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• OpenVPN IPV6 Tunnel Radvd

  - by Arenstar

  Hello.. I have an interesting question regarding ipv6 + openvpn.. My Version is OpenVPN 2.1.1 i have been given a native /64 ipv6 network ( for this example 2001:acb:132:acb::/64 ) The plan was/is, route this block through openvpn and into an office ( for testing purposes ) Soo to explain.. I have a Centos Box as the first linux "router" in a datacenter & a Ubuntu box as the second linux "router" in the office I have created a simple point-to-point tunnel using tun ( based off ipv4 address to start the tunnel ) I have assigned to Centos /sbin/ip addr add fed1::1/128 dev eth0 /sbin/ip addr add fed2::2/128 dev tun0 /sbin/ip route add 2001:acb:132:acb::/64 dev tun0 ## ipv6 Block down the tunnel /sbin/ip route add ::/0 dev eth0 ## Default out to Gateway I have assigned to Ubuntu /sbin/ip addr add fed1::3/128 dev tun0 /sbin/ip addr add fed1::4/128 dev eth0 /sbin/ip route add 2001:acb:132:acb::/64 dev eth0 ## ipv6 Block down to eth0 /sbin/ip route add ::/0 dev tun0 ## Default up the tunnel I have also included on both servers.. sysctl -w net.inet6.ip6.forwarding=1 Looks Good... right??? Wrong.. :( I am not able to ping fed1::1 from fed1::4 (Ubuntu) (can ping :4,:3,:2) However, i can ping fed1::1 fed1::2 from :3 ?????? ( very strange ) I am able to access the internet from any ipv6 interface on the Centos Box but clearly not from the Ubuntu box.. Further, i will eventually run radvd on the Ubuntu box eth0, and autoconf the network with ipv6 address's Anyone with some advice / tips to help me out.. ??? Cheers

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• SSH works in putty but not terminal

  - by Ryan Naddy

  When I try to ssh this in a terminal: ssh [email protected] I get the following error: Connection closed by 69.163.227.82 When I use putty, I am able to connect to the server. Why is this happening, and how can I get this to work in a terminal? ssh -v [email protected] OpenSSH_6.0p1 (CentrifyDC build 5.1.0-472) (CentrifyDC build 5.1.0-472), OpenSSL 0.9.8w 23 Apr 2012 debug1: Reading configuration data /etc/centrifydc/ssh/ssh_config debug1: /etc/centrifydc/ssh/ssh_config line 52: Applying options for * debug1: Connecting to sub.domain.com [69.163.227.82] port 22. debug1: Connection established. debug1: identity file /home/ryannaddy/.ssh/id_rsa type -1 debug1: identity file /home/ryannaddy/.ssh/id_rsa-cert type -1 debug1: identity file /home/ryannaddy/.ssh/id_dsa type -1 debug1: identity file /home/ryannaddy/.ssh/id_dsa-cert type -1 debug1: identity file /home/ryannaddy/.ssh/id_ecdsa type -1 debug1: identity file /home/ryannaddy/.ssh/id_ecdsa-cert type -1 debug1: Remote protocol version 2.0, remote software version OpenSSH_5.1p1 Debian-5 debug1: match: OpenSSH_5.1p1 Debian-5 pat OpenSSH_5* debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_6.0 debug1: Miscellaneous failure Cannot resolve network address for KDC in requested realm debug1: Miscellaneous failure Cannot resolve network address for KDC in requested realm debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug1: kex: server->client aes128-ctr hmac-md5 none debug1: kex: client->server aes128-ctr hmac-md5 none debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP Connection closed by 69.163.227.82

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• Using WDS to make a router act like a makeshift signal booster

  - by cornjuliox

  I've got a router that supports WDS, and I was wondering if I could use it to help extend the range of an existing wireless router? The PC I'm using right now is just barely within the signal range of a wireless router, and the signal is rather weak so I moved my wireless USB adapter away from the computer using a USB extension cord and used a pie tin + some packing tape + a stack of books and a tall wooden stand to make a sort of reflector dish. Sometime in the future I'd like other PCs to be able to connect wirelessly but with the way things are set up I can't move any farther from this spot or I lose the signal entirely. Can I use WDS to bridge the two networks together both to increase the range of the first network and allow computers connected to the 2nd router to share internet access?

