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• IIS crashes with unhandled exception in ASP.NET

  - by SnowCrash

  We had an issue recently with an unhandled exception in an ASP.NET C# application bringing down IIS and all application pools that it was hosting. IIS Manager was unable to restart or stop/start the service and I was unable start IIS again after killing w3wp.exe in the task manager. A system reboot restored IIS to a running state; as a primarily Linux admin, I generally consider an unplanned system reboot to resolve a software error to be an act of high heresy. Is there a way to "harden" IIS so that a faulting application does not affect anything but the request that exposes the fault? Some details on the server and application fault. IIS: 7.5 .NET: 4.0 Windows Server 2008 R2 Faulted on call to System.Net.Dns.Resolve() with a url pointing to a non-existant domain as the argument. (I'm aware that this method is deprecated but the point that a page code issue shouldn't bring down the server still stands) The exception generated was SocketException. The faulting module according to event viewer was KERNELBASE.dll The issue was resolved by wrapping the call in a try-catch, logging the exception and displaying some generic content on the page. I'm hoping that I missed something in the IIS config that would switch it to "production" mode or something.

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• Ubuntu Laptop as a wireless hotspot on bridge mode

  - by nixnotwin

  I have a wired router to which my ubuntu laptop connects via ethernet. The wierless NIC of the laptop acts as a wireless hotspot on master mode. I use hostapd fo this. I have bridged eth0 and wlan0, so my wireless clients that connect to my laptop over wifi get ip from the wired router via dhcp, so the devices get registered at the wired router ( and the laptop is just an access point). I use the following commands to get my laptop+accesspoint working: sudo brctl addbr br0 sudo brctl addif br0 eth0 sudo hostapd /etc/hostapd/hostapd.conf & sudo dhclient -d br0 & sudo ifconfig wlan0 192.168.1.15 netmask 255.255.255.0 up sudo brctl addif br0 wlan0 These commands enable me to access internet on my wireless clients and also on the laptop which is acting as wireless accesspoint. But if I reboot the wired router (without rebooting the laptop that is acting as accesspoint), Internet access on the laptop+accesspoint gets lost, but on wireless clients it works fine. Even I have not been able to figure out a command which will reset the laptop interfaces to default settings, so everytime the router reboots, I have to reboot the laptop too to get into default settings so that I can re-enter the above mentioned commands. My first question is How can I have my bridge+accesspoint up and running even-though the router reboots? And is there a command to set the interfaces to a default state? (ifdown -a doesn't work, after issuing the command the bridge still remained).

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• Conditionally Rewrite Email Headers (From & Reply-To) Exchange 2010

  - by NorthVandea

  I have a client who maintains Company A (with email addresses %username%@companyA.com) and they own the domain companyB.com however there is no "infrastructure" (no Exchange server) set up specifically for companyB.com. My client needs to be able to have the end users within it's company (companyA.com) add a specific word or phrase to the Subject (or Body) line of the Outgoing email (they are only concerned with outgoing, incoming is a non-issue in this case) that triggers the Exchange 2010 servers to rewrite the header From and Reply-To [email protected] with [email protected] but this re-write should ONLY occur if the user places the key word/phrase in the Subject (or Body). I have attempted using Transport Rules and the New-AddressRewriteEntry cmdlet however each seems to have a limitation. From what I can tell Transport Rules cannot re-write the From/Reply-To fields and New-AddressRewriteEntry cannot be conditionally triggered based on message content. So to recap: User sends email outside the organization: From and Reply-To remain [email protected] User sends email outside the organization WITH "KeyWord" in the Subject or Body: From and Reply-To change to [email protected] automatically. Anyone know how this could be done WITHOUT coding a new Mail Agent? I don't have the programming knowledge to code a custom Agent... I can use any function of Exchange Management Shell or Console. Alternatively if anyone knows of a simple add-on program that could do this that would be good too. Any help would be greatly appreciated! Thank you!!!

