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• Graphics and USB devices freezing soon after OS loads

  - by Andrew

  I run Ubuntu/Windows dual boot. Last night I started the upgrade to Ubuntu 12.04, and my computer has not worked since in either Windows or Ubuntu. Here's what I got when I rebooted after the upgrade, and continue to get every time I boot: Gets to GRUB screen OK. Choose Ubuntu - black screen or crazy purple lines. At first I assumed something went wrong with the upgrade (often happens). Choose Windows - works fine, I log in, but soon after that the graphics freeze (sometimes with purple artifacts). The keyboard and mouse (both USB) also lose power at the same instant, and none of the USB ports have power to them. This happens sooner or later every time I boot. Update: the HDD also appears to lose power at the same point. I have tried a live CD, but my computer refuses to boot any CD even after disabling all other boot options in the BIOS. I have disconnected everything except keyboard, mouse, graphics card with one monitor, one RAM sick and HDD; no change. I also took the little battery out to reset CMOS. I am pretty sure no matter how wrong the Ubuntu upgrade went, it wouldn't cause the above symptoms in Windows. So the only explanation I can think of is that a hardware failure occurred at the same time. Some possible causes of this I can think of are: A couple of days before this, I added a third screen (which worked fine). About a week before, my house lost power in a storm (no ill effects over the past few days though). What can I do, other than buy a new motherboard/CPU and hope it works? Unfortunately I don't have another box to swap parts into to test at the moment.

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• Is "DSLAM congestion" a legitimate reason for slow DSL?

  - by Jay Bazuzi

  My DSL has been extremely slow in the evenings recently. To test it, I telnet to my DSL Modem, and ping the gateway. This way I eliminate internet congestion and local network issues. In the mornings I get 30ms - 50ms pings. In the evenings, it bounces around a lot, but 10000ms pings are common. I complained to Qwest support, and they said it was a known issue on their end, their engineers were working on it, and wouldn't say anything else. A couple days later I complained again, and they sent out a technician. He tested my house wiring and found that one of them had a short. It was an unused line, so we disconnected it, and he said things looked better and left. My daytime speeds improved at this point, but evening is still bad. I complained to Qwest support again, and they said it was a problem with DSLAM congestion at their end, and that they were working on it, but no ETA. My neighbor has Qwest DSL and doesn't seem to have these problems. That seems strange. I go use her network when I absolutely must get online and mine is behaving badly. I can't tell if they're yanking my chain or not. Regardless, these speeds are crap. I'm paying for 7Mpbs but am lucky if I get 1/10th that in the evenings. My kids like to watch Netflix streaming movies, and it's just impossible after 5pm or so. Should I wait it out? Will complaining again produce any results? Should I change my subscription to a lower speed until they fix their end? Or switch to cable?

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• Google Chrome not loading web pages correctly unless multiple refreshes

  - by Brandon Wilson

  Webpages in Google Chrome do not load correctly from time to time. I can't reproduce it, it just happens. Some times it happens when I load the browser other times it happens when I am just browsing. Just now I went to five different web sites which 3 out of 5 of them did not load correctly. I have attached a photo of how Super User loaded the first time I loaded it. If I refreshed it it will load correctly. Facebook is bad like this. Some times Facebook will load correctly but some of there back end scripting may not load so the page may not refresh automatically. Not sure what is going on. I have tried other browsers (Firefox and Internet Explorer) and they seem to be working correctly. Chrome seems to be acting up only on this computer. All my computers are running Windows 8 and I have removed Chrome completely off this computer and re-installed. I even disabled all extensions and cleared all the caches. I even tried running Chrome without being logged in. Not sure what else to do at this point. An example of superuser.com not loading correctly: When I refresh the problem will go away until it happens again. Sometimes it takes two or three refreshes in order for it to correctly load.