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• Office 2010 Trusted Locations not working after restart

  - by Josh King

  In Excel 2010, on Windows XP, I am unable to open files - through the open dialog box - from a network drive. The sever has already been added to the Trusted Locations and now most security settings turned down or off. Excel will show "Downloading ..." on that status bar and a progress bar which doesn't progress. We have left Excel sitting in this state for 30+ minutes and no change. A similar problem occurs when saving files to network shares. If we use explorer to navigate to the files and double click them they open flawlessly. No add-ins are active. We also have this problem in Word 2010, but the server was not initially in the Trusted Locations. I added it and it worked until the PC was reset, it now exhibits the same issues as Excel where the server is in the Trusted locations but will not open files. I have tried removing the server from the Trusted Location in both applications, restarting the PC and re-adding them (testing before, after and in-between) and had no luck.

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• Laptop burned after heavy OpenGL usage. Is there hope?

  - by leladax

  After programming for OpenGL and a 'slow OS' case for a couple of minutes the screen went blank. I shut it down with forcing it with the shutdown key and now there's no led at all with battery or AC, it doesn't start at all, it's totally dead. It's most certainly not the AC adapter since that didn't show at first, it doesn't start a led at all and if the AC is connected it does a very slight and faint clicking noise (one has to have his ear next to it to hear it, near the AC connector). Is there any hope? I suppose it's a burned motherboard. I suspected a burned GPU but that would still leave the leds at least lid or at least attempting to start up. Now it's totally dead. It's a TOSHIBA satellite x200-219. It has no warranty, as it's more than 2 years since purchase.

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• Hyper-V and custom resolution

  - by Thomas Levesque

  I know this question has been asked many times (here and on TechNet), and the answer is usually "use RDP". But apparently, RDP is now the only option, and it's what I'm using. My screen is an LCD TV with a resolution of 1360x768. Unfortunately, this resolution is apparently not supported; the closest I can get in a Windows 8 VM is 1366x768, and it adds scrollbars, which make it difficult to put the mouse in the corners to get at the start screen and charm bar... Smaller resolutions don't fill the screen, so it's also difficult to put the mouse in the corner. Is there a way to set a custom resolution to fit my screen exactly ? (note: I know it's not a Windows 8 problem, since I don't have this problem on my host machine which also runs Windows 8. I assume it's related to the display adapter used by Hyper-V, but there don't seem to be any options to change it)

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• Intermittent NFS lockups on Isilon cluster

  - by blackbox222

  We have an Isilon cluster with 8 IQ 12000x nodes which exports storage via several NFS shares for a handful of Linux and Solaris clients. There is a Linux system that has one of these NFS filesystems mounted. I/O to this filesystem is moderately heavy from the Linux system. Every 3-4 weeks (it's not on any kind of discernible schedule, and sometimes is more/less frequent than this), we notice that all activity ceases on this NFS mount (the process hangs, as if the network stopped working so process is stuck in uninterruptible sleep) - 30 minutes later, the share recovers and things continue to work normally. The kernel log from the affected machine is as follows: Dec 3 10:07:29 redacted kernel: [8710020.871993] nfs: server nfs-redacted not responding, still trying Dec 3 10:37:17 redacted kernel: [8711805.966130] nfs: server nfs-redacted OK relevant /etc/fstab line: nfs-redacted:/ifs/nfs/export_data/shared/...redacted... /data nfs defaults 0 0 I've checked to see if there are any scheduled processes e.g. cron jobs, Isilon related functions e.g. snapshots, etc that might be causing these hangups but I can't seem to find anything. I'm also not aware of any network related issues or maintenance that would cause this. All of the lockups last almost exactly 30 minutes per the kernel logs. Perhaps someone has some suggestions I could try? (I considered a soft mount to avoid the problems associated with processes accessing the filesystem hanging; however am wary of the corruption that could result and it would not really solve the underlying issue anyway).

