, what should I do?

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  • EMC VNX iSCSI setup - unsure about SP/port assignment

    - by pauska
    We have a new VNX5300 waiting to get configured, and I need to plan out the network infrastructure before the EMC tech arrives. It has 4x1gbit iSCSI per SP (8 ports in total), and I'd like to get the most out of the performance until we jump over to 10gig iSCSI. From what I can read from the docs - the recommendation is to use only two ports per SP, with 1 active and 1 passive. Why is this? It seems kind of pointless to have quad-port i/o-modules and then recommend to not use more than two of them? Also - I'm a bit unsure about the zoning. The best practices guide state that you should separate each port on each SP from each other on different logical networks. Does this mean that I have to create 4 logical networks to be able to use all 8 ports? It also gives the following example: Does this mean that A0 and B0 should sit on the same physical switch aswell? Won't this make all traffic go on one switch (if both A1 and B1 are passive)? Edit: Another brainpuzzle I don't get it - each host (as in server) should not have more iSCSI bandwidth available than the storage processor. What on earth does this matter? If serverA have 1gbit and serverB have 100mbit, then the resulting bandwith between them is 100mbit. How can this result in some kind of oversubscription? Edit4: Wait, what. Active and passive ports? The VNX runs in a ALUA configuration with asymmetrical active/active.. there shouldn't be any passive ports, only preferred ones..

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  • blocking hotlinking with .htaccess only works for plain domain, when preceeded by www no block

    - by casualprogrammer
    Having tried all sorts of suggestions popping up from google, I am at my wit's end. Presently I use a solution created with htaccesstools.com/hotlink-protection/ RewriteEngine on RewriteCond %{HTTP_REFERER} !^$ RewriteCond %{HTTP_REFERER} !^http://(www\.)?mydomain.tld/.*$ [NC] RewriteRule \.(gif|jpg|jpeg|png|js|css)$ - [NC,F,L] Checking it out with altlab.com/htaccess_tutorial.html testing facility (near bottom of page ) shows no image if mydomain.tld/mypic.jpg is entered, while if prefixed with www (www.mydomain.tld/mypic.jpg) the pic is displayed. Any helpful comments welcome.

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  • How to get an inactive RAID device working again?

    - by Jonik
    After booting, my RAID1 device (/dev/md_d0 *) sometimes goes in some funny state and I cannot mount it. * Originally I created /dev/md0 but it has somehow changed itself into /dev/md_d0. # mount /opt mount: wrong fs type, bad option, bad superblock on /dev/md_d0, missing codepage or helper program, or other error (could this be the IDE device where you in fact use ide-scsi so that sr0 or sda or so is needed?) In some cases useful info is found in syslog - try dmesg | tail or so The RAID device appears to be inactive somehow: # cat /proc/mdstat Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] md_d0 : inactive sda4[0](S) 241095104 blocks # mdadm --detail /dev/md_d0 mdadm: md device /dev/md_d0 does not appear to be active. Question is, how to make the device active again (using mdmadm, I presume)? (Other times it's alright (active) after boot, and I can mount it manually without problems. But it still won't mount automatically even though I have it in /etc/fstab: /dev/md_d0 /opt ext4 defaults 0 0 So a bonus question: what should I do to make the RAID device automatically mount at /opt at boot time?) This is an Ubuntu 9.10 workstation. Background info about my RAID setup in this question. Edit: My /etc/mdadm/mdadm.conf looks like this. I've never touched this file, at least by hand. # by default, scan all partitions (/proc/partitions) for MD superblocks. # alternatively, specify devices to scan, using wildcards if desired. DEVICE partitions # auto-create devices with Debian standard permissions CREATE owner=root group=disk mode=0660 auto=yes # automatically tag new arrays as belonging to the local system HOMEHOST <system> # instruct the monitoring daemon where to send mail alerts MAILADDR <my mail address> # definitions of existing MD arrays # This file was auto-generated on Wed, 27 Jan 2010 17:14:36 +0200 In /proc/partitions the last entry is md_d0 at least now, after reboot, when the device happens to be active again. (I'm not sure if it would be the same when it's inactive.) Resolution: as Jimmy Hedman suggested, I took the output of mdadm --examine --scan: ARRAY /dev/md0 level=raid1 num-devices=2 UUID=de8fbd92[...] and added it in /etc/mdadm/mdadm.conf, which seems to have fixed the main problem. After changing /etc/fstab to use /dev/md0 again (instead of /dev/md_d0), the RAID device also gets automatically mounted!

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  • Is there a simple way to detect ISP port blocking?

    - by Will M
    Is there a way to tell the difference between my ISP blocking traffic on certain ports and my NAT router/firewall blocking that traffic? The sites “Shields Up” and “Can you see me” show my ports closed or not accessible, but I assume that is primarily due to the NAT router. (Obviously, I could just remove the router, connect directly and use those sites, but is there a simple way to test without doing that?)

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  • How I disable "Safely remove hardware" in Windows 8?