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• "The directory name is invalid" when trying to install drivers in Windows 7 via Device Manager

  - by Luke

  First off, this computer is not mine, it's a customer's system. Having said that... The hard drive was moved to a new motherboard, CPU, RAM combo, and booted up fine. Customer puts in driver CD, drivers won't load. He brings it into me. Under Device Manager for Windows 7 x64, I see lots of PCI to PCI bridge, one SMBus Controller, and about 20 Unknown Devices. Greeeeeat... So I start with the SMBus driver directly from the Asus website for the motherboard (P8H77-M Pro). If I install from the setup program, it tells me to reboot, then it starts the install. It gets half way through the setup, then fails (An unknown error occurred. Setup will exit). When I try to point to the folder from Device Manager, it starts copying files for the driver, even presents me with the proper name of the device, but says that an error has occurred there as well: The directory name is invalid. Doing some Googling, I saw that many people had this issue with Vista. K, Vista and 7 are similar, maybe the solutions are the same... But they aren't. I tried: Copying the entire driver folder and setup utility to the Program Files folder and running it / selecting it in DM Downloading another set of drivers in case this one is corrupt Disabling UAC Deleting and recreating the %WINDIR%\TEMP folder Removing all references to previous hardware that I could find, even in Device Manager's hidden mode So far, nothing has worked. A wipe and reload will be out of the question

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• Issues with duplicating TFS 2005 to a virtual server

  - by Hitchhiker

  We have a problem with our current TFS installation. For some reason, which I won't get into, the Sharepoint DBs (sts_content, sts_config) were upgraded to WSS 3 (MOSS). So now, none of our team-project sites work, we have no access to our documents and can't create new team projects. We can still work with the version control, though. We wanted to "play" with the server and try to fix it, without affecting the users. So we used p2v for VmWare, to duplicate the server to a virtual one. We now continued and changed all of the relevant configuration to point to the new server, as explained in the MSDN article. The step of rebuilding the warehouse (with setupwarehouse) failed. Also, we can't access the VersionControl web service (ourserver:8080/VersionControl/v1.0/repository.asmx). We are seeing errors in the EventLog: TF53002: Unable to obtain registration data for application Build. TF53005: Unable to retrieve the Team Foundation Server installed UI culture. TF53002: Unable to obtain registration data for application VersionControl. TF30040: The database is not correctly configured. Contact your Team Foundation Server administrator. The solutions suggested in this blog post did not assist. So now we're kind of stuck. Any assistance will be appreciated.

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• Help Email Account Management among multiple users

  - by CogitoErgoSum

  So I preface this with saying this may belong in IT Security, not too sure feel free to move. Currently we have an email account [email protected] - hosted via google apps (as is all our email). We had an incident where we had to terminate an employee. This employee however had the password for this account as we have 20-30 people utilizing it at any given point to manage customer emails etc. Thinking on this I feel there must be a better way to manage access. With Google you can associate upto 10 email accounts to another the problem is we have more like 20-30 people going. We were evaluating tools such as SalesForce and Assistly where people have their own login credentials and then the system contains the appropriate smtp information for the [email protected] email address to send emails from it rather than a users personal account. Aside from those options does anyone have any other thoughts? One suggestion floated was moving everyone to desktop clients and saving the PW info there so they could only login from their physical workstation but we may have situations where we'd like employees to work remotely. Does anyone have experience with this sort of system where ~20-30 people are responding from one email box and how to manage security and access?

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• Is it possible to setup an internal test email server to keep all mail sent to it?

  - by MattGrommes

  We have a need at my work to setup a test email server that will take all mail sent to it for delivery and instead just dump it into an account for later retrieval. I've been out of the email server configuration game long enough that I think that's possible but I don't know for sure. As a more specific example of what we need: We have code that sends emails to outside clients in certain cases. We want to point our code to a test server that will accept those emails, but not let them get to the outside world (yes, it's happened before, oops). We then need to be able to verify that Email X would have gotten sent to Client Y if we had sent to the real server. As a bonus, we have a error email alias on our real server that goes to the programmers that we would like to keep getting email from. So anything sent to that alias on the test server would forward to our real server for delivery. My preference is for postfix but our IT staff seems set on using sendmail (or Exchange) for everything so hints/pointers for either server would be helpful. Thanks a lot.

