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  • Password Manager that allows syncing accross platforms

    - by lexu
    I use OS X, Linux, Solaris and windows for work and from home. There are good tools that allow me to manage the many logins/passwords required platform independently. But mostly they expect me to carry a thumb-drive around or require direct access to a central location (a sky drive in the cloud). The thumb-drive is too easily lost (= synchronized backup needed), the central location not always reachable/ mountable. Besides company policy rightly prevents this often. Is there a tool that allows me to add passwords locally and then syncs it's DB with the "mother-ship" later. Or is there another approach that you use, that solves my problem? EDIT My question is more about "synchronize" than cross platform. I've evaluated (=read feature list) some good cross platform tools, but need one that does the synchronizing for me. By synchronize I mean "merge two versions" not "replace (hopefully) old file with new." I'm not sure I'm always disciplined/awake enough to prevent data loss. UPDATE Lifehacker just posted that AgileSolutions now have a beta version of 1Password for Windows.

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  • Object Not found - Apache Rewrite issue

    - by Chris J. Lee
    I'm pretty new to setting up apache locally with xampp. I'm trying to develop locally with xampp (Ubuntu 11.04) linux 1.7.4 for a Drupal Site. I've actually git pulled an exact copy of this drupal site from another testing server hosted at MediaTemple. Issue I'll visit my local development environment virtualhost (http://bbk.loc) and the front page renders correctly with no errors from drupal or apache. The issue is the subsequent pages don't return an "Object not found" Error from apache. What is more bizarre is when I add various query strings and the pages are found (like http://bbk.loc?p=user). VHost file NameVirtualHost bbk.loc:* <Directory "/home/chris/workspace/bbk/html"> Options Indexes Includes execCGI AllowOverride None Order Allow,Deny Allow From All </Directory> <VirtualHost bbk.loc> DocumentRoot /home/chris/workspace/bbk/html ServerName bbk.loc ErrorLog logs/bbk.error </VirtualHost> BBK.error Error Log File: [Mon Jun 27 10:08:58 2011] [error] [client 127.0.0.1] File does not exist: /home/chris/workspace/bbk/html/node, referer: http://bbk.loc/ [Mon Jun 27 10:21:48 2011] [error] [client 127.0.0.1] File does not exist: /home/chris/workspace/bbk/html/sites/all/themes/bbk/logo.png, referer: http://bbk.$ [Mon Jun 27 10:21:51 2011] [error] [client 127.0.0.1] File does not exist: /home/chris/workspace/bbk/html/node, referer: http://bbk.loc/ Actions I've taken: Move Rewrite module loading to load before cache module http://drupal.org/node/43545 Verify modrewrite works with .htaccess file Any ideas why mod_rewrite might not be working?

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  • What's up with stat on Macos/Darwin? Or filesystems without names...

    - by Charles Stewart
    In response to a question I asked on SO, Give the mount point of a path, one respondant suggested using stat to get the device name associated with the volume of a given path. This works nicely on Linux, but gives crazy results on Macos 10.4. For my system, df and mount give: cas cas$ df Filesystem 512-blocks Used Avail Capacity Mounted on /dev/disk0s3 58342896 49924456 7906440 86% / devfs 194 194 0 100% /dev fdesc 2 2 0 100% /dev 1024 1024 0 100% /.vol automount -nsl [166] 0 0 0 100% /Network automount -fstab [170] 0 0 0 100% /automount/Servers automount -static [170] 0 0 0 100% /automount/static /dev/disk2s1 163577856 23225520 140352336 14% /Volumes/Snapshot /dev/disk2s2 409404102 5745938 383187960 1% /Volumes/Sparse cas cas$ mount /dev/disk0s3 on / (local, journaled) devfs on /dev (local) fdesc on /dev (union) on /.vol automount -nsl [166] on /Network (automounted) automount -fstab [170] on /automount/Servers (automounted) automount -static [170] on /automount/static (automounted) /dev/disk2s1 on /Volumes/Snapshot (local, nodev, nosuid, journaled) /dev/disk2s2 on /Volumes/Sparse (asynchronous, local, nodev, nosuid) Trying to get the devices from the mount points, though: cas cas$ df | grep -e/ | awk '{print $NF}' | while read line; do echo $line $(stat -f"%Sdr" $line); done / disk0s3r /dev ???r /dev ???r /.vol ???r /Network ???r /automount/Servers ???r /automount/static ???r /Volumes/Snapshot disk2s1r /Volumes/Sparse disk2s2r Here, I'm feeding each of the mount points scraped from df to stat, outputing the results of the "%Sdr" format string, which is supposed to be the device name: Cf. stat(1) man page: The special output specifier S may be used to indicate that the output, if applicable, should be in string format. May be used in combination with: ... dr Display actual device name. What's going on? Is it a bug in stat, or some Darwin VFS weirdness? Postscript Per Andrew McGregor, try passing "%Sd" to stat for more weirdness. It lists some apparently arbitrary subset of files from CWD...