    - by DarkGhostHunter
    I have a Marvell 91XX and I just updated to Windows 8. The problem I have with the latest drivers 1.0.2.1027 is the absence of "Policies" tab inside the Properties in the Device Manager, where I could disable de "Safely Remove Hardware". It was in Windows 7, but in the new version is not, so the OS shows my two hard disks has removable hardware and I can't do anything about it. Is gone forever? Is in another part? Or is not supported? PD: The best I can come up for a fix is to roll back to Windows 7, see if the option changes some regedit value, export, update to Windows 8 and import.

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  • Downloaded chm is blocked, is there a solution?

    - by David Rutten
    CHM files that are downloaded are often tagged as potentially malicious by Windows, which effectively blocks all the html pages inside of it. There's an easy fix (just unblock the file after you download it), but I was wondering if there's a better way to provide unblocked chm files. What if I were to download the chm file (as a byte stream) from our server inside the application, then write all the data to a file on the disk. Would it still be blocked? Is there another/better way still? Edit: Yes, downloading the file using a System.Net.WebClient does solve the problem. But, is there still a better way?

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  • Internet addicted, need software to control my usage and block access

    - by user69991
    I found I have problem to be a little addictive with surfing on internet. I am trying to find a free ware, (or software), that can help me for exemple to be just 2 hours per day on internet. Like it is counting the minutes and than stop working. not just 2 hours in one time, but in whole day.... maybe that it has different modes (2hours together, in whole day, 2hours + little reserve time) but I need something that really take me away access from internet :) Just counting time, is not enough for me :) Hope we will find something because, I just can't avoid not to loose 4 hours on internet. I have windows 7

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  • Why does Apache ignore my Directory block?

    - by Codemonkey
    I just moved my projects into a new workstation. I'm having trouble getting my Apache installation to acknowledge my .htaccess files. This is my /etc/apache2/conf.d/dev config file: <Directory /home/codemonkey/dev/myproject/> Options -Indexes AllowOverride All Order Allow,Deny Deny from all </Directory> I know the config file is being included by Apache because it complains if I put erroneous syntax in it (Action 'configtest' fails). My project is reachable through Apache by a symlink in the /var/www directory. The server is running with my user and group, so it has my permissions. My entire dev folder has permissions set to 770 recursively. Despite all this, I'm still getting an indexed display of my project folder when I visit http://localhost/myproject. Why isn't the above config making it impossible to view the folder in the browser?

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  • Windows PE 3.0 detect what device it was booted from

    - by Brian
    I am creating a custom boot disk for work using Windows PE 3.0. I need to be able to tell what drive the system was booted from. it may be a CD, or a USB Flash drive. In the past, I have looked for a file on the root of the drive that holds some of our custom configuration. however that is getting a bit messy. Basically, in addition to Windows PE, the drive or disk also has other scripts and tools. I need to remount that USB drive or DVD to the U:\ Drive, to keep thing consistent. Basically, Diskpart.exe Select Volume $X assign Letter=U Exit I just need to figure out how to determine that nasty little $X.

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  • Windows Mobile deletes my Contacts when deleting a partnership

    - by bitbonk
    Sometimes when I reinstall my PC get a new Work PC or buy a new home PC ,ActiveSync, now the Device Center asks me to delete an existing partnership to setup a partnership with the new PC, since only two partnerships are allowed. When I delete that partnership all contacts that originally came from that partnership get deleted too. How can I prevent that from happening. Do I really always have to remember to frequently backup all my contacts in a safe place? How much redundancy is needed. I hat them on one of my PCs and on my phone.

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  • Postfix - Block email from non-existent local addresses

    - by Kelso.b
    My question is very similar to this one, but for postfix. We keep getting emails from addresses like "[email protected]" delivered to other "@ourdomain.com" addresses. From my google research, I understand it might not be practical to verify the email originated from our IP or VPN (Although this would be ideal, so if you can think of a way to do this, let me know), but in most of these cases the sender address (ex. "accounting") is not a valid account. I imagine there must be a way to make sure that a local account exists before delivering the message.

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  • How do I mount an external USB hard drive on my Sheevaplug?

    - by James
    I've acquired a Sheevaplug running - I think - Ubuntu. I'd like to mount an external USB hard drive, but I don't know the name of the device that needs mounting. When I list the devices under /dev, a long list is produced. How do I find out which device listed needs to be mounted? Update: When I run dmesg after plugging the device in, I see the following at the end: usb 1-1: new high speed USB device using ehci_marvell and address 6 usb 1-1: device not accepting address 6, error -71 usb 1-1: new high speed USB device using ehci_marvell and address 7 usb 1-1: device not accepting address 7, error -71 usb 1-1: new high speed USB device using ehci_marvell and address 8 usb 1-1: device not accepting address 8, error -71 usb 1-1: new high speed USB device using ehci_marvell and address 9 usb 1-1: device not accepting address 9, error -71 And when I view /var/log/messages, I can see this: Sep 23 21:26:03 debian kernel: usb 1-1: new high speed USB device using ehci_ma$ Sep 23 21:26:04 debian kernel: usb 1-1: new high speed USB device using ehci_ma$ Sep 23 21:26:05 debian kernel: usb 1-1: new high speed USB device using ehci_ma$ Sep 23 21:26:05 debian kernel: usb 1-1: new high speed USB device using ehci_ma$ Unfortunately, I don't know what these mean.