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• Mainboard shuts itself off after half a second or so

  - by heishe

  Here's the problem: When I start the PC, the mainboard powers up, then stays that way maybe 0.2-0.5 seconds, and then shuts off again. I say mainboard, and not PC, because I removed all the parts from the system and disconnected everything but the mainboard power supply (the broad 12 pin thingy). When I have the other parts (cpu, graphics card, ram, etc.) installed and connected, the basic behaviour stays the same, but now the mainboard runs for about 6 or 7 seconds (this is a guess) before shutting off. This all started when my monitor wouldn't receive a video signal today, without giving POSTs, so I took the graphics card and the RAM out to see if it changes anything. It didn't, except that from that point on the mainboard would start to have this behavior where it just stays on for a very short time and then shuts off again. I already tested it with a backup PSU - same behavior. What could this be? I'm thinking it can't be on a physical level (transistors burned through or something like that), since then the mainboard either shouldn't start at all or it should detect hardware failures in non-essential parts of the syste and start beeping. Sorry, I forgot to mention. It's an MSI P67A-C43. I already checked the capacitors if someone popped, but I can't find anything. I also tried resetting the cmos, but that didn't change anything.

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• SQL Server Analysis Services, DNS, AD, Kerberos, Connection Issues

  - by ScaleOvenStove

  Running into a very weird issue. Converting servers to Windows 2008/SQL 2008. Have a server, SERVER_A, brand new, setup with Win2k8,Sql2k8 - works. Have a Server SERVER_B, running Windows2003/SQL2005. I want to migrate from SERVER_B to SERVER_A. I have all db's, cubes, etc setup on SERVER_A and it is mimicking functionality. Since users are using Excel to connect to SSAS, they connection string has SERVER_B in it. What I want to do, is, change DNS on the network to point SERVER_B (by name) at the ip of SERVER_A. I have successfully done this with another server, SERVER_C, but I need to do it with SERVER_B. What I have found is that with SERVER_C, after changing DNS, had to remove SERVER_C from AD and then it worked. I could connect to SERVER_C (DB), SERVER_C (SSAS Default Instance) and SERVER_C (SSAS Named instance) and it all was actually connecting to SERVER_A I tried to do the same with with SERVER_B, and no luck. Changed DNS, removed from AD, and it wouldn't connect. Found out that there were some SPN's in AD set up, so removed those and tried again. I then could connect to SERVER_B (DB), SERVER_B (SSAS Named Instance), but not SERVER_B (SSAS Default Instance). I could connect to SERVER_B (SSAS Default Intance WITH the Port #), but I need to be able to connect without the port number. I am at a loss to as why I can't connect to the default instance without a port #. Not sure if it is SPN's in AD, or another AD issue, or something else. Pretty sure it isnt something on the server (because SERVER_C works!) Any insight or suggestions would be greatly helpful!!

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• How to change controller numbering/enumeration in Solaris 10?

  - by Jim

  After moving a Solaris 10 server to a new machine, the rpool disk is now c1t0d0. We have some third party applications hard coded for c0t0d0. How can I change the controller enumeration on this machine? There is no longer a c0. I've tried rebuilding the /etc/path_to_inst, but the instance numbers don't seem to match up with the controller numbers. Also, it's not clear if i86pc platforms use this file. I've tried devfsadm -C to clear the dangling links, but I'm not sure how to cause devfsadm to start numbering from 0 again (or force certain devices in the tree to a specific controller number). Next I am going to try to create the symlinks manually in /dev/dsk and rdsk to point to the correct /devices. I feel like I am going way off path here. Any suggestions? Thanks Update: This is on virtual ESXi hardware with an additional pass-through HBA. There is no controller 0 on the machine, that is for sure. devfsadm -C cleans up all the c0 device symlinks but keeps the already linked controllers at their current ids.

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• Will having 2 MX records pointing to different mail server types cause delivery issues?