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  • Web hosting for multiple web sites providing system isolation

    - by Justin
    We have a small number of projects where we expect the client will not be maintaining the installed versions of applications we install to power the site (such as Drupal). Given that an important part of security is keeping things updated, we don't want to host these projects on our Plesk-powered dedicated servers that currently host lots of our other client's websites. Our goal is to find a host where we can deploy isolated instances (be these slices, virtual servers, grid servers, etc) for each individual (or groups of 2-3) web sites as we need them. These instances would be completely separate, so that if one web site were hacked it would not impact any other site. Typical hosting requirements: Linux Apache PHP 5 MySQL Supports Drupal Ability to setup a cron task (but we don't need SSH access) Daily backups Virtualized/cloud hosting (we want to avoid shared) Pricing per site is around $25/month OS is patched automatically Some options we have considered but won't work: MediaTemple: Two major data center-wide security incidents and recent downtime foster doubt about this host's technical ability. Slicehost: This would require us to manage the entire server, which we don't want to do. Rackspace Cloud Sites (formerly Mosso): No backup options. Do you have any recommended hosting options for given these requirements?

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  • Debugging a Drobo that chokes Windows 7x64 When Plugged In

    - by Pridkett
    I've had a love hate relationship with my Drobo for a long time. After two years of using it on a Linux box, I moved it over to a Windows 7 machine where it seemed to work just fine for a long time, but it was under very light usage. Mainly backups that never actually happened. Recently I began using it for additional backup services (through CrashPlan, which is great). This means the Drobo gets a lot more usage. Also it means that something interesting happens, the Drobo can choke my system on startup. Here's what I mean: Start computer without Drobo plugged in, CrashPlan and Drobo Dashboard services disabled: 105s Start computer with Drobo plugged in Crashplan disabled, Drobo Dashboard enabled: 250s (and 1 cpu at 100% for a very long time, drobo churning) Start computer with Drobo plugged in, CrashPlan and Drobo Dashboard disabled: 250s (1 cpu at 100% for a very long time, drobo churning) Start computer with Drobo plugged in, Crashplan and Drobo Dashboard enabled: 300s (1 cpu at 100% for a very long time, drobo churning) If I yank the USB plug on the Drobo the CPU usage goes down to nothing very quickly. The slow startup in the fourth scenario is because CrashPlan is trying desperately to load stuff up on the H: drive before it gives up, so I've disabled it for the time being. So here's my question: What the heck is going on when I plug the drobo in? I've fired up Process Explorer and see that the System process is hogging the CPU, specifically it's an ntoskrnl.exe/KdPollBreakIn thread that's going ape. Is this something that's wrong with Drobo? Windows? Any idea on how to find out? If it matters, here's tech info: Athlon 64x2 4400, 2GB RAM, Win7 Ultimate, Drobo USB (2x1TB, 2x320GB)

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  • How is Apache still working?

    - by PJ
    Recently, I decided to set up a local development environment for my work projects. I'm a PHP developer, with just enough knowledge of Linux and Apache to break things mightily. To get the local environment looking like my work environment, I had to upgrade PHP. When I did, Apache wouldn't restart. I decided I wanted to start fresh (this is where things went wrong) and that I'd reinstall Apache and PHP using MacPorts. So, I went through and tried to delete all the Apache files. Yup. I ran locate apache2 and deleted any folders that looked important. (I know, I know) Then I did a /usr/libexec/locate.updatedb to make sure everything was up to date. I even restarted my machine, just to make sure. The issue is, http://localhost still works. As does an alias I set up, http://butler. Shouldn't they not work? Now that I'm this far in, are there any tips for how to completely remove Apache so I can start over? Worst case, I have a timemachine backup, so I can always just restore that... Thanks in advance.

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  • Can one really fry a monitor by setting the wrong HorizSync and VertRefresh?

