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  • Trying to understand why VLANs need to be created on intermediate switches

    - by Jon Reeves
    I'm currently studying for the Cisco switching exam and having trouble understanding exactly how 802.1q tagging works. Given three daisy chained switches (A,B, and C) with trunk ports between them and VLAN 101 defined on both end switches (A and C), I'm not sure why the VLAN also needs to be defined on the middle one (B)? Note that I am not disputing that it does need to be configured, I'm just trying to understand why exactly. As I understand it, traffic from VLAN 101 on switch A will be tagged as it goes through the trunk to switch B. According to the documentation I have read, trunks will pass all VLANs by default, and the .1q tag is only removed when the frame leaves through an access port on the relevant VLAN. From this I would expect switch B to simply forward the tagged frame unchanged through the trunk to switch C. Can anyone shed some light on how switch B processes this frame and why it does not get forwarded through the other trunk ?

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  • Is there a way to allow administrators to change or reset user passwords?

    - by Jon Seigel
    We have a custom MembershipProvider implementation using form-based authentication (FBA) under Sharepoint 2007. I've searched high and low on Google, but only found: Active directory and FBA implementations to allow users to change their own password Active directory instructions (including video!) for administrators to change other users' passwords Have we missed an option to enable the latter under FBA? Should this work by default and is the MembershipProvider misbehaving? The procedure to do this as under active directory would be ideal, but the "Change Password" link does not appear in the Edit User screen. We verified that the logged-in user is a site collection administrator.

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  • Puppet permissions issue reported on client

    - by Jon Skarpeteig
    err: /File[/var/lib/puppet/lib]: Failed to generate additional resources using 'eval_generate': Error 400 on SERVER: Not authorized to call search on /file_metadata/plugins with {:ignore=>[".svn", "CVS", ".git"], :recurse=>true, :checksum_type=>"md5", :links=>"manage"} err: /File[/var/lib/puppet/lib]: Could not evaluate: Error 400 on SERVER: Not authorized to call find on /file_metadata/plugins Could not retrieve file metadata for puppet://example.com/plugins: Error 400 on SERVER: Not authorized to call find on /file_metadata/plugins What exactly causes this error, and how to fix it?

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  • How can I track down the cause of ext3 filesystem corruption?

    - by Jon Buys
    We have a VMware vSphere 5 environment running CentOS 5.8 virtual machines. In the past two weeks we have had five incidents of virtual machines having a filesytem become corrupt, requiring an fsck to repair. Here is what we see in the logs: Nov 14 14:39:28 hostname kernel: EXT3-fs error (device dm-2): htree_dirblock_to_tree: bad entry in directory #2392098: rec_len is smaller than minimal - offset=0, inode=0, rec_len=0, name_len=0 Nov 14 14:39:28 hostname kernel: Aborting journal on device dm-2. Nov 14 14:39:28 hostname kernel: __journal_remove_journal_head: freeing b_committed_data Nov 14 14:39:28 hostname last message repeated 4 times Nov 14 14:39:28 hostname kernel: ext3_abort called. Nov 14 14:39:28 hostname kernel: EXT3-fs error (device dm-2): ext3_journal_start_sb: Detected aborted journal Nov 14 14:39:28 hostname kernel: Remounting filesystem read-only Nov 14 14:39:28 hostname kernel: EXT3-fs error (device dm-2): htree_dirblock_to_tree: bad entry in directory #2392099: rec_len is smaller than minimal - offset=0, inode=0, rec_len=0, name_len=0 Nov 14 14:31:17 hostname ntpd[3041]: synchronized to 194.238.48.2, stratum 2 Nov 14 15:00:40 hostname kernel: EXT3-fs error (device dm-2): htree_dirblock_to_tree: bad entry in directory #2162743: rec_len is smaller than minimal - offset=0, inode=0, rec_len=0, name_len=0 Nov 14 15:13:17 hostname kernel: __journal_remove_journal_head: freeing b_committed_data The problem seems to happen while we are rsync'ing application data from another server. So far we have been unable to reproduce the problem, or identify a root cause. After we had a few servers have this problem, we assumed that there was an issue with the template, so we scrapped all VM's cloned off of the template, destroyed the template, and built a new template from scratch, installed from a newly downloaded CentOS ISO. We use HP EVA SAN's for datastores, and moved from a 4400 to a 6300 after the first problem. Since the move and rebuilding new virtual machines we have seen the issue twice. On one VM we shut down the server, removed two virtual CPUs, and booted it back up again, the problem presented itself almost immediately. On the other VM, we rebooted it, and the problem happened a half hour later. Any tips or pointers in the right direction would be appreciated.

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  • Using IIS7 as a reverse proxy

    - by Jon
    Hi All, My question is pretty much identical to the question listed but they did not get an answer as they ended up using Linux as the reverse proxy. http://serverfault.com/questions/55309/using-iis7-as-a-reverse-proxy I need to have IIS the main site and linux (Apache) being the proxied site(s). so I have site1.com (IIS7) site2.com (Linux Apache) they have subdomains of sub1.site1.com sub2.site1.com sub3.site2.com I want all traffic to go to site1.com and to say anything that is site2.com should be proxied to linux box on internal network, (believe ARR can do this but not sure how). I can not have it running as Apache doing the proxying as I need IIS exposed directly. any and all advice would be great. Thanks

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  • What options are there to do a mail merge?