  - by Lyken

  I've inherited a setup where the mail server is exchange 2010. For some reason, I'm not sure why there is 2 MX records setup. One being the exchange server which is the higher priority while the external (non-exchange) server is the secondary mx record. I don't believe this was done for redundancy reasons as the other mail server is not set to route mail back to the exchange server (it's just the webhosts email for their hosting) The client has been experiencing disappearing email, however after my investigations its not actually disappearing, but exchange is successfully receiving the mail and then passing it on to the external server. It isn't happening all the time, just with some email messages from some domains. My question: Is exchange passing the mail on because it can see the secondary MX record and is configured (somewhere) to send mail out? If so, how do I stop it? Is it as easy as just removing the second MX record pointing to the external mail server and exchange will stop passing mail on? I'm not exchange expert so I'm kinda stumped. Exchange MX tools are saying everything is setup and configured correctly from an external point of view.

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• Vyatta masquerade out bridge interface

  - by miquella

  We have set up a Vyatta Core 6.1 gateway on our network with three interfaces: eth0 - 1.1.1.1 - public gateway/router IP (to public upstream router) eth1 - 2.2.2.1/24 - public subnet (connected to a second firewall 2.2.2.2) eth2 - 10.10.0.1/24 - private subnet Our ISP provided the 1.1.1.1 address for us to use as our gateway. The 2.2.2.1 address is so the other firewall (2.2.2.2) can communicate to this gateway which then routes the traffic out through the eth0 interface. Here is our current configuration: interfaces { bridge br100 { address 2.2.2.1/24 } ethernet eth0 { address 1.1.1.1/30 vif 100 { bridge-group { bridge br100 } } } ethernet eth1 { bridge-group { bridge br100 } } ethernet eth2 { address 10.10.0.1/24 } loopback lo { } } service { nat { rule 100 { outbound-interface eth0 source { address 10.10.0.1/24 } type masquerade } } } With this configuration, it routes everything, but the source address after masquerading is 1.1.1.1, which is correct, because that's the interface it's bound to. But because of some of our requirements here, we need it to source from the 2.2.2.1 address instead (what's the point of paying for a class C public subnet if the only address we can send from is our gateway!?). I've tried binding to br100 instead of eth0, but it doesn't seem to route anything if I do that. I imagine I'm just missing something simple. Any thoughts?

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• DNS Resolution doesn't work after uninstalling Cisco VPN & Deterministic Network Enhancer in Win 7

  - by Craig M

  I just upgraded my home PC to Windows 7 Ultimate 32 bit. After trying various methods to get the Cisco VPN client to work, I gave up and decided to just run it in XP mode. The last steps I tried were in this article ( http://social.technet.microsoft.com/Forums/en-US/w7itproappcompat/thread/d880dfe5-7f44-4955-8620-2a9355d8ea8b/ ) After that, I uninstalled the Cisco client and rebooted. I uninstalled the Deterministic Network Enhancer and rebooted again. Both uninstalled successfully, but now I'm not able to resolve any DNS. The only way I can resolve DNS is to reinstall the DNE, reboot, and uninstall the DNE. Then I am able to resolve DNS lookups until I reboot again. Once it's rebooted, no more DNS. Any ideas? Edit: I completely forgot I'd asked this question until harrymc posted his answer. I've since found out that to fix this problem, I need to disable my Local Area Connection and re-enable it. Once I do that I have no trouble making network connections until the next time I reboot at which point I repeat the process. It's annoying, but manageable since I reboot very infrequently.

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• How do I install a different OS on a Compaq Presario cq56 with preinstalled SuSE 11?

  - by McCoy

  Thing is, I don't have a clue of Linux systems, I usually use WinXP. Bought a notebook with SuSE 11 on it, because I have my XP licence and thought I could install that if I found the chipset drivers for the hardware (which I'm not completely sure I have the right versions of). Then I thought I'd give it a shot with the SuSE, looked nice enough. But I can't get my external hd to work (tried force mount) and the banshee doesn't do anything like playing video. Since that is one of the two main purposes of this notebook, I need to get that to work. Tried downloading VLC player, but that only works with SuSE 11.1 upwards. So I downloaded a SuSE 11.3 and burned the iso. But surprise, no way the notebook would boot from cd. Same with the XP cd (considered setting up a dual boot). And no, I can't get to BIOS to reset to default, either. So I can basically do nothing else than going online with this thing and that's not enough for me (gamer in withdrawal, yikes!). I need at least to get to my firefox profile on the external hd and be able to watch video. Can somebody please help me? I think at this point I'd prefer to install XP and MAYBE the SuSE 11.3 after that. I'm not a native speaker, so please speak plainly, thanks. :) Edit: if this is impossible, could someone please help me with the external hd mount and video playback? Edit: Found out how to boot from cd by now. But still no XP, because I get bluescreen after bluescreen while setup is loading files. I guess it's the missing SATA drivers...