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• 2 servers on 2 networks in same office

  - by irot

  Hello Gents, My office doesn't have a "server guy" in employ, so I'm stuck with having to fix server issues for now. There are 2 servers in our office, both are file/web servers only accessible via LAN. They are currently on the same network, so no issue there. Problem is, we recently got a static IP to use, but it's with a different ISP, so now we have 2 routers in our office. I would like to open one of the servers to the public as a web/FTP server. But if I hook a server up to the new router, users will no longer be able to access the files shared on that server (because they're on different networks). How can I go about making one server accessible to the public using the static IP line, but still able to share the files on it to the users connected to the other network? The server I want to make public is running Windows Server 2008, the other server Windows Server 2003. And as far as I know, IP addresses are assigned by the router. I'm just a developer, don't know much about networking. Thank you in advance.

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• Connecting remotely to an SQL server inside a LAN

  - by vondip

  Hello everyone, I am using SQL server 2008 inside my home lan. I've configured it to accept remote connections and I can now connect to the server from other pcs inside the lan. The problems rises when I try connecting to the server from a computer outside of my home lan. I've disabled my router's firewall and I've configured a virtual server on port 1433 forwarding to the correct lan ip. What's wrong? why is it not working? Thank you very much for your help~! Edit: This is the error I keep getting: A network related or instance specific error occured while establishing connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that the SQL SERVER is configued to allow remote connections. (provider : Sql network interfaces, error: 25- Connection string is not valid) OK these are my router's details: edimax br-6204wg I am not sure how I am supposed to browse google.com. can you be a bit more specific?

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• When would a persistent route not be an active route?

  - by alnorth29

  I've added a persistent route to our Windows Server 2003 box using "route -p add". After a reboot the "route print" gave this: Active Routes: Network Destination Netmask Gateway Interface Metric 0.0.0.0 0.0.0.0 10.91.131.1 10.91.131.9 20 10.88.0.0 255.255.255.252 10.88.0.1 10.88.0.1 30 10.88.0.1 255.255.255.255 127.0.0.1 127.0.0.1 30 10.91.131.0 255.255.255.0 10.91.131.9 10.91.131.9 20 10.91.131.9 255.255.255.255 127.0.0.1 127.0.0.1 20 10.255.255.255 255.255.255.255 10.88.0.1 10.88.0.1 30 10.255.255.255 255.255.255.255 10.91.131.9 10.91.131.9 20 127.0.0.0 255.0.0.0 127.0.0.1 127.0.0.1 1 224.0.0.0 240.0.0.0 10.88.0.1 10.88.0.1 30 224.0.0.0 240.0.0.0 10.91.131.9 10.91.131.9 20 255.255.255.255 255.255.255.255 10.88.0.1 10.88.0.1 1 255.255.255.255 255.255.255.255 10.91.131.9 10.91.131.9 1 Default Gateway: 10.91.131.1 =========================================================================== Persistent Routes: Network Address Netmask Gateway Address Metric 10.88.0.0 255.255.255.0 10.88.0.2 1 The route I added is listed as a persistent route, but not an active one. Why might this be the case? The route in question is for an OpenVPN connection, would that have anything to do with it?

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• Second video card (PCI) under Windows 7

  - by dbkk101

  I'm trying to get an old PCI video card (Diamond Stealth 2500) along with a normal PCI-E video card. In BIOS, there is a setting to switch between PEG/PCI or PCI/PEG on startup (PEG is PCI-E Graphics). When I use PCI/PEG only the old PCI card works, when I use the other one, only the new PEG card works. In PEG/PCI mode, Windows 7 recognizes the card and shows it in Device Manager as Standard VGA adapter, but it shows a warning for the device ("This device cannot start. (Code 10)").