    - by Jon Cage
    I tried (and failed) to do a mail merge to send a generic(ish) mail merge to send a bunch of emails using Thunderbird with the the Mail Merge addon but couldn't get it to work. What other options exist to quickly and simply set up a mail merge under windows?

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  • How can I verify that my SSD is performing as it should?

    - by Jon Skeet
    EDIT: Okay, so I've no idea what caused the change, but after trying loads of different things to work out what was wrong, I've rerun the WEI (about the 4th time in total) and the score has jumped to a far more respectable 7.3. I'm going to leave well alone now :) I've got a brand new 256GB SSD (Crucial CT256M225) which should have stellar performance. However, on my (also brand new) Dell Studio 1557 with Windows 7 Professional 64 bit, it's only giving a performance index of 5.9. I realise the performance index should be taken with a bit of a pinch of salt, but I wonder whether something's wrong. Given this paragraph from this MSDN article on Windows 7, I'd expect to see a high 6.X or possible a 7.X figure: In Windows 7, there are new random read, random write and flush assessments. Better SSDs can score above 6.5 all the way to 7.9. To be included in that range, an SSD has to have outstanding random read rates and be resilient to flush and random write workloads. In the Beta timeframe of Windows 7, there was a capping of scores at 1.9, 2.9 or the like if a disk (SSD or HDD) didn’t perform adequately when confronted with our random write and flush assessments. Feedback on this was pretty consistent, with most feeling the level of capping to be excessive. As a result, we now simply restrict SSDs with performance issues from joining the newly added 6.0+ and 7.0+ ranges. SSDs that are not solid performers across all assessments effectively get scored in a manner similar to what they would have been in Windows Vista, gaining no Win7 boost for great random read performance. How can I diagnose any performance issues with either the disk or how Windows 7 is handling it? Are there any particularly good tools you'd recommend? One note of curiosity: I couldn't install the firmware update (to 1916) until I changed my BIOS handling of the drive to ATA mode; after installing the firmware I tried to boot the Windows installation DVD - but that only worked after turning it back to AHCI mode (which I've left it in). Installing Windows 7 took longer than I expected - it sat at the "Windows is loading files" prompt for a very long time. Likewise it was on "Expanding files (0%)" for a long time. Since installation it's been fine though - but I don't know whether it's really providing quite as beefy performance as it should. EDIT: My netbook with the 64GB equivalent drive has a performance index of 6.6...

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  • SVN check out to samba directory

    - by Jon H
    I'm trying to svn co to a directory on Ubuntu, shared via samba, to OS X, but I get the following error (in OS X). svn: In directory 'site/product/tests' svn: Can't open file 'site/product/tests/.svn/tmp/text-base/._base.py.svn-base': No such file or directory My smb.conf file includes the following changes: unix extensions = no browseable = yes public = yes writable = yes delete readonly = yes create mask = 0775 directory mask = 0775 valid users = %S read only = no The checkout works fine locally (on the Ubuntu machine). What am I missing? More detail: Later inspection showed that the svn error couldn't find the file with 3, then 2 underscores: .___init__.py.svn-base Whereas listing the directory in OS X showed 2, then 2 underscores: __init__.py.svn-base And listing the same directory in a successful checkout on Ubuntu shows nothing (because it's a temporary directory?) I've tried the mangled = no setting in share settings, to no effect.

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  • Blocking the Apple OS X App Store

    - by Jon Rhoades
    Being the evil corporate IT overlords we need to block the new OS X App Store. As you may be aware the 10.6.6 update installs the App Store App which allows users to download and install apps without admin privileges. Some Suggestions: Don't update to 10.6.6+ Use parental controls Presumably some OD policy (if you have an OD server which we don't) Block the App store by DNS or Proxy Not updating to 10.6.6+ isn't really a long term solution as it contains security fixes and new Macs will come with it anyway. Blocking the App store at a network level doesn't solve laptop users. Ideally a simple system preference or editing of a plist that can be pushed out by ARD would be the best solution. Please note the question isn't should we block the App store, it's how we can block the App store.