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• Tracking down the cause of a web service fault running in IIS

  - by BG100

  I have built a web service in Visual Studio 2008, and deployed it on IIS 7 running on Windows Server 2008 R2. It has been extensively tested, handles all errors gracefully and logs any uncaught errors to a file using log4net. The system normally runs perfectly, but occasionally (2 or 3 times a day) a fault occurs and screws up the application which needs an iisreset to get it working again. When the fault occurs I get some random errors that are caught by my catch-all error log, such as: Value cannot be null. Could not convert from type 'System.Boolean' to type 'System.DateTime'. Sequence contains no elements These errors are raised on every request until I manually do an iisreset, but there is no sight of them when the system is running normally. The web service is a stateless request-response application. Nothing is stored in the session. It could be load related, but I doubt it as there are only around 30 or 40 requests per minute. This is proving very tricky to track down. I can't work out what is putting IIS into this bad state, and why it needs an iisreset to get it working again. Nothing is reported in the event log. Can anyone suggest how to enable more extensive logging that might catch this fault? Also, does anyone know what might be causing the problem?

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• Unable to browse to apache service, Service is running

  - by Jeff

  Summary I have a very peculiar problem. I am not able to open the "It Works!" page after installing a fresh server with apache. I am able to ssh to the box (from outside the network). Apache seems to be running on my Centos6.4x86_64 box just fine. Nothing useful in /var/logs/httpd/*. What am I missing? The setup I am outside the network right now. The "server" is a VM on my home computer running bridged mode. public ip: A.B.C.D Host: 192.168.1.5 VM: 192.168.1.8 I have a verizon fios router that is forwarding ports 22, 80, and 8888 to the VM. I am able to ssh over port 22, but I am not able to browse to the public URL over port 80. so A.B.C.D:22 is working, but http://A.B.C.D:80 is not. What I've tried nmap to see if it is listening: nmap -sT -O localhost Starting Nmap 5.51 ( http://nmap.org ) at 2013-10-25 11:10 EDT Nmap scan report for localhost (127.0.0.1) Host is up (0.000040s latency). Other addresses for localhost (not scanned): 127.0.0.1 Not shown: 996 closed ports PORT STATE SERVICE 22/tcp open ssh 25/tcp open smtp 80/tcp open http 3306/tcp open mysql I tried going to it locally (lynx) and it does work. So, is the problem in my ports?

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• Ubuntu Laptop as a wireless hotspot on bridge mode

  - by nixnotwin

  I have a wired router to which my ubuntu laptop connects via ethernet. The wierless NIC of the laptop acts as a wireless hotspot on master mode. I use hostapd fo this. I have bridged eth0 and wlan0, so my wireless clients that connect to my laptop over wifi get ip from the wired router via dhcp, so the devices get registered at the wired router ( and the laptop is just an access point). I use the following commands to get my laptop+accesspoint working: sudo brctl addbr br0 sudo brctl addif br0 eth0 sudo hostapd /etc/hostapd/hostapd.conf & sudo dhclient -d br0 & sudo ifconfig wlan0 192.168.1.15 netmask 255.255.255.0 up sudo brctl addif br0 wlan0 These commands enable me to access internet on my wireless clients and also on the laptop which is acting as wireless accesspoint. But if I reboot the wired router (without rebooting the laptop that is acting as accesspoint), Internet access on the laptop+accesspoint gets lost, but on wireless clients it works fine. Even I have not been able to figure out a command which will reset the laptop interfaces to default settings, so everytime the router reboots, I have to reboot the laptop too to get into default settings so that I can re-enter the above mentioned commands. My first question is How can I have my bridge+accesspoint up and running even-though the router reboots? And is there a command to set the interfaces to a default state? (ifdown -a doesn't work, after issuing the command the bridge still remained).

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• Diagnosing Microsoft SQL Server error 9001: The log for the database is not available.

  - by Scott Mitchell

  Over the weekend a website I run stopped functioning, recording the following error in the Event Viewer each time a request is made to the website: Event ID: 9001 The log for database 'database name' is not available. Check the event log for related error messages. Resolve any errors and restart the database. The website is hosted on a dedicated server, so I am able to RDP into the server and poke around. The LDF file for the database exists in the C:\Program Files\Microsoft SQL Server\MSSQL10.MSSQLSERVER\MSSQL\DATA folder, but attempting to do any work with the database from Management Studio results in a dialog box reporting the same error - 9001: The log for database is not available... This is the first time I've received this error, and I've been hosting this site (and others) on this dedicated web server for over two years now. It is my understanding that this error indicates a corrupt log file. I was able to get the website back online by Detaching the database and then restoring a backup from a couple days ago, but my concern is that this error is indicative of a more sinister problem, namely a hard drive failure. I emailed support at the web hosting company and this was their reply: There doesn't appear to be any other indications of the cause in the Event Log, so it's possible that the log was corrupted. Currently the memory's resources is at 87%, which also may have an impact but is unlikely. Can the log just "become corrupted?" My question: What are the next steps I should take to diagnose this problem? How can I determine if this is, indeed, a hardware problem? And if it is, are there any options beyond replacing the disk? Thanks