    - by rumtscho
    I've encountered this problem on several different systems with several different monitors: a monitor functions perfectly under Windows. I install a Linux and the max resolution is at some impossibly low value, mostly 640x480, changing it in Xorg.conf doesn't work. The X.org log file then shows that the driver cannot determine the correct refresh rate for the monitor, so it ignores everything in Xorg.conf and just loads in some default minimalistic mode. Googling the problem leads to an easy solution: set the HorizSync and VertRefresh in Xorg.conf, and everything works. The problem seems to be a common one, and I've seen dozens of results recommending the solution. Each of them contains the warning that you should use the value ranges provided with the monitor. Because if you don't, and your video card sends a signal with the wrong refresh rate, this can damage your monitor. Of course, you don't have a user manual for your monitor any more. If you are lucky to find one on the attic or on the net, it doesn't contain any information about the supported refresh rate. So you just type in the value suggested in the solution description, which varies wildly depending on your source, and cross your fingers. You restart, and... ... you've set the wrong values. So the monitor shows a short message like "input signal out of range", and you do a hard restart, repair your Xorg.conf in recovery mode, and everything is fine, including your monitor. So does this warning reflect a real possibility, or is it just a geeky urban legend? Or is it something which used to happen in the past, before manufacturers started protecting the monitors against it? Is it technically possible with every monitor technology, or is it maybe something which can only happen to a CRT? If you think that it's true, why? Have you ever witnessed a monitor die from the wrong refresh config, or have you read of it in a reputable source?

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  • Deploying workstations - best practices?

    - by V. Romanov
    Hi guys I've been researching on the subject of workstation deployment for a while, and found a ton of info and dozens different methods and tools, but no "best practice" method that doesn't lack at least one feature that i consider required for the solution to be perfect. I'm currently interested in windows workstation deployment, but if the tools can be extended to Linux, then it's an added value. I want the deployment tools I use to be able to do the following: hardware independent - I want my image or installation to have a minimum of hardware and driver dependency, so that i can use a single image/package for all workstations easily updatable - I want to be able to update my image as easily as possible without redeploying/rebuilding/reimaging all configurations PXE bootable deployment - I want the tools to be bootable off the network so that I don't need a boot cd/DOK. scriptable for minimum human input - Ideally, the tool should run automatically after being booted and perform a "default" deployment (including partitioning) unless prompted otherwise. i.e - take a pc, hook it up, power on, PXE boot and forget about it until the OS is deployed. I found no single product or environment that does all this. Closest i came to is the windows deployment services/WIM image format. I also checked out numerous imaging and deployment tools including clonezilla, ghost, g4u, wpkg and others, but most of them lack the hardware Independence and updatability features. We currently have a Symantec Ghost server setup that does imaging over the network, but I'm not satisfied with it as it has all the drawbacks i listed above. Do you have suggestions how to optimize the process of workstation deployment? How do you deploy them in your organization? Thanks! Vadim.

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  • Tracking Security Vulnerability remediation

    - by Zypher
    I've been looking into this for a little while, but havn't really found anything suitable. What I am looking for is a system to track security vulnerability remdiation status. Something like "bugzilla for IT" What I am looking for is something pretty simple that allows the following: batch entry of new vulnerabilities that need to be remediated Per user assignment AD/LDAP Authentiation Simple interface to track progress - research, change control status, remediated, etc. Historical search ability Ability to divide by division Ability to store proof of resolution for the Security Team to access Dependency tracking Linux based is best (that's my group :) ) Free is good, but cost doesn't matter so much if the system is worth it The systems doesn't have to have all of these features, but if it did that would be great. yes we could use our helpdesk software, but that has a bunch of pitfalls such as triggering SLA alerts and penalties as well as not easily searchable outside of a group. Most of what I have found are bug tracking systems that are geared towards developers, and are honstely way overkill for what I am looking for. Server Faults input is greatly appreciated as always!

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  • multiple ssh aliases is selecting wrong user when forwarding

    - by Chris Beck
    I'm following the dual identity procedure for bitbucket: I have 2 bitbucket accounts ccmcbeck and chrisbeck. The former is personal, the latter is work. On my local Mac, I have this in my ~/.ssh/config Host *.work.com User chris ForwardAgent yes IdentityFile ~/.ssh/work_dsa Host bitbucket-personal HostName bitbucket.org User ccmcbeck ForwardAgent no IdentityFile ~/.ssh/bitbucket_ccmcbeck_rsa Host bitbucket-work HostName bitbucket.org User chrisbeck ForwardAgent no IdentityFile ~/.ssh/bitbucket_chrisbeck_rsa On my local Mac I ssh -T all is good, I get: $ ssh -T git@bitbucket-personal logged in as ccmcbeck. $ ssh -T git@bitbucket-work logged in as chrisbeck. On my local Mac, the ssh version is OpenSSH_6.2p2, OSSLShim 0.9.8r 8 Dec 2011 When I ssh foo.work.com to my Linux box, I get: $ ssh-add -l 1024 ... /Users/chris/.ssh/work_dsa (DSA) 2048 ... /Users/chris/.ssh/bitbucket_ccmcbeck_rsa (RSA) 2048 ... /Users/chris/.ssh/bitbucket_chrisbeck_rsa (RSA) On foo.work.com, I also have this in my ~/.ssh/config Host bitbucket-personal HostName bitbucket.org User ccmcbeck ForwardAgent no IdentityFile ~/.ssh/bitbucket_ccmcbeck_rsa Host bitbucket-work HostName bitbucket.org User chrisbeck ForwardAgent no IdentityFile ~/.ssh/bitbucket_chrisbeck_rsa However, on foo.work.com when I ssh -T, it references the wrong User for git@bitbucket-work $ ssh -T git@bitbucket-personal logged in as ccmcbeck. $ ssh -T git@bitbucket-work logged in as ccmcbeck. On foo.work.com, the ssh version is OpenSSH_4.3p2, OpenSSL 0.9.8e-fips-rhel5 01 Jul 2008 Why is my configuration causing foo.work.com to reference the wrong User?

