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• Smartcards for storing gpg/ssh keys (Linux) - what do I need?

  - by Ninefingers

  Hi All, I'm interested in storing my SSH keys and gpg keys on a smartcard for added security. However, I'm a bit uncertain on a few points, which are as follows: How many keys can I get on a card? I assume both SSH and GPG can store keys on the card. Is there a limit to key size? I see a lot of cards saying they support 2048-bit keys, what about larger sizes? Hardware: can anyone recommend a card/reader combination that works well? I've done a fair amount of research and it seems PC/SC readers can be a bit iffy - is this your experience? Have I missed anything I should be asking? Are there any other hurdles? I'm aware fsf europe give away cards with membership - I'm not sure I want to join, but... are these cards any good?

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• Choosing a low cost wildcard SSL cert (PsotiveSSL, RapidSSL, or other)?

  - by Malcolm

  I'm looking to put in place a wildcard SSL certificate for a server that will be providing REST style web services to multiple subdomains. We use NameCheap.com for our DNS services and they offer a choice of 2 very competitively priced wildcard certs: PositiveSSL Wildcard $129.99/yr RapidSSL Wildcard $148.88/yr Is there any reason to choose one of these branded certs over the other? Or are there problems with these low cost certs that we should aware of? If so, what SSL vendor/products do you recommend and why do you recommend them? Thank you, Malcolm

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• What tiny thing in Windows 8 makes you smile or has caught you off guard?

  - by Louis

  In the spirit ([1],[2]) of our friends at Apple.SE, I would like to call for a place to list some little things that surprise you about Windows 8. There are so many articles and lists of all the new features with information overload, I would rather focus this spot of the site on tiny delights with a note why it makes a difference to you. Please post only one tip per answer, and check to see if your answer has already been posted. I am aware that this is not based on a problem that I face. But since it seems to survive moderation on Apple.SE for various incarnations of Apple OS's, I thought I'd see if it was deemed useful here as well.

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• Migrating XenServer VMs from Intel to AMD servers

  - by John Smith

  I need to replace my XenServer 6.1 resource pool hardware. I currently run Intel hardware and I have to move to AMD hardware (corporate politics and budget stuff, blah blah blah). I have downtime available so I can use cold migration - live migration is not required. I will also have the new hardware (AMD) alongside the old hardware (Intel). The XenServer docs say there may be problems exporting from one arch and importing to another "may not work" - http://docs.vmd.citrix.com/XenServer/6.1.0/1.0/en_gb/guest.html#importing_vms - but mentions nothing about simply turning off the VM on one arch and then powering it back on new arch. VMs are a mix of OS - some Windows, some Linux, multiple versions. Is this something that can be done with no problems, or are there problems I need to be aware of?

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• Converting a VMware player image from non-persistant to persistant

  - by Journeyman Geek

  I'm pondering setting up a virtual machine to generate app-v (since i got mdop from school) or thinapp application virtualisation packages. Ideally with either of these, i should work off a fresh system do the install, then copy out the packages produced. I'd like to not have to reinstall windows per package to get a fresh, unmodified stock copy of windows. I'm aware that its possible to make a hard disk image persistant in vmware player (one of my lecturers did it, but he's in another country). I'm wondering how would i convert a persistant image to a non persistant one? I'm currently running vmware player 4, with windows 7 guest and host.

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• use of [!NOTFOUND=return] in nsswitch.conf

  - by Chris Phillips

  Has anyone come across the use of this config for passwd and groups config in nsswitch.conf? Where I'm working I've been told it's been shown to help situations where a group exists both locally and in ldap which was causing issues for group memberships etc. However this config seems to totally mess up nscd which will be aware of the groups and all their members but will not flip the data around to say the user is a member of all it's remote groups. Initially it seems, given a fully available environment, to be exactly the same as [FOUND=return] which is an implict default between stages anyway. However apparently a lengthy ticket with Redhat resulted in the recommended use of that configuration.