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• How to read cell data in excel and output to command prompt

  - by Max Ollerenshaw

  Hi All, I'm a sys admin and I am trying to learn how to use powershell... I have never done any type of scripting or coding before and I have been teaching myself online by learning from the technet script centre and online forums. What I am trying to accomplish is to open an excel spreadsheet get information from it (usernames and password) and then output it into the command prompt in powershell. When ever I try to do this I get an Exception calling "InvokeMember" anyway, here is the code I have so far: function Invoke([object]$m, [string]$method, $parameters) { $m.PSBase.GetType().InvokeMember( $method, [Reflection.BindingFlags]::InvokeMethod, $null, $m, $parameters,$ciUS ) } $ciUS = [System.Globalization.CultureInfo]'en-US' $objExcel = New-Object -comobject Excel.Application $objExcel.Visible = $False $objExcel.DisplayAlerts = $False $objWorkbook = Invoke $objExcel.Workbooks.Open "C:\PS\User Data.xls" Write-Host "Numer of worksheets: " $objWorkbook.Sheets.Count $objWorksheet = $objWorkbook.Worksheets.Item(1) Write-Host "Worksheet: " $objWorksheet.Name $Forename = $objWorksheet.Cells.Item(2,1).Text $Surname = $objWorksheet.Cells.Item(2,2).Text Write-Host "Forename: " $Forename Write-Host "Surname: " $Surname $objExcel.Quit() If (ps excel) { kill -name excel} I have read many different posts on forums and articles on how to try and get around the en-US problem but I cannot seem to get around it and hope that someone here can help! Here is the Exeption problem I mentioned: Exception calling "InvokeMember" with "6" argument(s): "Method 'System.Management.Automation.PSMethod.C:\PS\User Data.x ls' not found." At C:\PS\excel.ps1:3 char:33 + $m.PSBase.GetType().InvokeMember <<<< ( + CategoryInfo : NotSpecified: (:) [], MethodInvocationException + FullyQualifiedErrorId : DotNetMethodException Numer of worksheets: You cannot call a method on a null-valued expression. At C:\PS\excel.ps1:18 char:45 + $objWorksheet = $objWorkbook.Worksheets.Item <<<< (1) + CategoryInfo : InvalidOperation: (Item:String) [], RuntimeException + FullyQualifiedErrorId : InvokeMethodOnNull Worksheet: You cannot call a method on a null-valued expression. At C:\PS\excel.ps1:21 char:37 + $Forename = $objWorksheet.Cells.Item <<<< (2,1).Text + CategoryInfo : InvalidOperation: (Item:String) [], RuntimeException + FullyQualifiedErrorId : InvokeMethodOnNull You cannot call a method on a null-valued expression. At C:\PS\excel.ps1:22 char:36 + $Surname = $objWorksheet.Cells.Item <<<< (2,2).Text + CategoryInfo : InvalidOperation: (Item:String) [], RuntimeException + FullyQualifiedErrorId : InvokeMethodOnNull Forename: Surname: This is the first question I have ever asked, try to be nice! :)) Many Thanks Max

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• Can I recover a zpool after it's been exported, given that devices have not been reallocated?

  - by cali-spc

  I had a zpool we'll call 'testpool'. testpool had 3 devices included in it, and a single zfs called 'test'. I needed to move 'test' to a new, smaller pool. I wanted to name the new pool the same name 'testpool'. Basically did the following. zfs send testpool@backup > /tmp/test-dump zpool export -f testpool zpool create -f testpool newdevice zfs receive -F testpool < /tmp/test-dump Unfortunately I found out that the testpool@backup snapshot was the wrong snapshot. Too old. I have yet to reallocate the three devices that were in the OLD testpool. (None of these 3 devices are 'newdevice', they are a separate 3.) Is there any way I can recover data in those devices? I'm thinking since I named the new, smaller pool the same as the old zpool, I'm pretty much SOL. But if not, that would be nice to know. Edit: More info I did a 'zpool import' and got this. bash-3.00# zpool import pool: testpool id: 14781458723915654709 state: ONLINE action: The pool can be imported using its name or numeric identifier. config: testpool ONLINE c5t8d0 ONLINE c5t9d0 ONLINE c5t10d0 ONLINE So I'm guessing I just need the syntax to import this zpool using its numeric identifier, while giving it a new name. S.