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  • Windows Server 2008 R2 RAS VPN: access server on internal interface ip

    - by Mathias
    Hey, short question: I'm usually a linux admin but need to setup a Win2k8 R2 server for a student project. The server is running as VM on a root server and has a public internet IP assigned. Additionally I need a VPN server to access some services running on the server. I managed to set up a working VPN gateway via the Routing and RAS service which assigns clients an IP in the private subnet 192.168.88.0/24 with the Interface "Internal" listening on 192.168.88.1. Additionally I set up the external interface as NAT interface. So I can connect to the VPN server, get an IP assigned and the server additionally does NAT and I can access the internet over the VPN connection. The only thing I additionally need, is that I can access the server itself over that internal IP (e.g. client 192.168.88.2, server 192.168.88.1) as I want to access some services which I don't like to expose to the internet and restrict them to connected VPN clients. Does anybody have a hint, which configuration I'm missing here to be able to access the server over the VPN connection? EDIT: VPN clients get assigned the IP from the private subnet with subnetmask 255.255.255.255, I guess that might be the reason I can't access the server on the private IP address although it's in the same network range. Any ideas how to change this? I defined a static address pool in the Routing and RAS service, but I can't change the netmask there. EDIT2: I can't access the server from the client, but I can fully access the client from the server (ping, HTTP). I guess it has to do with firewall configuration. Thanks in advance, Mathias

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  • Cause of slow download speed on a particular EC2 instance?

    - by James
    I have a networking issue I'm trying to solve. I have two EC2 instances, same zone, same type. On one of the two EC2 instances (the 'bad' instance), the download speed is really poor (200k/s), while on the other (the 'good' instance), the download speed is fine, comfortable at 30M/s +). To clarify, I'm talking about downloading files to the EC2 instance while ssh'd into the server, e.g running wget with a large file. I've tried different files, including S3 objects and a large linux ISO from elsewhere. Running ethtool eth0 only returns 'Link detected: yes' for both. When running ifconfig, both return the same for most part, aside from how the good instance shows no error packets yet the bad instance shows many: UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:168372370 errors:5075643 dropped:0 overruns:0 frame:0 TX packets:122116480 errors:0 dropped:0 overruns:0 carrier:0 Both servers are configured the same, at least were supposed to be. How can I go about diagnosing the cause for the slow download speed? Is there anything particular to EC2 instances that could cause this? Having trouble knowing where to start. Thanks for any help!

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  • How to get a higher resolution on Ubuntu 11.04 using an intel chipset