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• RDP or SSH connection trough Windows 2008 server VPN hang after a while

  - by xt4fs

  I have been experiencing a very strange issue with our VPN setup on Windows Server 2008. That server is running as a Xen Virtual Machine. We use it for two purposes, permit our mobile workers to connect to another server hosted somewhere else that only allow that ip, and use it to RDP or ssh to many other virtual machine on the same server. The server has no performance issue and still a load of memory free. All other virtual machine has no problem whatsoever. Many of those virtual machine have public IP (web servers) and all their firewall are set to allow only ssh connection or RDP connection from their local interface. When I am connecting directly with either ssh or RDP to one of the other virtual machine everything run without any issues. However, when I am doing so through the VPN after some time the connection just hang, it usually continue after some time (5 or 10 minutes). It seems as more there is network usage more often it happen to a point where it is completely unusable. The worst thing I can do to hang it faster is to actually ping the vpn client IP from the local network, after some time the latency increase until it hang. This happen even if I do RDP to the local ip of the VPN server trough the VPN. The server report no problem and if I disconnect to the vpn and reconnect right away everything is alright. There is nothing wrong in the VPN server log. I have taught at the beginning that it could have been an issue with the Host server so I try to RDP,ssh directly to the guest and I have experience no issue while doing this, so it really seems to be a problem with the VPN server on Windows server 2008. Another very weird thing is it does not seems to be of any issue if you only do Internet (NAT) without trying to connect to any local ips.

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• Domain workstation acting up and I can't track it down.

  - by DevNULL

  I have a developer with a Windows XP (SP2) 64 bit machine. If the machine is left on overnight (or any period of time longer than 5-6 hours) it takes 2-3 minutes to open any local drive and his network drives are no longer accessible. Here's what the system logs report... Any Help BTW: The problem just started a week ago and nothing has changed on the domain controller / AD or his machine. --- ERROR 1 Event Type: Error Event Source: NETLOGON Event Category: None Event ID: 5719 Date: 6/8/2010 Time: 9:17:26 AM User: N/A Computer: BFC1 Description: This computer was not able to set up a secure session with a domain controller in domain UR due to the following: There are currently no logon servers available to service the logon request. This may lead to authentication problems. Make sure that this computer is connected to the network. If the problem persists, please contact your domain administrator. ADDITIONAL INFO If this computer is a domain controller for the specified domain, it sets up the secure session to the primary domain controller emulator in the specified domain. Otherwise, this computer sets up the secure session to any domain controller in the specified domain. For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp. Data: 0000: 5e 00 00 c0 ^..A --- ERROR 2 The machine-default permission settings do not grant Local Activation permission for the COM Server application with CLSID {555F3418-D99E-4E51-800A-6E89CFD8B1D7} to the user NT AUTHORITY\LOCAL SERVICE SID (S-1-5-19). This security permission can be modified using the Component Services administrative tool. For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp. --- ERROR 3 Event Type: Error Event Source: RemoteAccess Event Category: None Event ID: 20106 Date: 6/8/2010 Time: 10:12:18 AM User: N/A Computer: BFC1 Description: Unable to add the interface {E76F0A78-7A0B-4EBB-A081-BA3BD452FC4C} with the Router Manager for the IP protocol. The following error occurred: Cannot complete this function. For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp. Data: 0000: eb 03 00 00 e...

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• Adding extra fan on my setup. please advice on proper Exhaust or Intake of Fan.

  - by Pennf0lio

  Hi, I modify my Computer case so that I can add more computer fan to make my computer cool this summer. I would need your thoughts how I can improve my idea and I'm open to all of your advices. Status: Fan Position (The blue circles are the fan's location) At the side I have to intake blowing fresh air at the motherboard and at the top and back I have Exhaust fan blowing out hot air. The computer fans will be powered by 12v adapter (recycled) so that my power supply wouldn't be overloaded. I need a practical advice, I don't want to spend to much on this. Thanks.

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• How do I ensure a process is running, even if it kills itself? (it needs to be restarted then)

  - by le_me

  I'm using linux. I want a process (an irc bot) to run every time I start the computer. But I've got a problem: The network is bad and it disconnects often, so I need to manually restart the bot a few times a day. How do I automate that? Additional information: The bot creates a pid file, called bot.pid The bot reconnects itself, but only a few times. The network is too bad, so the bot kills itself sometimes because it gets no response. What I do currently (aka my approach ;) ) I have a cron job executing startbot.rb every 5 minutes. (The script itself is in the same directory as the bot) The script: #!/usr/bin/ruby require 'fileutils' if File.exists?(File.expand_path('tmp/bot.pid')) @pid = File.read(File.expand_path('tmp/bot.pid')).chomp!.to_i begin raise "ouch" if Process.kill(0, @pid) != 1 rescue puts "Removing abandoned pid file" FileUtils.rm(File.expand_path('tmp/bot.pid')) puts "Starting the bot!" Kernel.exec(File.expand_path('./bot.rb')) else puts "Bot up and running!" end else puts "Starting the bot!" Kernel.exec(File.expand_path('./bot.rb')) end What this does: It checks if the pid file exists, if that's true it checks if kill -s 0 BOT_PID == 1 (if the bot's running) and starts the bot if one of the two checks fail/are not true. My approach seems to be quite dirty so how do I do it better?