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  • Is it worth the effort to block failed login attempts

    - by dunxd
    Is it worthwhile running fail2ban, sshdfilter or similar tools, which blacklist IP addresses which attempt and fail to login? I've seen it argued that this is security theatre on a "properly secured" server. However, I feel that it probably makes script kiddies move on to the next server in their list. Let's say that my server is "properly secured" and I am not worried that a brute force attack will actually succeed - are these tools simply keeping my logfiles clean, or am I getting any worthwhile benefit in blocking brute force attack attempts?

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  • Konsole Read/Write Access to PTY Device

    - by Carmen
    When I run something like: $ konsole -e "sleep 30" I get this message Konsole is unable to open a PTY (pseudo teletype). It is likely that this is due to an incorrect configuration of the PTY devices. Konsole needs to have read/write access to the PTY devices. But if I try to run this: $ gnome-terminal -e "sleep 30" Then it is fine, and it does not throw any error. How can I change the read/write access of the Konsole to the PTY devices?

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  • [Disallow: /index.php] seems to block /my-beautiful-sef-url-123

    - by Jaroslav Záruba
    Hello I have robots.txt that looks like this: User-agent: * Disallow: /system/ Disallow: /admin/ Disallow: /index.php The obvious goal has been to prevent all the ugly URLs from being indexed, as they all begin with "/index.php". But for some reason all URLs like /my-beautiful-sef-url-123 are listed under Crawl errors in Google Webmaster Tools with "URL restricted by robots.txt". (When I test such URL it yields Allowed for both Googlebot and Googlebot-Mobile.) Can anyone help please?

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  • Windows 7 can ping but can't see device on other subnet

    - by user192702
    I have 2 Windows 7 on 2 different subnets but 1 of them is unable to reach a NAS. The topology is as follow. Any idea why this is the case? Is there some Windows settings I need to apply? Subnet 1 - PC 1 - NAS Subnet 2 - PC 2 PC 1 is able to do the following: - Load the admin page on the browser. - Show the NAS under Windows Explorer - Network. - Access the NAS when typed in \\ in Windows Explorer. PC 2 is unable to do any of the above 3. It can however ping the NAS and get a response.

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  • How to monitor bandwidth use of each device on wifi network

    - by GWLlosa
    I have in my home a standard Comcast cable internet connection. I have it going from the wall to a cable modem, and from the modem to a late-series Linksys router, which provides wired and wireless networking. The vast majority of the users are wireless connections. For day-to-day tasks, this connection is fully sufficient for all my needs. However, on regular occassions, we have social gatherings that involve many people bringing laptops and other PCs and using the network and internet simultaneously, frequently for gaming. I have no administrative oversight over these machines; they have been known to be riddled with spyware and/or bloatware or be running torrents, legal or otherwise. The only reason I care is that on a regular basis, one of the machines will flatline my internet bandwith, and consume it all in order to upload/download/spam people/whatever. When this happens, the latency of the connections for gaming and the like becomes unacceptable, and everyone suffers. My question is: Is there a system I can set up whereby I can easily monitor the various systems connected to my wireless connection, see how much bandwith each one is using, and for what ends? That way, at a glance, I can spot the offending machine and kick it from the connection, without having to go from machine to machine, checking each one's "bandwith used" properties manually, and dealing with the owner's indignant protests all the while. I understand this will likely involve 3rd-party software and/or hardware; my issue is I don't even know where to begin.

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  • Block site on a PC logged into a domain and using a proxy

    - by Rauf
    I read lot of posts related with blocking sites. Most of the posts says to edit hosts file. I know it is a good method. But this one is not working for me. Can you guess what is the issue by analyzing the following details, My PC is joined to a domain and using proxy settings, and the logged in user having administrator privileges. After reading some answers, I did the following Changed the hosts file to have # 38.25.63.10 x.acme.com # x client host 127.0.0.1 localhost 127.0.0.1 www.facebook.com Added no proxy for facebook, Still, it is not working. Why ?

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  • Linux - Block ssh users from accessing other machines on the network

    - by Sam
    I have set up a virtual machine on my network for uni project development. I have 6 team members and I don't want them to SSH in and start sniffing my network traffic. I already have set the firewall on my W7 pcs to ignore any connection attempts from the Virtual Machine, but would like to go a step further and not allow any network access from the VM to other machines on my network. Team members will be access the VM by SSH. The only external port forwarded is to vm:22. The VM is running in VirtualBox on a bridged network connection. Running latest Debian. If someone could tell me how to do this I would be much obliged.

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