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• Why does changing the physical socket on your router cause delays?

  - by Josh Browning

  My question involves the delays involved with changing which physical socket your ethernet cable is connected to. I am aware that if you are connected to a router on a network and then change which physical socket on that router you are using you will gain very small additional delays initially. However I am curious as to what causes these delays. I originally thought it was to do with the infromation stored in the routing table and whether that was allocated to a specific socket on the router or not. Although, if your IP address is the same then I don't understand why there would be delays because I would of assumed that any information within the router was linked to an IP address rather than a physical socket.

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• windows server 2008 vs ubuntu 11 [closed]

  - by user472875

  I am working on implementing a custom server application that should be capable of handling a very large volume of traffic. I am aware that this type of question has been asked a lot, but I haven't been able to find a good answer. What I'm really looking for is for a server with given specs which OS will be able to handle a larger traffic faster and more reliably. I do not care about rights management or any other features. I am fairly good with both platforms, and so I would like to pick the OS with better performance on a clean install, and with nothing else running. Thanks in advance.

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• Which browsers support Window's Low Integrity level?

  - by Ian Boyd

  Normally i like running ie, but it's rendering speed at high-dpi is poor. More recently i've switched to Chrome, but it does not support high-dpi displays. i'm interested in trying other browsers, but they must support protected mode. Are there any other browsers, besides IE and Chrome, that support Mandatory Integrity Levels (i.e. protected mode)? Browsers that i do know about: Browser Protected Mode High-dpi Aware ============== =============== ============== Internet Explorer Yes Yes Chrome Yes No Firefox No No Opera No No Are there any other? And just as an fyi, the clear, unambiguous, non-argumentative, non-subjective, question is: Are there any browsers, aside from Internet Explorer, available for Windows, that run at the Windows Low Mandatory integrity level, and support high-dpi (i.e. non-96 dpi) displays?

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• Printer monitoring script (PowerShell)

  - by HannesFostie

  I am going to write a script of some sort to check event viewer in a windows server 2003 for all printjobs, and then write them to a comma delimited textfile like printername_floor_room.txt I am wondering what the best way is to do this realtime, and keep checking the event viewer constantly. Any caveats I need to be aware of? Thanks EDIT: Okay, so I will most likely go for PowerShell and use Get-EventLog and then edit the "table" data. Problems I'm having: if I were to save all this data to a text file, how do I get the data out of it? A comma-separated file I could work with, but this, I'm not really sure. And once that is sorted out, I'm still not sure how to keep the file updated more or less real-time. Can I make this service-like, without hogging up all resources? Run it every x seconds for example?

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• Shrink Partition on Production Server

  - by Campo

  SO our production server was only setup with one large partition. I have setup a standby server and properly partitioned it. Now the boss wants the production environment's partition shrunk. It is an HP DL380 G5 We have 4 hot swap drives in a raid 5. How best should I go about doing this. Seems like a bad idea to me. Should I use windows or HP to do the partitioning? What should I be aware of in a production environment? The idea is to put the site (Inetpub) on a separate partition instead of the C: drive. How much downtime should I expect? Is this a terrible idea? Anything else I have missed?

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• Share an ATI Catalyst Profile across several/all users

  - by CJM

  We've set up some hotkeys in the ATI Catalyst Control Panel on a communal machine, and we're trying to share this among a number of users, possibly all users. The profile is stored as MyProfile.xml in the Local Settings tree; the profile can be loaded through a shortcut, but unfortunately the Profilename switch simply expects the name of the profile rather than the path to the XML file. And while we can copy the profile to appropriate folders under other users accounts, the mere presence of the XML isn't enough to make the profile available to the user. A quick scan of the registry didn't reveal much, though I suspect there is something in there to be aware of. Any ideas on how we can share this profile?

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• How Can I Restrict VSFTPD to a Particular Local Group?