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• Hyper-V VM Lab + RRAS + RDP

  - by Dennis Evans

  My background is primarily .NET Development with some System Administration skills. I'm trying to set up a VM Lab for me to test System Applications I'm developing but I've only ever done System Administration in already set up environments; I've never set up my own. My current setup: Server 2008 R2 Hyper-V Host on physical machine (only role enabled) with two NICs. First NIC dedicated for Management w/ DHCP address from company's network. Second NIC dedicated to RRAS VM w/ DHCP address from company's network. RRAS VM has two NICS, one is virtual private internal only NIC w/ static entry. The other is the physical NIC mentioned above. I've joined it to my VMLab.net internal domain. My Active Directory Domain Controller server (ADCT) also runs DNS, DHCP, and Certificate Services which I'm familiar with but don't understand completely. RRAS is already set up with NAT to provide the private internal network with Internet access. What I would like to do is be able to RDP into the servers/computers on the VMLab.net domain from my computer. Do I need to add the Remote Desktop Services role and enable the Remote Desktop Gateway service on RRAS in order to do this or is there a way to set up port forwarding on RRAS to just allow a direct connection to the internal servers...or both? What would the best practices be here? Network Diagram http://i.stack.imgur.com/4qfnk.png

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• Central Authentication For Windows, Linux, Network Devices

  - by mojah

  I'm trying to find a way to centralize user management & authentication for a large collection of Windows & Linux Servers, including network devices (Cisco, HP, Juniper). Options include RADIUS/LDAP/TACACS/... Idea is to keep track with staff changes, and access towards these devices. Preferably a system that is compatible with both Linux, Windows & those network devices. Seems like Windows is the most stubborn of them all, for Linux & Network equipment it's easier to implement a solution (using PAM.D for instance). Should we look for an Active Directory/Domain Controller solution for Windows? Fun sidenote; we also manage client systems, that are often already in a domain. Trust-relationships between Domain Controllers isn't always an option for us (due to client security restrictions). I'd love to hear fresh ideas on how to implement such a centralized authentication "portal" for those systems.

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• Tracking down source of duplicate email messages in Outlook / Exchange environment

  - by Ken Pespisa

  I have a few users, who are also Blackberry users, that occasionally have duplicate emails generated from their "mailbox". I put mailbox in quotes because I'm not exactly sure where the duplicates are created. One of these users is in non-cached mode, and the other is in cached mode, and both experience the problem. In fact, the non-cached mode user was originally experiencing the problem while in cached mode, and I made the switch a few weeks ago to attempt to solve the problem. Today I discovered the issue still exists. I'm not sure if the fact that they are blackberry users could be causing the problem at all. I don't see how, but felt I should mention it anyway. Does anyone have ideas on how I might begin to troubleshoot this? I can see in the non-cached user's mailbox "Sent Items" that the message was sent only once. I confirmed the message does not state that there was a conflict and in fact that makes sense because they are in non-cached mode. On the server, we have a mail journaling feature turned on for our third-party mail archiving system, and I can see that that system sees two sent messages. And likewise, the recipient does in fact have two messages in their inbox with consecutive message IDs ([email protected]) and ([email protected]). It would seem to me that the duplicates are generated on the client, but is there a way to tell for sure?

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• Remote search system for samba shares

  - by fostandy

  I have several shares residing on a samba server in a small business environment that I would like to provide search facilities for. Ideally this would be something like google desktop with some extra features (see below), but lacking this the idea is to take what I can get, or at least get an idea for what is out there. Using google desktop search as a reference model, the principle additional requirement is that it is usable from clients over the network. In addition there are some other notes (note that none of these are hard requirements) The content is always files, residing on a single server, accessible from samba shares. Standard ms office document fare Also a lot of rars and zips which it is necessary to search inside. Permissions support, allowing for user-based control to reflect current permission access in samba shares. The userbase will remain fairly static, so manual management of users is fine. majority of users will be Windows based I know there are plenty of search indexers out there: beagle and tracker seem to be the most popular. Most do not seem to offer access control and web-based/remote search does not seem to be high priority. I've also seen a recent post on the samba mailing list asking for pretty much the exact same thing. (They mention a product called IBM OmniFind Yahoo! Edition and while their initial reception seems positive, I am pretty skeptical. RHEL 4? Firefox 2? Updated much?) edit: similar question here What else is out there? Are you in a similar situation? What do you use?