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  • Connecting a network printer via a Thecus N2100 - works in Vista, not in Windows 7

    - by Jon Skeet
    I have a Lexmark E250d printer attached to a Thecus N2100 NAS. On Windows Vista I've managed to configure this using an "Internet" printer port with the URL of http://thecus:631/printers/usb-printer. I can add a printer in a similar way in Windows 7, but it never manages to print the test page. If I go to "Configure Port" in Vista, it just has "Security Options" - on Windows 7 it's asking about Raw mode vs LPR mode etc. On Vista I'm using an E250d-specific driver from Lexmark; on Windows 7 there's a Microsoft E250d driver, or a Universal PCL XL driver from Lexmark... I wouldn't expect this different to be related to the problem, but I thought I'd mention it anyway. (Lexmark doesn't have a Windows 7 E250d-specific driver as far as I can see.) Any suggestions? I was thinking of upgrading my main laptop from Vista to Windows 7, but I'd really like to get this sorted first... EDIT: If I connect to http://thecus:631/printers/usb-printer via Chrome while capturing with Wireshark, I get this response: HTTP/1.1 200 OK Date: Wed, 06 Jan 2010 16:47:23 GMT Connection: Keep-Alive Keep-Alive: timeout=60 Content-Language: C Transfer-Encoding: chunked Content-Type: text/html;charset=iso-8859-1 0 No idea what that's meant to be doing... EDIT: On further consultation, this would appear to be the Internet Printing Protocol which is layered on HTTP. Printing a test page successfully from Vista posts to that URL. Will attempt the same on Windows 7...

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  • Is an Intranet music streaming server legal?

    - by Jon Smock
    We are a large organization with thousands of users, and we're peaking on our Internet usage. Many of those users are streaming music while they work. We're wondering if providing a music streaming server internally would help on bandwidth. How legal is that? Here are two scenarios: 1) We purchase a body of music legally and stream it internally (I assume this is illegal) 2) We pull music feeds from free, legal, online sources and "rebroadcast" internally (I assume this is legal) We want to save bandwidth and help our users, but we want to do it in an ethical and legal way.

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  • Replacement for Netmeeting

    - by Jon B
    We've been using Netmeeting for doing presentations with remote workers. Now that MS has disowned it (and it doesn't run on Vista - mostly), we need something else. Since Netmeeting was free, our budget is right around $0. We don't need audio or video, but do need to share apps/desktop and allow a remote user to take control. What are some good cheap/free alternatives?

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  • Aegir/Drupal/Linode issue encontered when trying to restart Apache

    - by Jon
    Ran this command, $ sudo /etc/init.d/apache2 restart Got these results, * Restarting web server apache2 Warning: DocumentRoot [/srv/www/mywebsite.com/public_html/] does not exist [Fri May 07 15:51:57 2010] [warn] NameVirtualHost *:80 has no VirtualHosts Warning: DocumentRoot [/srv/www/mywebsite.com/public_html/] does not exist [Fri May 07 15:51:57 2010] [warn] NameVirtualHost *:80 has no VirtualHosts ...fail! Gadzooks!

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  • How do I add a version number field to an office 2007 docx document?

    - by Jon Cage
    I've been having a crack at using fields in Word 2007 and have hit a slight stumbling block. I want to add a field which I can use in several parts of the document to represent the current version (something of the form v0.1 but I can't see an obvious way to do it). The only provision I've found for this is something called RevNum but that gets updated every time I save the document. Is there a field I've missed or a way of adding custom fields or something?

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  • PC monitors shut off and system hangs while playing 3D games, but sound continues - Diagnosis?

    - by Jon Schneider
    Two days ago, I started running into a problem with my Windows PC: The PC's two connected monitors simultaneously lose signal and go black (as though the PC had been powered off). The keyboard's Numlock, Capslock, and Scroll Lights will become "stuck" in their current positions, as though the PC is hung. (For example, the Numlock light on the keyboard remains lit regardless of me pressing the Numlock key repeatedly.) No keyboard input does anything. (Ctrl+Alt+Del, Ctrl+Shift+Esc, Ctrl+C, etc.) However -- Whatever sound/music the PC was playing continues to play, and the PC's fans continue running, so the PC hasn't powered itself off or rebooted itself. Opening up the case, the graphics card is pretty hot to the touch. I had this happen 3 times in one evening. In all cases, I was playing a game with 3D graphics when the problem occurred (Torchlight, Minecraft, Magic: The Gathering 2012, Avadon: The Black Fortress demo). I have yet to have the problem happen when I'm not playing a game. This system has been running stable for about 2.5 years prior to this. I didn't make any changes to the system prior to the problem starting to occur. System specs: OS: Windows 7 64-bit Processor: Intel Core 2 Duo E7200 Wolfdale 2.53GHz Video Card: XFX GeForce 9800 GT 512 MB Motherboard: Foxconn P45A-S LGA 775 Intel ATX RAM: Corsair 4 GB (2x 2GB) DDR2-800 (PC2 6400) Full specs: New PC 2008 Troubleshooting tried so far (the problem occurred again after taking each of these steps, one at a time): Updated the video drivers with the latest drivers from NVidia's site. Opened up the case and cleaned out the video card and processor fans (both were pretty dirty). Installed and ran temperature monitor software. The processor idles at about 50 degrees C, and goes up to about 63 degrees C while playing a game (seems on the warm side, but not excessively so?). The software wasn't able to report the temperature of the GPU -- not sure this particular GPU supports software temperature readout? My initial diagnosis is that maybe the GPU is on its last legs (given that it seems to be running pretty hot, and the problem only occurs while playing 3D games). Does this seem likely? Or is it likely that this problem is caused by the processor, RAM, or motherboard? Or could this be a software issue of some kind? Thanks for any advice!

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