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• How do I prevent or override a group policy on Windows 7?

  - by Kevin

  A few months ago my company was purchased by a large corporation. We recently switched our network over to the large corporate network which has more restrictions requirements. One of these is the requirement to use a proxy server for Internet traffic. However, some of our internal servers are not recognized by the corporate DNS, so we need to provide the fully qualified domain name. For W7, we make changes to the Internet Properties for IE8 and Chrome to include our domain name as an exception to the proxy server (e.g., *.foobar.com). The problem is that a group policy that does not include our domain name is continually pushed out to my systems throughout the day. This requires me to make the appropriate changes to the Internet Properties several times a day in order to access our internal servers. Is there a way that I can prevent the group policy from being pushed to my systems or detect when the group policy is pushed and override it? I am an administrator on all of my systems. I do have Firefox installed which is not subject to the same group policy push, but I need to have IE8 and Chrome working.

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• Bridging Wireless and Wired Interfaces in Linux

  - by The Daemons Advocate

  My network setup is something like: Wireless Router <---> Netbook <---> Ubuntu Desktop ...or, more verbosely (with interfaces): Wireless Router <--(wireless)--> (eth2) Ubuntu Netbook Ubuntu Netbook (eth0) <---(wired)----> (eth0) Ubuntu Desktop In a perfect world, I'd have the desktop wired, but weird circumstances combined with my wanting to understand more about networking in linux make me want to figure out how to bridge these two devices. A bit of googling has given me this example using bridge-utils, and here's how I'm (failing) to setup the bridge (on the netbook): sudo -i ifconfig eth0 0.0.0.0 ifconfig eth2 0.0.0.0 brctl addbr bridget brctl addif bridget eth0 brctl addif bridget eth2 ifconfig bridget up ...then, trying to make sure that the netbook can still get on the internets... route add default gateway 192.168.2.1 dhclient bridget What happens after this is that the dhclient command above (netbook) doesn't get served an IP, and the Desktop, if I run dhclient, it doesn't get served an IP. Some weird considerations might be that I'm running the Network Manager Applet that comes with Ubuntu. While I'm sure I can get a command line wireless configuration setup, it's a bit complex. Can someone give me a shout as to where I'm going wrong? I'd also like to note another related question titled 'Bridging my laptop’s wireless and wired adaptors', however the setup is different to mine.

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• Multiple WAN interfaces on SonicWall TZ 100?

  - by Chad Decker

  I'm using a SonicWall TZ 100 with a basic configuration of X0 for the LAN and X1 for the WAN. The WAN uses DHCP to obtain its routable IP address. I want to obtain a second routable IP from my ISP. I'm in luck because my cable company will provide me with an additional dynamic IP for $5/mo. How do I bind this IP to my SonicWall? My additional dynamic IP will not be consecutive to the original one. It won't even be on the same class C. I think what I want to do is to use one of the empty ports/interfaces (X2, X3, or X4), tell that interface to use DHCP, and then add that interface to the WAN "zone". I can't figure out how to do this though. Here's what I've tried so far: (1) I've looked in Network Interfaces. I see X0 and X1 but the other unused interfaces don't show up. I don't see an "Add" button to add the new interfaces. (2) I've looked in Network Zones. I see that X0, X2, X3, X4 are in the LAN zone. I tried to drag X3 into the WAN zone but I can't. Nor does clicking the "Configure" button allow me to move an unused interface from LAN to WAN. (3) I've read the post entitled Splitting up multiple WAN's on Sonicwall. This doesn't seem applicable to me. Any thoughts?