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• Website has become slower on a VPS, was much fast on a shared host. What's wrong?

  - by Arpit Tambi

  My shared host suspended my website stating system overload, so I moved my website to a VPS which has 4GB RAM. But for some reason the website has become very slow. This is the vmstat output - procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu------ r b swpd free buff cache si so bi bo in cs us sy id wa st 1 0 0 3050500 0 0 0 0 0 1 0 0 0 0 100 0 0 Here's the Apache Benchmark output for a STATIC html page I ran on the server itself - Benchmarking www.ask-oracle.com (be patient)...apr_poll: The timeout specified has expired (70007) Total of 20 requests completed Update: Server Config: List item Centos 5.6 4 cores cpu 4 GB RAM LAMP stack with APC Wordpress Only one website It takes almost double time to load now, same website was much fast on shared hosting. I know I need to tweak some settings but have no clue where to start from? I have already tried to optimize apache, mysql etc. Update 2: CPU usage is low, see uptime output: 11:09:02 up 7 days, 21:26, 1 user, load average: 0.09, 0.11, 0.09 Update 3: When I load any webpage, browser shows "Waiting" for a long time and then page loads quickly. So I suspect server can accept only limited connections and holds extra connections in a waiting state. How to check this? Update 4: Following is the output on executing netperf TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to localhost.localdomain (127.0.0.1) port 0 AF_INET Recv Send Send Socket Socket Message Elapsed Size Size Size Time Throughput bytes bytes bytes secs. 10^6bits/sec 87380 16384 16384 10.00 9615.40 [root@ip-118-139-177-244 j3ngn5ri6r01t3]# Here are the Apache MPM settings from httpd.conf, do they look okay? <IfModule worker.c> StartServers 5 MaxClients 100 MinSpareThreads 50 MaxSpareThreads 250 ThreadsPerChild 125 MaxRequestsPerChild 10000 ServerLimit 100 </IfModule>

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• Finding useful crash-information in Windows 8 Consumer Preview

  - by Lukas Knuth

  I'm currently diving into C# and wanted to play around with the new Metro-styled-applications introduced with Windows 8, so I updated my Windows 7 to Windows 8 Consumer Preview. The problem I'm facing right now is, that the system freezes after 3-5 minutes. It does not take any input from the keyboard or mouse and it does not recover (at least not in less then 10 minutes). Since I have a background in Linux, I'd like to find some information about the cause of the freeze, but I have no idea where to search. I checked the system-logs (under "System Control" - "Management") but they only record that the system was shut down unexpectedly (doe to the face that I held down the power-button to reboot the PC). There is no useful crash-information in there. I don't want to spend hours on randomly reinstalling drivers and doing things that "might help". Isn't there any place I can find some useful information about the freeze? Before you ask: I installed Windows 8 as an updated on my old Windows 7 installation (which worked fine by the way). My hardware fits the minimum requirements (specs can be found here, the MacMini 3,1 model with 2GHz processor). I have updated the graphics-card drivers to the newest Windows 8 drivers from nVidia.

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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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• Sometimes, Synaptics Touchpad Tends Cursor to Top-Right Corner

  - by John Chadwick

  This has been a reoccurring issue for me, pretty much since I've owned this laptop (an ASUS G60JX.) Sometimes, the cursor will stop working properly and instead tend toward the top right of the screen. Basically, sometime into my usage (maybe after a couple hours) the touchpad will inevitably begin to malfunction, where it has confusing patterns of pushing the mouse cursor toward the top right of the screen. In addition, certain features (like momentum) seem to quit working entirely. It makes using the cursor extremely difficult. I've been having this issue across very many drivers. Pretty much as soon as multitouch came into the mix, although I don't believe multitouch has anything to do with it. It appears that, in the state of malfunction, it doesn't matter how you touch the touchpad, but where you touch it. Certain regions do not seem to trigger the cursor to move to the top right corner. In fact, no specific region seems to, but some areas do so more often than others. The issue can be resolved temporarily by putting the computer into sleep mode and awakening it. I have found no way to recreate this success without sleeping the computer or rebooting. Disabling and re-enabling the touchpad device does not do anything to resolve the problem. This issue does not affect my WACOM tablet nor any USB mice, and can be resolved (not to my satisfactory) by uninstalling the touchpad drivers. I'm looking for a solution, or at least a workaround that doesn't require sleep mode.