  - by Aaron Copley

  I'd like to control VSFTPD access by adding users to a group such that only members of the defined group can access the FTP services. I am thinking I can do this by modifying /etc/pam.d/vsftpd, but am not sure how to get started. Or is this only for virtual users in VSFTPD? I am aware of user_list and this does not seem to support groups. This doesn't provide the function I am looking for which is described above. If I am mistaken though this would be great. Thanks, Aaron

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• Prevent Server Restart after Windows Updates

  - by eidylon

  we have a number of servers in our office, as a small hosting company, and these servers are critical to business, ... web server, mail server, db server, etc. On a semi-regular basis, when the machines get automatic updates, they just automagically reboot themselves in the middle of the night. A number of them have software which must be running on the console session (bad practice, I know, but out of my control). When they reboot themselves, these programs obviously shut down, leaving customers upset and services interrupted. How do you set a Windows Server 2003 R2 machine to NEVER automagically reboot itself after updates? And perhaps, if possible, to instead email someone so that they are aware it needs a pending reboot and can schedule it for the best time? Thanks in advance!

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• Can many addon domains slow down cPanel or create problems?

  - by Marco Demaio

  I actually resell hosting plans by using one single cPanel account and many addon domains under it. Basically for each new user I don't create a new cP account, but I simply create a new ADDON domain and give him the necessary space. I know in this way the final user won't be able to manage his emails and he won't be able to access all cPanel features, but that's ok. I know in my account I'm allowed to add unlimited addon domains, but adding many addon domains is there something that might happen that slows down cPanel or could create problems? Any suggestions you could give me about the way i'm using cPanel which might not be the usual way of using it. (As for instance: "be aware that mails from different addon domains under the same CP account could create many problems.", etc.) Thanks!

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• Use the keyboard to activate the menu bar

  - by stevekuo

  In OSX, is it possible to navigate the menu bar without using the mouse (such as the arrow keys)? I'm looking for something similar to how Windows does this – pressing Alt allows the arrow keys to navigate the menu bar, pressing Enter invokes the menu item. This is more ergonomic as my hands don't have to leave the keyboard to invoke menu items. I'm aware of the various keyboard shortcuts, but unfortunately not all menu items have them. Followup: I discovered Full Keyboard Access which solves half the problem. With Full Keyboard Access set to All Controls, is there a key that activates the menu bar?

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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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• Why do SNMP agents need MIB files?

  - by user1495181

  After reading up on SNMP and some of the questions help here I think understand the agent role as a SNMP service to device (Like SQL, it is an API to storage). When you execute a SQL query the SQL engine does all the work and returns the result - You don't need to be aware of how the storage and where the storage is done. But MIBs are not actual storage , so what is the role of my agent? if the agent only register the MIB like i follow in this tutorial, is it not used as handler at all? Say that I want monitor my application's pending request queue, so I want an agent that all SNMP request for application_pending_request will be fired for it and it will return the queue depth. Why do I need to have an actual MIB when all I need to poll my application queue in order to get result?

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• Apache, modifying response codes from 404 to 301

  - by user72539

  Hi, I'm running a magento installation on an apache server. There are many pages indexed in both google and linked to from external sites. I can't use 301 redirects in a .htaccess file as I can't be sure I will catch all the links. At the moment all requests are rewritten through magento and if a request isn't found magento returns a 404 File not Found. Is there a way of using one of the apache modules to filter the response* from magento and if a 404 Not Found is being sent back then replace the response with a standard 301 Redirect to the home page? E.g. Request to Magento -- Apache -- Rewrite to Magento index.php page -- page processed. Response if request exists -- return results (200) if request doesn't exist -- return 404 -- apache filter change response -- return 301 redirect to / I appreciate any help. Thanks, Jon as far as I am aware mod_rewrite is only used to rewrite requests and doesn't allow the modification of responses.