    - by Saif Bechan
    I have a bit slow PC here, so I decided to put Ubuntu 11.04 on it. It use to run Windows Vista on a resolution of 1280x1024, so both my hardware and monitor support it. Now I'm on Ubuntu, but can only run 1024x768, and the screen is not that bright. Its like when you don't have the right drivers on a Windows machine. Now i'm new to linux, so I do not know what do do. I have an onboard Intel chipset i965. Maybe this is some useful information, I read something about it on a forum: lspci 00:00.0 Host bridge: Intel Corporation 82G33/G31/P35/P31 Express DRAM Controller (rev 02) 00:02.0 VGA compatible controller: Intel Corporation 82G33/G31 Express Integrated Graphics Controller (rev 02) 00:1b.0 Audio device: Intel Corporation N10/ICH 7 Family High Definition Audio Controller (rev 01) 00:1c.0 PCI bridge: Intel Corporation N10/ICH 7 Family PCI Express Port 1 (rev 01) 00:1c.1 PCI bridge: Intel Corporation N10/ICH 7 Family PCI Express Port 2 (rev 01) 00:1d.0 USB Controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #1 (rev 01) 00:1d.1 USB Controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #2 (rev 01) 00:1d.2 USB Controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #3 (rev 01) 00:1d.3 USB Controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #4 (rev 01) 00:1d.7 USB Controller: Intel Corporation N10/ICH 7 Family USB2 EHCI Controller (rev 01) 00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev e1) 00:1f.0 ISA bridge: Intel Corporation 82801GB/GR (ICH7 Family) LPC Interface Bridge (rev 01) 00:1f.1 IDE interface: Intel Corporation 82801G (ICH7 Family) IDE Controller (rev 01) 00:1f.2 IDE interface: Intel Corporation N10/ICH7 Family SATA IDE Controller (rev 01) 00:1f.3 SMBus: Intel Corporation N10/ICH 7 Family SMBus Controller (rev 01) 02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 01) 03:03.0 FireWire (IEEE 1394): VIA Technologies, Inc. VT6306/7/8 [Fire II(M)] IEEE 1394 OHCI Controller (rev c0) Can someone please tell me how I can get the screen better? saif@sodium:~$ xrandr Screen 0: minimum 320 x 200, current 1024 x 768, maximum 4096 x 4096 VGA1 connected 1024x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm 1024x768 60.0* 800x600 60.3 56.2 848x480 60.0 640x480 59.9

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  • How to send T.38 from a mac?

    - by Brian Postow
    I'm trying to set up a fax-server on a macintosh. I have Hylafax, and we're going to use an internet FOIP fax provider (Haven't decided who yet, that may be another question). The problem is how to get from Hylafax to T.38. I know of two options, but I'm not sure how to decide between them: T38modem Advantages: It's only one extra program, and i know that I can compile it for the Mac. (well, At least I can get the H323 version working on a Mac) Disadvantages: It is mostly undocumented and seems to be supported only by one guy in Russia. IAXModem/Asterisk Advantages: It's well known, and well supported. We can pay for support. It presumably does the T38 with SIP correctly, so we don't have to worry about it. Disadvantages: It's two separate programs. While I know how to get Asterisk on a mac, I'm not sure about IAXModem. (It's sourceforge, and linux, but compiling things for a mac isn't always straight forward...) It's also mostly undocumented. Do these seem like an accurate listing of the pros/cons? Anyone have any other suggestions? thanks.

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  • Online resizing of kvm guest root filesystem?

    - by Bittrance
    I have a Linux guest that uses an LVM volume directly as root file system (that is, there is no partition table). libvirt config looks thus: <os> <type arch='x86_64' machine='rhel6.4.0'>hvm</type> <kernel>/boot/vmlinuz-X.Y.Z.el6.x86_64</kernel> <initrd>/boot/initramfs-X.Y.Z.el6.x86_64.img</initrd> <cmdline>console=ttyS0 root=/dev/vda</cmdline> <boot dev='hd'/> </os> <disk type='block' device='disk'> <driver name='qemu' type='raw' cache='none' io='native'/> <source dev='/dev/vg/guest'/> <target dev='vda' bus='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </disk> From inside the guest: $ mount /dev/vda on / type ext4 (rw) proc on /proc type proc (rw) sysfs on /sys type sysfs (rw) devpts on /dev/pts type devpts (rw,gid=5,mode=620) tmpfs on /dev/shm type tmpfs (rw) none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw) Is it possible to resize the guest's root partition without rebooting the guest? Just doing lvextend on the host and resize2fs from the guest does not seem to be enough.

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  • Setting up Apache with multiple virtual host when using Plone 4.1

    - by Shaun Owens
    I have a Plone server running on CentOS, I have multiple instances of Plone running 4.0 and 4.1, I also have multiple sites. I am new to linux and haveing problems getting Apache to work with multiple virtuale hosts. The first host listed works just fine but the second host does not. I get the following error message when I start HTTPD: Starting httpd: [Mon Nov 07 14:38:31 2011] [warn] VirtualHost ordevel3.ucdavis.edu:80 overlaps with VirtualHost ordevel4.ucdavis.edu:80, the first has precedence, perhaps you need a NameVirtualHost directive. What am I missing to get the virtual hosts to work correctly? Below in my syntax in httpd.conf. <VirtualHost ordevel3.abc.edu:80> ServerAlias ordevel3.abc.edu ServerAdmin [email protected] ServerSignature On <IfModule mod_rewrite.c> RewriteEngine On # serving icons from apache 2 server RewriteRule ^/icons/ - [L] RewriteRule ^/(.*) \ http://localhost:8080/VirtualHostBase/http/%{SERVER_NAME}:80/itsdevel3/VirtualHostRoot/$1 [L,P] </IfModule> <IfModule mod_proxy.c> ProxyVia On # prevent the webserver from beeing used as proxy <LocationMatch "^[^/]"> Deny from all </LocationMatch> </IfModule> </VirtualHost> <VirtualHost ordevel4.abc.edu:80> ServerAlias ordevel4.abc.edu ServerAdmin [email protected] ServerSignature On <IfModule mod_rewrite.c> RewriteEngine On # serving icons from apache 2 server RewriteRule ^/icons/ - [L] RewriteRule ^/(.*) \ http://localhost:8180/VirtualHostBase/http/%{SERVER_NAME}:80/ITS/VirtualHostRoot/$1 [L,P] </IfModule> <IfModule mod_proxy.c> ProxyVia On # prevent the webserver from beeing used as proxy <LocationMatch "^[^/]"> Deny from all </LocationMatch> </IfModule> </VirtualHost>