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• Integrating Nagios with a ticketing system/incident mnagement system

  - by sektor

  Is there a free ticketing system/incident management system which will help me in achieving the following? 1) If a service goes down then Nagios alerts the on-duty staff and pushes the status to some backend or DB as a ticket, say the initial status is "New". 2) The on-duty staff logs in through a frontend and acknowledges the new ticket by marking it as "In progress", so now the status of the ticket changes from "New" to "In progress". 3) If even after "n" number of minutes no person from on-duty staff has changed the ticket status to "In progress" then Nagios alerts the next level of contacts. Although if the on-duty staff has acknowledged the ticket then there is no need to alert the next level. 4) When the service comes up Nagios closes the ticket by marking it "Closed" Now I already have Nagios monitoring set up and currently it alerts by sending text messages and mails, what I'm looking for is some framework which only escalates the issue(alerts the second level) if the first level(on-duty staff) fails to respond to the initial alert. By "responding to the alert" I mean, the on-duty staff can login via some frontend and basically change the status to something like "Acknowledged" or "In progress".

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• Setting up Live @ EDU

  - by user73721

  [PROBLEM] Hello everyone. I have a small issue here. We are trying to get our exchange accounts for students only ported over from an exchange server 2003 to the Microsoft cloud services known as live @ EDU. The problem we are having is that in order to do this we need to install 2 pieces of software 1: OLSync 2: Microsoft Identity Life cycle Manager "Download the Galsync.msi here" the "Here" link takes you to a page that needs a login for an admin account for live @ EDU. That part works. However once logged in it redirects to a page that states: https://connect.microsoft.com/site185/Downloads/DownloadDetails.aspx?DownloadID=26407 Page Not Found The content that you requested cannot be found or you do not have permission to view it. If you believe you have reached this page in error, click the Help link at the top of the page to report the issue and include this ID in your e-mail: afa16bf4-3df0-437c-893a-8005f978c96c [WHAT I NEED] I need to download that file. Does anyone know of an alternative location for that installation file? I also need to obtain Identity Lifecycle Management (ILM) Server 2007, Feature Pack 1 (FP1). If anyone has any helpful information that would be fantastic! As well if anyone has completed a migration of account from a on site exchange 2003 server to the Microsoft Live @ EDU servers any general guidance would be helpful! Thanks in advance.

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• EC2 instance is blocking all outbound connections, how to diagnose/fix?

  - by Fraggle

  My EC2 instance is blocking all outbound connections. wget http://www.google.com ==> Hangs ping google.com ==>hangs ssh user@anyserver ==>hangs I ran : sudo iptables -F to eliminate all rules to no avail AWS Management console shows Security Group for that instance has Inbound rule allowing ssh and port 80. Can't find anything about Outbound rules there. Rebooted instance, no change. If anyone knows how to diagnose or fix, please help. Adding info: [ec2-user@ip-10-112-62-73 ~]$ ifconfig eth0 Link encap:Ethernet HWaddr 12:31:3D:06:31:BB inet addr:10.112.62.73 Bcast:10.112.63.255 Mask:255.255.254.0 inet6 addr: fe80::1031:3dff:fe06:31bb/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:1933 errors:0 dropped:0 overruns:0 frame:0 TX packets:1764 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:164075 (160.2 KiB) TX bytes:343256 (335.2 KiB) Interrupt:9 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:8 errors:0 dropped:0 overruns:0 frame:0 TX packets:8 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:672 (672.0 b) TX bytes:672 (672.0 b) [ec2-user@ip-10-112-62-73 ~]$ ip route show 10.112.62.0/23 dev eth0 proto kernel scope link src 10.112.62.73 default via 10.112.62.1 dev eth0

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• How can you connect to a SQL Server not on your domain?