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• Hyper-v on 2012R2 startup gen1 vm causes the host to freeze up

  - by sputnik

  I've searched a lot to resolve the following issue, but nothing helped me. My problem is, that starting up a first-gen vm locks up the whole host. Only a hard reset helps. Second-gen vm starts and runs perfectly. The freezes happened on 3 different vms. FreeBSD, Ubuntu, Windows Server 2008R2, while Windows 8.1 on second gen config works perfectly. Im using this pc mainly as a workstation. No eventlog errors nor dumps are generated. My system: Windows Server 2012R2 FX-8350, non OC ASRock 870 Extreme R2 (Crappy board imho) 32GB DDR3 1866@1600 (My motherboard, against the "support" for 1866ram won't work with full speed) 120GB SSD 4.5TB Storage space device I dont think that its due to my system, because vmware workstation was running without problems. Did I forget to configure something? Any help is appreciated. P.S: Even deactivating C1E, C6, C&Q didnt work. P.P.S: With no virtual network adapter set, the system still locks up. Creating a first gen vm without any hdds and network and launching works. Attaching a boot dvd causes the host to freeze. The host freezes as the gen1 vm begins to boot, doesn't matter if from dvd or hdd

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• Always use one slow connection in preference of a "faster" one

  - by billc.cn

  In Windows, there's this automatic metric thing where the metric is selected according to the declared speed of the link. I now have a gigabit LAN routed to a 2MB DSL service and a HSDPA mobile broadband connection. The former is always chosen for Internet packets even though the latter is actually faster. I tried setting the mobile broadband's interface metric to 1 and raising its priority in the advanced settings of the adapter settings, but this does not seem to affect the metric of the default route. The default route to the Ethernet interface always have a lower metric than the mobile broadband interface. Am I missing something here?

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• Can't initialize drive in Windows 7

  - by Abe

  I have a 2.5" laptop harddrive that I plugged into my laptop through a SATA to USB cable. It's powered by an adapter to a normal wall-plug. I want to use it as an external harddrive. It wouldn't initialize (Device is not ready), so as suggested in some instructions I found I uninstalled the drivers, unplugged it and plugged it back in. That worked, and I initialized the drive and formatted it. However I unplugged it after that and a few days later the same strategy does not work and I can't figure out how to use the drive. I can't initialize it and it doesn't show up in my computer.

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• Fixed Resource Monitor Graph Scale in Windows Server 2008 R2

  - by Clever Human

  In Windows Server 2008 R2's Resource Monitor, is there a way to set the scale of the various graphs to be constant values instead of variable based on data? It seems to me that the utility of a graph is to get a quick overview glance at the values those graphs are showing. So if I look at the CPU graph and the line is up near the top, I can know immediately that something is using all my CPU and go investigate what. I don't really care if the CPU is jumping between .01% and 2%. Or if the network usage monitor is up near the top, I will know that all my bandwidth is being used up, and go figure out what. But the way things are now, the graphs are meaningless because the scales constantly shift. If you look at the network usage graph in one second it might have a scale out of 100kbps, and the next second have a scale based on 1mbps! So... is there a registry key or something that will peg the scale of these graphs to logical maximums?

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• What steps should I take to debug this non-starting hvm virtual machine?

  - by Ophidian

  I have a dom0 machine running CentOS 5.4 with all the latest updates using Xen as my hypervisor. I am using Xen in part because this machine was set up prior to KVM being included in RHEL, and in part because KVM's network bridging configuration is not nearly as simple as Xen's. The dom0 machine is headless and I do all of my VM management via virsh from the command line. I have two hvm domU's: A web server running CentOS 5.4 A mail server running Gentoo Both VM's are backed by LV's on the dom0 but do not use LVM in the domU. Both have virtually identical libvirt configurations (differing by expected things like name, UUID, NIC MAC, VNC port, etc). The web server domU (WSdomU hereafter) does not start since applying the most recent kernel update (kernel-xen-2.6.18-164.15.1.el5.x86_64 and kernel-2.6.18-164.15.1.el5.x86_64 for the dom0 and WSdomU respectively). By 'not start' I mean it appears to be running but it does not use an CPU cycles, does not bring up a graphical console, and does not respond on the network. The WSdomU is listed as no state rather than the normal running or blocked in xentop. The mail server domU starts fine and functions normally. Here are the steps I have taken so far that did not solve the problem: Reboot the dom0 to see if things come up on their own Check xen dmesg on dom0 Check xend logs (a cursory viewing did not show anything blatant; specific suggestions of things to look for would be appreciated) Attempted to connect to the WSdomU's graphical (VNC) console from the dom0 Shutdown the mail server domU and attempt to start the WSdomU Check the SELinux labels on backing LV's (they're the same) Set SELinux to permissive and attempt to start the WSdomU Use virsh edit to try tweaking the WSdomU config virsh undefine, reboot, virsh define the WSdomU config dd the WSdomU LV to an .img file, copy it to my Fedora desktop and run it under KVM (works fine) What steps should I take next to debug this? I will edit in any additional configuration's requested in the comments.