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• BGP Multipath & return routes

  - by Dennis van der Stelt

  I'm probably a complete n00b concerning serverfault related questions, but our IT department makes a bold statement I wish to verify. I've searched the internet, but can find nothing related to my question, so I come here. We have Threat Management Gateway 2010 and we used to just route the request to IIS and it contained the ip address so we could see where it was coming from. But now they turned on "Requests apear to come the TMG server" so ip addresses aren't forwarded anymore. Every request has the ip of the TMG server. Now the idea behind this is that because of multipath bgp routes, the incoming request goes over RouteA, but the acknowledgement messages could return over RouteB. The claim is that because the request doesn't come from the first known source, our proxy, but instead from IIS, some smart routers at the visitor of our websites don't recognize the acknowledgement message and filter it out. In other words, the response never arrives. Again, this is the claim. But I cannot find ANY resources on the internet that support this claim. I do read about bgp multipath, but more in the case that there are alternative routes when the fastest route fails for some reason. So is the claim completely bogus or is there (some) truth to it? Can someone explain or point me to resources? Thanks in advance!

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• Java Deployment Ruleset not working

  - by adbertram

  I've created a Java Deployment Ruleset that looks like this: <ruleset version="1.0+"> <rule> <id location="http://hpfweb.mydomain.com/" /> <action permission="run" version="1.6.0_20" /> </rule> <rule> <id location="http://*.mydomain.com" /> <action permission="run" /> </rule> <rule> </ruleset> I've created a self-signed cert, added it into the keystore as well as Trusted Certification Authorities. I have an app at http://hpfweb.mydomain.com that requires Java v1.6.20 and will error out if any other version is attempted. When only this version is installed on the computer the application works. However, if a newer version is installed, it does not. As you can see, I've attempted to force the version to 1.6.0_20 in the ruleset. I've confirmed the deployment rule set is being applied successfully by going into the Java Control Panel -- Security and "view the active deployment rule set". It is exactly as you see here. I've also looked at the web source for the application and all references point to http://hpfweb* links. When the applet is launched I've brought up task manager and have confirmed the java.exe launched is coming from the jre6 directory. When the newer version is installed, I'm getting the error "accesscontrolexception - access denied (java.awt.AWTPermission.accessEventQueue".

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• Configuring port forwarding for SSH - no response outside LAN [migrated]

  - by WinnieNicklaus

  I recently moved, and at the same time purchased a new router (Linksys E1200). Prior to the move, I had my old router set up to forward a port for SSH to servers on my LAN, and I was using DynDNS to manage the external IP address. Everything worked great. I moved and set up the new router (unfortunately, the old one is busted so I can't try things out with it), updated the DynDNS address, and attempted to restore my port forwarding settings. No joy. SSH connections time out, and pings go unanswered. But here's the weird part (i.e., key to the whole thing?): I can ping and SSH just fine from within this LAN. I'm not talking about the local 192.168.1.* addresses. I can actually SSH from a computer on my LAN to the DynDNS external address. It's only when the client is outside the LAN that connections are dropped. This surely suggests a particular point of failure, but I don't know enough to figure out what it is. I can't figure out why it would make a difference where the connections originate, unless there's a filter for "trusted" IP addresses, which is perhaps just restricted to my own. No settings have been touched on the servers, and I can't find any settings suggesting this on the router admin interface. I disabled the router's SPI firewall and "Filter anonymous traffic" setting to no avail. Has anyone heard of this behavior, and what can I do to get past it?