  - by scotty2012

  I have a test machine that's not allowed on our domain because we are testing corporately unsupported applications (SQL 2008 and Server 2008). I want to use management studio to connect to the SQL2008 server but can't get it working. I have authentication set to mixed-mode, I've checked 'allow remote connections to this server', but when I try to access it, I get the 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: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) (Microsoft SQL Server, Error: 53) Since it says the provider is Named Pipes, I enabled Named Pipes on the server, but still no dice. I've tried connecting to the system name, the IP, the system name\instance and IP\instance, all to no avail. Is what I'm trying to do not possible? Edit: Well, through some basic troubleshooting, I've found that I can't ping the server from my client computer, but I can ping the client computer from the server? They are both plugged into the same switch, and are sitting next to each other. The windows firewall on the server is turned on, is there some specific settings I need to enable? DAH! So it was the firewall blocking me. How can I enable the firewall and still connect?

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• Win7 Credential manager and accessing SQL Server from outside of the domain

  - by David Lively

  My SQL Server is set to use windows authentication. If I am connected to the domain directly from my Win7 Ultimate x64 machine, SQL Management Studio (SSMS) will let me authenticate with Windows authentication. However, if I am connected via the VPN (from a different machine that is not joined to the domain), it won't. If I start SSMS with the following command line: C:\Windows\system32>runas /netonly /user:domainname\username "C:\Program Files (x86)\Microsoft SQL...\ssms.exe" then connecting to the SQL Server (which is in the domain) with Windows Authentication works fine. I'd like to save these credentials so that I don't have to launch SSMS from the command line, or modify the shortcut. I know I can use the SysInternals ShellRunAs extension to do this, but I again have to enter my domain username and password each time, and shift+right-click to see that menu option. The Windows Credential Manager seems designed to solve this problem, and works for network shares. However, it doesn't seem to work for SSMS. Any suggestions? I've tried using the /savecred option with runas to create the necessary credentials, but that appears to be incompatible with the /netonly option. Running the above command line with the addition of /savecred just displays the runas help screen. Grrr. Argh.

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• How do I secure Sql Server 2008 R2

  - by Mark Tait

  I have both a dedicated and a VPS (from Fasthosts) virtual server - the web sites/applications I run on these, access Sql Server stored on the same web server. Until now, I have logged onto Sql Server on both the deidicated and VPS server, from Sql Server Management Studio - until I noticed in my server application logs, multiple attempts to logon to Sql Server using the 'sa' username, but failed password. So someone/bot is trying hard (repeatedly every couple of hours, for approx 20 attempts during each instance) to log on... so obviously I have to lock down access to Sql Sever remotely. What I have done is gone into Configuration Manager, and in Sql Server Network Configuration - Protocols for Sql2008 and also in Sql Native Client 10.0 Configuration - Client Protocols - I have diabled Named Pipes, TCP/IP (and VIA by default). I have left Shared Memory enabled. I also disabled in Sql Server Services, the Sql Server Browser. Now the only way I can manage the databases on these servers, is by logging on to them via Remote Desktop. Can anyone confirm if this is the correct way of stopping anyone maliciously logging on to Sql Server? (I'm not a DBA or security expert - and there are hundreds of articles advising all different ways - but I was hoping for the experts here to confirm, or otherwise, if what I've done is correct) Thank you, Mark

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• BIND returns serverfail when querying for its authoriative domain