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  • Microsoft Windows DHCP: Steering IPv4 clients into specific scopes based on MAC

    - by Easter Sunshine
    We have visitors on our campus who bring their own laptops and devices and use our wireless and wired networks. When we receive a copyright infringement notice (typically BitTorrenting), we are required to quarantine that MAC address so that it no longer has Internet access. No matter what website it tries to visit, it is sent to a web page explaining to the user that the device has been quarantined. We have thus far implemented this in ISC DHCP on Linux. We have multiple VLANs with one or more public-IP subnets and one RFC1918 quarantine subnet each. All clients are leased IPs in the public-IP subnet(s) unless you're in a list of known bad MACs. Then, you are sent to the quarantine subnet so that your traffic is unroutable on the Internet (you are isolated by subnet only, not by VLAN). We would like to move to Windows DHCP in light of the IPAM role but I cannot figure out how to replicate this in Windows DHCP 2012 (Assign DHCP IPs for specific MAC prefixes on Windows Server 2008 R2 suggests it was not possible in 2008 R2), even while using policies. So here's what I'd like: The administrator/help desk provides and maintains a list of MAC addresses that are to be quarantined. The DHCP server places those MACs into the quarantine subnet on the respective VLAN, no matter which VLAN the client is in. I don't think reservations would work: We currently have about 300 registered bad MACs and about 12 VLANs. I don't want to make 300 x 12 reservations nor have to add 12 reservations per new MAC address. Not to mention all of the quarantine subnets are /24s. We do not have NPS/NAC. You do not have to register your MAC address get network access. We use Cisco routers/switches. Thanks.

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  • Best way to 'harden' embedded ext4 file server against unexpected loss of power?

    - by Jeremy Friesner
    Hi all, First, a little background: my company makes an audio streaming device that is a headless, rack-mounted Linux box with a couple of SSDs attached. Each SSD is formatted with ext4. The users can connect to the system using Samba/CIFS to upload new audio files or access existing ones. There is also custom software for streaming out audio over the network. This is all fine. The only problem is that the users are audio people, not computer people, and see the system as a 'black box', not as a computer. Which means that at the end of the day, they aren't going to ssh in to the box and enter "/sbin/shutdown -h"; they are just going to cut power to the rack and leave, and expect things to still work properly the next day. Since ext4 has journalling, journal checksumming, etc, this mostly works. The only time it doesn't work is when someone uploads a new file via Samba and then cuts power to the system before the uploaded data has been fully flushed to the disk. In that case, they come in the next day and find that their new file has been truncated or is missing entirely, and are unhappy. My question is, what is the best way to avoid this problem? Is there a way to get smbd to call "sync" at the end of every upload? (Performance on uploads isn't so important, since they only happen occasionally). Or is there a way to tell ext4 to automatically flush within a few seconds of any change to a file? (Again, performance can be sacrificed for safety here) Should I set a particular write-ordering mode, activate barriers, etc?

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  • URL sniffer/downloader

    - by Ricket
    Some websites have Flash content that plays music or videos. Most of the time they don't show you the URL of these music or videos, but for example, you can sniff a YouTube webpage and find the flv file that YouTube is actually requesting and playing. Right now I'm using Orbit Downloader, which has a feature called Grab++ that does just this; you start it, and then you refresh the page, and it shows you all files of certain types (image, audio, video) that the webpage requests, and then you can select one or more and download and it downloads them. But, I don't like Orbit, it installs plugins and has the whole download manager thing which I don't really want. What is a good alternative program? I'm not looking for websites like kickyoutube.com, I want a URL sniffer I guess. HTTPGuideDog used to be my Firefox add-on that did exactly this, but it hasn't been updated even to FF3 (and yes I know I can hack it to load anyway, I'm looking for something natively available preferably). I vaguely know of WireShark but last time I used it, I believe it captures individual packets, which is a little too fine-tuned for me. I just want to be able to see what's happening, and download something that the webpage downloaded. Oh, and I'm using Windows 7. Linux probably has some fancy command-line tool, but it just won't cut it for me. :-\ Edit: Oh, and something free please. Feel free to mention paid solutions though.