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• Domain registrar transfering

  - by Mike Weerasinghe

  In 2004 I registered a domain name when I opened an account with DiscountASP.NET. I presume my domain registration was handled by a reseller. A domain tools who is search shows that registration services are provided by Znode LLC. I changed hosting companies and need to change DNS servers to point to my new hosting company but I have no idea how to do that. There is no control panel I can access. Ideally I would like to transfer registrar's. I emailed Znode support but I have not received any response. I called and left a message and they have not called back. My new hosting company wants an EPP authorization code in order to transfer my domain. I guess I need to get it from Znode LLC. Anyone have any ideas on how I might go about transferring my domain over to a new registrar? The domain name has not expired and is currently active. Thanks in advance for your help.

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• Email test deferred (mail transport unavailable) with ClamAV

  - by dirt

  I'm trying to set up a simple new mail server; when I send a test email to the server the email is getting hung up during delivery (user mapping is found) and the email is never found in /home/user/Maildir/new Here is my maillog after a fresh reboot and test email, there are a few warnings I am unfamiliar with. Can you please point me in the right direction? Oct 25 14:54:57 loki dovecot: master: Dovecot v2.0.9 starting up (core dumps disabled) Oct 25 14:54:58 loki postfix/postfix-script[1369]: starting the Postfix mail system Oct 25 14:54:58 loki postfix/master[1370]: daemon started -- version 2.6.6, configuration /etc/postfix Oct 25 14:56:00 loki postfix/tlsmgr[1457]: warning: request to update table btree:/etc/postfix/smtpd_scache in non-postfix directory /etc/postfix Oct 25 14:56:00 loki postfix/tlsmgr[1457]: warning: redirecting the request to postfix-owned data_directory /var/lib/postfix Oct 25 14:56:00 loki postfix/smtpd[1455]: connect from mail-ob0-f180.google.com[209.85.214.180] Oct 25 14:56:01 loki postfix/smtpd[1455]: 1CF5E20A8B: client=mail-ob0-f180.google.com[209.85.214.180] Oct 25 14:56:01 loki postfix/cleanup[1461]: 1CF5E20A8B: message-id= Oct 25 14:56:01 loki postfix/qmgr[1379]: 1CF5E20A8B: from=, size=1788, nrcpt=1 (queue active) Oct 25 14:56:01 loki postfix/qmgr[1379]: warning: connect to transport private/scan: No such file or directory Oct 25 14:56:01 loki postfix/error[1462]: 1CF5E20A8B: to=, orig_to=, relay=none, delay=0.18, delays=0.15/0.02/0/0.01, dsn=4.3.0, status=deferred (mail transport unavailable) Oct 25 14:56:01 loki postfix/smtpd[1455]: disconnect from mail-ob0-f180.google.com[209.85.214.180] master.cf snippets: # ========================================================================== # service type private unpriv chroot wakeup maxproc command + args # (yes) (yes) (yes) (never) (100) # ========================================================================== smtp inet n - n - - smtpd submission inet n - n - - smtpd -o smtpd_tls_security_level=encrypt # -o smtpd_sasl_auth_enable=yes # -o smtpd_client_restrictions=permit_sasl_authenticated,reject # -o milter_macro_daemon_name=ORIGINATING smtps inet n - n - - smtpd -o smtpd_tls_wrappermode=yes # -o smtpd_sasl_auth_enable=yes # -o smtpd_client_restrictions=permit_sasl_authenticated,reject # -o milter_macro_daemon_name=ORIGINATING scan unix - - n - 16 smtp -o smtp_data_done_timeout=1200 -o smtp_send_xforward_command=yes -o disable_dns_lookups=yes 127.0.0.1:10026 inet n - n - 16 smtpd -o content_filter= -o local_recipient_maps= -o relay_recipient_maps= -o smtpd_restriction_classes= -o smtpd_client_restrictions= -o smtpd_helo_restrictions= -o smtpd_sender_restrictions= -o smtpd_recipient_restrictions=permit_mynetworks,reject -o mynetworks_style=host -o smtpd_authorized_xforward_hosts=127.0.0.0/8

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• corrupted, hidden, wireless network adapter from "Network Connections" in Windows 7