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• cannot connect to <server_name>\sqlexpress

  - by Jackson Sunuwar

  I have tried disabling firing wall and checked sqlbrowser is started but for some reason I cannnot connect to my datbase... called server_name\sqlexpress.. I have a virtual machine and a full scale MS SQL Server 2008 R2 running on it... and I have several other vm running sqlexpress. they run fine and I can connect to them using sqlexpress... but when i try to access from sqlserver... I get this error. A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified) (Microsoft SQL Server, Error: -1) Digging deep into the error, I found this Error Number: -1 Severity: 20 State: 0 and finally this... Program Location: at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) at System.Data.SqlClient.TdsParser.Connect(ServerInfo serverInfo, SqlInternalConnectionTds connHandler, Boolean ignoreSniOpenTimeout, Int64 timerExpire, Boolean encrypt, Boolean trustServerCert, Boolean integratedSecurity, SqlConnection owningObject) at System.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo serverInfo, String newPassword, Boolean ignoreSniOpenTimeout, Int64 timerExpire, SqlConnection owningObject) at System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(String host, String newPassword, Boolean redirectedUserInstance, SqlConnection owningObject, SqlConnectionString connectionOptions, Int64 timerStart) at System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(SqlConnection owningObject, SqlConnectionString connectionOptions, String newPassword, Boolean redirectedUserInstance) at System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, Object providerInfo, String newPassword, SqlConnection owningObject, Boolean redirectedUserInstance) at System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection) at System.Data.ProviderBase.DbConnectionFactory.CreateNonPooledConnection(DbConnection owningConnection, DbConnectionPoolGroup poolGroup) at System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection) at System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory) at System.Data.SqlClient.SqlConnection.Open() at Microsoft.SqlServer.Management.SqlStudio.Explorer.ObjectExplorerService.ValidateConnection(UIConnectionInfo ci, IServerType server) at Microsoft.SqlServer.Management.UI.ConnectionDlg.Connector.ConnectionThreadUser() Firewall is turned off on the VM that's running mssqlserver... I turned of firewall on one of the vm that's running the sqlexpress but I still get the error... can someone please help... thank you

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• Joining Samba to Active Directory with local user authentication

  - by Ansel Pol

  I apologise that this is somewhat incoherent, but hopefully someone will be able to make enough sense of this to understand what I'm trying to achieve and provide pointers. I have a machine with two network interfaces connected to two different networks (one of which it's providing several other services for, such as DNS), running two separate instances of Samba, one bound to each interface. One of the instances is just a workgroup-style setup using share-level authentication, which is all working fine. The problem is that I'm looking to join the other instance to an MS Active Directory domain (provided by MS Windows Small Business Server 2003) to enable a subset of the domain users to access the shares from Windows machines on the other network. The users who need access from the domain environment have accounts (whose names are all-lowercase versions of their domain usernames) on the machine running Samba, but I'm not sure about how to map the UIDs and everything I've read concerns authenticating accounts on that machine against either AD or another LDAP server. To clarify: I only want the credentials for AD users accessing the non-workgroup Samba instance to be authenticated against AD, not the accounts on the machine running Samba. I hope this is sufficiently clear. EDIT: In addition to being able to access the Samba shares from AD, I do also need to be able to access a share on the domain from the machine running Samba but would still like everything non-Samba-related to authenticate locally.

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