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  • Why are SMART error rates going down?

    - by Jeff Shattock
    I have a hard drive that's part of a Linux software raid5 array. SMART has reported that its multi_zone_error_rate was 0, then 1, then 3. So I figured I better start backing up more frequently and prepare to replace the drive. Now, today, the multi_zone_error_rate of that very same drive is back down to 1. It seems that 2 errors unhappened while I wasn't looking. I've also seen simliar behaviour by inspecting the syslog on the server. Jun 7 21:01:17 FS1 smartd[25593]: Device: /dev/sdc, SMART Usage Attribute: 7 Seek_Error_Rate changed from 200 to 100 Jun 7 21:01:17 FS1 smartd[25593]: Device: /dev/sde, SMART Usage Attribute: 7 Seek_Error_Rate changed from 200 to 100 Jun 7 21:01:18 FS1 smartd[25593]: Device: /dev/sdg, SMART Usage Attribute: 7 Seek_Error_Rate changed from 200 to 100 Jun 8 02:31:18 FS1 smartd[25593]: Device: /dev/sdg, SMART Usage Attribute: 7 Seek_Error_Rate changed from 100 to 200 Jun 8 03:01:17 FS1 smartd[25593]: Device: /dev/sdc, SMART Usage Attribute: 7 Seek_Error_Rate changed from 100 to 200 Jun 8 03:01:17 FS1 smartd[25593]: Device: /dev/sde, SMART Usage Attribute: 7 Seek_Error_Rate changed from 100 to 200 These are raw values, not the human-useful values that smartctl -a produces, but the behaviour is similar: error rates changing, then undoing the change. None of these are the drive that had the multi_zone weirdness. I haven't seen any problems from the RAID; its most recent scrub ( < 24 hours ago) came back totally clean. The only thing I can think of is that the SMART reporting circuitry on the drive isn't working properly all the time. The cables are in tight on the drive and board. What's going on here?

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  • Need to boot into chkdsk from USB on Windows netbook

    - by Gaz Davidson
    While attempting to install Ubuntu on a 32-bit Windows XP netbook, the partition resize operation failed due to inconsistencies in the NTFS filesystem (lesson learned: run chkdsk /f in Windows before trying to resize a partition in Linux). Now the installer only gives the option to replace Windows with Ubuntu, the partition can't be resized in gparted, which displays a red exclamation mark and an error log when you click it. To make matters worse, we're also unable to reboot into Windows to get at chkdsk. We get a BSoD when choosing any of the options (including the DOS recovery console thing). The netbook has no CD-ROM drive, contains no recovery image and our only connection to the Internet is via the hotspot on my mobile device. We don't have Windows recovery CDs, but we do have a USB flash drive. We have a 64-bit laptop running Ubuntu 12.04 and Windows 7 (both 64-bit). So, on to the question: Is anyone aware of a way to get into a DOS recovery console and run chkdsk from a USB disk drive, without having to pirate Windows XP or download hundreds and hundreds of megabytes of crap? If it was my device I'd just flatten it, but it isn't. Please help!

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  • Edit-text-files-over-SSH using a local text editor

    - by Mikko Ohtamaa
    I am working in various Linux and UNIX environments. I'd like to elegantly solve the problem of editing remote configuration files over SSH. Instead of using terminal editors (nano), I'd like to open the file in a local text editor on my desktop (Sublime Text 2). CyberDuck, WinSCP and various other SFTP apps can do this. Using editors over X11 forwarding has also proven to be problematic. Also using archaic text editors like Vim or Emacs do not serve my needs well. They could do this, but I prefer using other text editing software. Using ssh mounts (FUSE) are also problematic unless they can happen on the demand and triggered by the remote site. So what I hope to achieve Have a somekind of easily deployable shell script etc. which I can copy to remote server (let's call it mooedit) I run mooedit command on the remote server of which I have connected over SSH connection mooedit sends some kind of signal (over SSH( to my local desktop On my local desktop this signal is captured and it determines 'a ha! moo wants to edit a file on server X in folder Y' File is SFTP transfered to the local desktop (/tmp) File is opened in a nice GUI text editor on the local desktop When Save is pressed, the local desktop notices changes in the file and SFTP sends the resulting file back to the server The question is: What signaling mechanisms SSH provides for this? Any other methods to trigger a local text editor for remote SSH file?