  - by srihari reddy

  The issue is that when I install a wireless network adapter on my Windows 7 Professional machine I have no connectivity, the system tray icon has a red X. First, I tried the obvious, install updated drivers from the manufacturer. When I did this, the Network Connections icon had gray bars and there was no connectivity. So I tried installling the network adapter on a different computer on the same network and I verified that it does work with no issues. Next, I ran scan disk with no issues. Next, I ran sfc as admin with no issues. At this point I turned to the router and turned SSID broadcast on but that didn't help. I turned MAC address filtering off at the router but that didn't help. Whenever I installed the original network adapter (a wireless N usb adapter with WPA2 TKIP+AES) it showed up as "Wireless Network Connection 2" with a grayed out icon and no connectivity. Lastly, I tried installing two different "verified working" usb wireless adapters on to the Windows 7 Pro machine. The results were the same "Wireless Network Connection 2" that had a green bar icon but no connectivity. I installed the manufacturers software and it indicated the NIC was not there even thought the driver installed successfully in Device Manager. I guess I should mention, I first tried (insanely in vain) to use the (worthless) Windows Network troubleshooter. The results were....drumroll please... There is a problem with the network adapter... well No Duh! Also, during all of this the network adapter is always showing as "Working Properly" in the properties dialogue of Device Manager for the wireless NIC. I checked for hidden devices in Device Manager but there were none. Here is my fundamental question that I've tried to find in the Windows 7 support center with no luck. How do I remove/delete/uninstall network adapters from the Windows 7 registry? in particular hidden, corrupted network adapters, that used to be working.

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• Need troubleshooting advice for intermittent dns problems with requests on isp nameservers

  - by Mnebuerquo

  I've been having some intermittent dns problems with a web server, where certain isp's dns servers don't have my hostnames in cache and fail to look them up. At the same time, queries to opendns for those hostnames resolve correctly. It's intermittent, and it always works fine for me, so it's hard to identify the problem when someone reports connectivity problems to my site. My website is on a server running linux with Plesk. My dns records are configured with plesk (so my server is its own dns master). Domain name is registered with godaddy. I'm not real knowledgeable about dns, so I don't really know how to begin with troubleshooting. I've started learning to use dig, but while I can read the manpage to learn the syntax, I don't really know what questions to ask. Since the problem is intermittent I haven't been able to really catalog many symptoms. Symptoms I have observed: Certain people repeatedly reported intermittent problems connecting to my website. This was only from certain networks. (Ex: One guy could connect reliably from his office but not his home.) Sometimes I notice my browser taking a long time looking up the hostname for my site (Firefox shows a message in the status bar at the bottom). For me this is in the ten second range. ssh connections from anywhere to my server take a long time to connect but then seem to work fine once connected. So hopefully the folks on serverfault can point me to a good beginner tutorial for understanding dns, and suggest troubleshooting questions to ask next time one of my users reports connectivity problems.

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• Cannot login to zabbix web portal

  - by hlx98007

  I've managed to install Zabbix22-server on CentOS 6.x along with php-fpm and nginx. I can view the page of 127.0.0.1 but I can only see this: After clicking the "Login" button, the page is the same: What can I do to make it work as expected, so that I can login as admin? Here are some confs: nginx_zabbix.conf: server { listen 80; add_header X-Frame-Options "SAMEORIGIN"; access_log /var/log/nginx/zabbix.log; error_log /var/log/nginx/zabbix.err.log; client_max_body_size 500M; # This folder is a soft link to /usr/share/zabbix # the permssion has been set to nginx:nginx recursively. root /var/www/zabbix; location / { index index.html index.htm index.php; } location ~ \.php$ { fastcgi_pass 127.0.0.1:9000; fastcgi_index index.php; include fastcgi.conf; fastcgi_param PATH_INFO $path_info; } } php-fpm is using its default values, with permission user/group set to nginx (rather than apache) Folder /var/lib/php/session has been set to nginx:nginx with permission 770. SELinux is set to disabled. I've restarted everything up to this point.