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• Easily recreate a server's "state" [closed]

  - by Brandon Wamboldt

  I want the ability to setup new servers for dev/testing/prod very easily. The reasons for being able to setup a new dev VM is obvious, but for prod my concern is adding a new production server/migrating to a new server. I assume a traditional backup solution won't work as hardware may be different so the binaries/config might be different. I want to get experience with puppet anyways, so I was thinking about creating a manifest that would setup my users, install Postgres, Nginx, PHP-FPM, etc, and configure them the way I specify. Then I could install puppet on a new server, copy down my manifest and apply it locally. This would make keeping my server configs in sync easier too. Is there a better approach I'm not aware of, and does my approach have any pitfalls?

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• Advise about performance for local or remote SQL Server?

  - by TruMan1

  I currently have my web server and SQL Express / MySQL server on the same server. It is on a VPS. I have been having problems with my hosting so I am thinking of separating the web and db server into 2 VPS servers. Does anyone recommend this? I am worried that changing my setup from a local DB server to a remote one will degrade performance heavily. They will not be on the same network, but will reference each other via an IP address. Anything I should be aware of?

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• Can I run mysqld on top of glusterfs?

  - by Richard Holloway

  I have been playing with glusterfs recently. What I want to try is to run mysqld on top of the glusterfs in a similar way as it is possible to run MySQL on top of DRBD. I am familiar with MySQL replication and the advantages of using that instead of this approach and I am also aware of MongoDB and other NoSQL solutions. However, it would be an easy solution to a few specific projects I have coming up if I could leave MySQL as it is and replicate the underlying file system. Is this possible and if it is where can I find out how?

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• Latency in TCP/IP-over-Ethernet networks

  - by aix

  What resources (books, Web pages etc) would you recommend that: explain the causes of latency in TCP/IP-over-Ethernet networks; mention tools for looking out for things that cause latency (e.g. certain entries in netstat -s); suggest ways to tweak the Linux TCP stack to reduce TCP latency (Nagle, socket buffers etc). The closest I am aware of is this document, but it's rather brief. Alternatively, you're welcome to answer the above questions directly. edit To be clear, the question isn't just about "abnormal" latency, but about latency in general. Additionally, it is specifically about TCP/IP-over-Ethernet and not about other protocols (even if they have better latency characteristics.)

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• How to safely backup MySQL using VSS-based backup solutions

  - by Rhyven

  One of my clients is running MySQL on a Windows Server 2008 system. Their regular backups are performed using StorageCraft's ShadowCopy, which uses the VSS service to perform backups of open files. Some investigation indicates that MySQL is not entirely VSS-aware, and that the tables need to be locked prior to the shadow operation, then unlocked afterwards. There is a post at http://forum.storagecraft.com/Community/forums/p/548/2702.aspx which indicates the steps that need to be performed, however the user had some difficulty in performing them and no follow up solution was ever posted. Specifically, they succeeded in writing a batch file to lock the database, however once the batch file returns from MySQL it drops the connection and thus relinquishes the lock. I'm looking for a method that I can send the MySQL command FLUSH TABLES WITH READ LOCK, then perform the backup, then send UNLOCK TABLES when the backup is complete. Alternatively, I can exclude the MySQL data storage folder from backup, and schedule a mysqldump backup into a folder that will then be backed up by VSS. Can I have some recommendations please?

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• iDRAC on Dell R710 and R720

  - by BT643

  I've called Dell twice to try and clarify this basic (or so I thought) question, but I've had two different answers so far. We have a Dell R710, and a Dell R720. Does DRAC come installed by default on either? Dell said it comes build into the motherboard on the R720 but the second time I rang, they said we didn't have it. Can anyone tell me if DRAC comes as standard on the R720? I'm aware we'll need a license as well, I'm just interested in the physical capability on the server. I've never used DRAC before and know next to nothing about it, so apologies if this seems blindingly simple. Thanks

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