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  • How should I monitor memory usage/performance in SunOS/Solaris?

    - by exhuma
    Last week we decided to add some SunOS (uname -a = SunOS bbs-sam-belair 5.10 Generic_127128-11 i86pc i386 i86pc) machines into our running munin instance. First off, the machines are pre-configured appliances, so, I want to avoid touching the system too much without supervision of the service provider. But adding it to munin was fairly easy by writing a small socket-service (if anyone is interested, I put it up on github: https://github.com/munin-monitoring/contrib/tree/master/tools/pypmmn) Yesterday, I implemented/adapted the required plugins for our machines. And here the questions start: First, I have not found a way to determine detailed memory usage values. I get the total memory by running prtconf | grep Memory, and the free memory using vmstat. Fiddling together a munin-plugin, gives me the following graph: This is pretty much uninformative. Compare this to the default plugin for linux nodes which has a lot more detail: Most importantly, this shows me how much memory is actually used by applications. So, first question: Is it possible to get detailed memory information on SunOS with the default system tools (i.e. not using top)? Onto the next puzzle: Seeing the graphs, I noticed activity in the "Paging in/out" graphs, even though the memory graph still has unused memory: Upon further investigation, I found out that df reports that /tmp is mounted on swap. Drilling around on the web, I understood that df will display swap, but in fact, it's mounted as a tmpfs. Now I don't know if this explains the swap activity. The default munin-plugin for solaris uses kstat -p -c misc -m cpu_stat to get these values. I find it already strange that this is using the cpu_stat module. So maybe I simply misinterpret the "paging" graphs? Second question: Do the paging graphs indicate that parts of the memory are paged to disk? Or is the activity caused by file operations in /tmp?

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  • Multicast image restoration with adaptive speed

    - by Clinton Blackmore
    I'm curious to know if there are any tools for restoring disk images (or even transferring files) via multicast -- for any platform, especially if the project has source available -- where the multicast rate adjusts itself on the fly. On the Mac, all multicast solutions I am aware of (such as Deploy Studio, and NetRestore before it) make use of multicast ASR (apple software restore), which has one glaring deficiency -- you have to set the multicast speed before you start sending a disk image over the network, and that speed is locked in. Either your clients can keep up and restore, or they can't*. It seems to me that it must be possible for the multicast server to adjust the data rate, so you basically say "start sending this image", clients connect, and, if they can't keep up, they tell the server so it slows down. (Likewise, I'd expect the server to try speeding up if no client is having difficulties keeping up, and I'd expect to be able to cap that maximum throughput so that other network activities can go on without being resource starved.) So, what sort of tools are out there? For Linux? Windows? Is there something for the Mac I've overlooked. [It just kills me that it is true that, by the time you get multicast up and going at a good speed to restore a lab, you could've unicasted the data to all the computers and be done.] * There is a little leeway involved. I think individual clients can say, "I missed a little bit of data" and get it, and they can opt to listen in the next time the image is sent over the network, but on the whole, if they missed it the first go round, you have to image the machine again, and there is no time savings.

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  • Replicated MongoDB server slower than simple shards

    - by displayName
    I tried to compare the performance of a sharded configuration against a sharded and replicated configuration. The sharded configuration consists of 8 shards each running on three different machines thereby constituting a total of 24 shards. All 8 of these shards run in the same partition on each machine. The sharded and replicated version is 8 shards again just like plain sharding, and all 8 mongods run on the same partition in each machine. But apart from this, each of these three machine now run additional 16 threads on another partition which serve as the secondary for the 8 mongods running on other machines. This is the way I prepared a sharded and replicated configuration with data chunks having replication factor of 3. Important point to note is that once the data has been loaded, it is not modified. So after primary and secondaries have synchronized then it doesn't matter which one i read from. To run the queries, I use an entirely different machine (let's call it config) which runs mongos and this machine's only purpose is to receive queries and run them on the cluster. Contrary to my expectations, plain sharding of 8 threads on each machine (total = 3 * 8 = 24) is performing better for queries than the sharded + replicated configuration. I have a script written to perform the query. So in order to time the scripts, I use time ./testScript and see the result. I tried changing the reading preference for replicated cluster by logging to mongo of config and run db.getMongo().setReadPref('secondary') and then exit the shell and run the queries like time ./testScript. The questions are: Where am i going wrong in the replication? Why is it slower than its plain sharding version? Does the db.getMongo().ReadPref('secondary') persist when i leave the shell and try to perform the query? All the four machines are running Linux and i have already increased the ulimit -n to 2048 from initial value of 1024 to allow more connections. The collections are properly distributed and all the mongods have equal number of chunks. Goes without saying that indices in both configurations are the same.

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