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• Split Tunnel VPN using incorrect Tunnel

  - by Brian Schmeltz

  Our company has a handful of field offices that have recently been setup with a regular internet connection after we removed the T1 and router that connected them directly to our network. Now, when the users are in the office, they log in to the VPN to be able to connect to the network. For the sake of them being able to print and scan from the local multi-function we have setup a split tunnel VPN. We currently have about 15-20 users using this setup around the country without any problems. Recently one of our users started having problems accessing internal programs/sites when connecting from both home and the office. There are three other users in the same office and they do not have this problem. I assumed that it was something with the computer and went ahead and replaced it with another of the same model. The computer worked fine in our home office; however, when the user received it, she had the exact same problem both at home and in the field office. Thinking it may be a NIC driver issue I sent her another computer, this time a different model, same problem occurred. If I update the host file to point to the correct paths, things will work, and if I connect via a normal VPN connection everything works, but the user cannot scan or print - which is a problem. Have tried to find ways to create another tunnel on a normal VPN and have tried to find ways to force the correct tunnel on the split tunnel VPN. It appears that there is something related to the ISP because if I connect to Comcast or Verizon it is fine but once she connects to Insite then she has problems. I have been unable to get any support from Insite as they don't feel the issue is with them. We use a Nortel VPN client. Any thoughts or ideas would be appreciated.

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• Simple end-to-end load and bottleneck monitoring for DB-based web sites

  - by T.J. Crowder

  What tools do you use / would you recommend for monitoring a Linux-based, DB-based website's servers for bottlenecks and load? The obvious goal being to know when growth has gotten to the point where it's necessary to scale up (or out) one or more of the bits and pieces because the current system won't be managing the load if an observed trend continues. I'm looking for general recommendations based on standard Linux load metrics, disk I/O metrics, network I/O metrics, etc., but if specifics are helpful: It'll be Tomcat6 using APR (possibly with a Varnish or similar caching and balancing front-end), MySQL, and either Ubuntu 8.04 LTS or 10.04 LTS depending on timing. I know about top, vmstat, iostat, bwmon and the like that collect and parse info from the /proc file system (et. al.); and obviously MySQL provides a lot of queriable performance information. I could use those directly, probably automating periodic monitoring logs with scripts and such. But I have a suspicion that I'd be reinventing a wheel... For example, Hyperic HQ seems to be along the lines of what I'm looking for. Others? Meta: I tend to think of "recommendation" questions as needing to be CW because there's no one right answer, but I see a lot of these here that aren't CWs, so I haven't marked it as one. I'll happily do so if enough people think I should.

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• 500 error with deploying rails application via apache2+passenger

  - by user1633983

  I finally completed my own app, so the only work left is deploying the app. I'm using Ubuntu 10.04 and apache2(installed by apt-get), so I'm trying to deploy through passenger. I installed passenger gem like this: sudo gem install passenger rvmsudo passenger-install-apache2-module and I configured apache settings as what the installation message says. I added below lines in the middle of /etc/apache2/apache2.conf file. LoadModule passenger_module /home/admin/.rvm/gems/ruby-1.9.3-p194/gems/passenger-3.0.17/ext/apache2/mod_passenger.so PassengerRoot /home/admin/.rvm/gems/ruby-1.9.3-p194/gems/passenger-3.0.17 PassengerRuby /home/admin/.rvm/wrappers/ruby-1.9.3-p194/ruby and, I appended below lines in /etc/apache2/sites-available/default file. <VirtualHost *:80> ServerName localhost # !!! Be sure to point DocumentRoot to 'public'! DocumentRoot /home/admin/homepage/public <Directory /home/admin/homepage/public> # This relaxes Apache security settings. AllowOverride all # MultiViews must be turned off. Options -MultiViews </Directory> But when I restart the apache service and hit the address, 500 error occurs. At first, it was same 500 error but the 500 error page is from apache's, but when I reinstalled the libapache2-module-passenger, the 500 error page is changed to that from rails'. Because of rails' 500 error page(which is located at public/500.html), I think passenger module is properly connected with apache. What should I do to fix this problem? Do I need to configure something inside my app before deployment?

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