  - by estol

  Hi there Serverfault folks! First of all: sorry about the title, I had some problem coming up with the proper title. I have a little home server set up, for internet sharing, samba, basic http, dlna mediaserver and what not, and I happend to have a domain at hand, so I thought why not direct it to this computer? I have a BIND 9.8.0 installed, and - afaik - configured it properly. For a few days, the public view did not worked, and I really did not cared, since the local view worked. But now suddenly, even the local view fails. If I try to query the nameserver for anything in my domain, it returns the following error: $ nslookup andromeda.dafaces.com ;; Got SERVFAIL reply from ::1, trying next server ;; Got SERVFAIL reply from ::1, trying next server Server: 127.0.0.1 Address: 127.0.0.1#53 ** server can't find andromeda.dafaces.com.dafaces.com: SERVFAIL Also, the public view points to the old ip address of the domain, probably because of the same error. Some information about the system: $ uname -a Linux tressis 2.6.37-ARCH #1 SMP PREEMPT Tue Mar 15 09:21:17 CET 2011 x86_64 AMD Athlon(tm) 64 X2 Dual Core Processor 5000+ AuthenticAMD GNU/Linux $ named -v BIND 9.8.0 And the named.conf file: # cat /etc/named.conf // // /etc/named.conf // include "/etc/rndc.key"; #controls { # inet 127.0.0.1 allow {localhost; } keys { "dnskulcs"; }; #}; options { directory "/var/named"; pid-file "/var/run/named/named.pid"; auth-nxdomain yes; datasize default; // Uncomment these to enable IPv6 connections support // IPv4 will still work: listen-on-v6 { any; }; listen-on { any; }; // Add this for no IPv4: // listen-on { none; }; // Default security settings. // allow-recursion { 127.0.0.1; ::1; 192.168.1.0/24; }; // allow-recursion { any; }; allow-query { any; }; allow-transfer { 127.0.0.1; ::1; 92.243.14.172; 87.98.164.164; 88.191.64.64; }; allow-update { key "dnskulcs"; }; version none; hostname none; server-id none; zone-statistics yes; forwarders { 213.46.246.53; 213.26.246.54; 8.8.8.8; 8.8.4.4; 192.188.242.65; 193.227.196.3; 2001:470:20::2; }; }; view "local" { match-clients { 192.168.1.0/24; 127.0.0.1; ::1; fec0:0:0:ffff::/64; }; recursion yes; zone "localhost" IN { type master; file "localhost.zone"; allow-transfer { any; }; }; zone "0.0.127.in-addr.arpa" IN { type master; file "127.0.0.zone"; allow-transfer { any; }; }; zone "." IN { type hint; file "root.hint"; }; zone "dafaces.com" IN { type master; file "internal/dafaces.com.fw"; allow-update { key "dnskulcs"; }; }; zone "1.168.192.in-addr.arpa" IN { type master; file "internal/dafaces.com.rev"; allow-update { key "dnskulcs"; }; }; }; view "public" { match-clients { any;}; recursion no; zone "dafaces.com" IN { type master; file "external/dafaces.com.fw"; allow-transfer { 87.98.164.164; 195.234.42.1; 88.191.64.64; }; }; }; //zone "example.org" IN { // type slave; // file "example.zone"; // masters { // 192.168.1.100; // }; // allow-query { any; }; // allow-transfer { any; }; //}; logging { channel xfer-log { file "/var/log/named.log"; print-category yes; print-severity yes; print-time yes; severity info; }; category xfer-in { xfer-log; }; category xfer-out { xfer-log; }; category notify { xfer-log; }; }; All help would be highly appreciated! EDIT: Zone files: # cat /var/named/internal/dafaces.com.fw $ORIGIN . $TTL 3600 ; 1 hour dafaces.com IN SOA tressis.dafaces.com. postmaster.dafaces.com. ( 2011032201 ; serial 28800 ; refresh (8 hours) 7200 ; retry (2 hours) 2419200 ; expire (4 weeks) 3600 ; minimum (1 hour) ) NS tressis.dafaces.com. A 192.168.1.1 MX 10 mail.dafaces.com. $ORIGIN _tcp.dafaces.com. _http SRV 0 5 80 www.dafaces.com. _ssh SRV 0 5 22 tressis.dafaces.com. $ORIGIN dafaces.com. acrisius A 192.168.1.230 andromeda A 192.168.1.7 andromeda-win7 CNAME andromeda aspasia A 192.168.1.233 athena A 192.168.1.232 callisto A 192.168.1.102 db A 192.168.1.1 management A 192.168.1.1 ; web management for the router functions haley A 192.168.1.5 hoth A 192.168.1.101 mail A 192.168.1.1 satelite A 192.168.1.20 sony-player A 192.168.1.103 TXT "310f16de2d2712dfc4ae6e5c54f60f828e" torrent A 192.168.1.1 tracker A 192.168.1.1 tressis A 192.168.1.1 www A 192.168.1.1 zeus A 192.168.1.231 and # cat /var/named/external/dafaces.com.fw $ORIGIN . $TTL 3600 dafaces.com IN SOA ns.dafaces.com. postmaster.dafaces.com. ( 2011032405; serial 28800; refresh 7200; retry 2419200; expire 3600; minimum ) NS ns.dafaces.com. NS ns0.xname.org. NS ns1.xname.org. NS ns2.xname.org. A 89.135.129.37 MX 10 mail.dafaces.com. $ORIGIN dafaces.com. ;Szolgaltatasok _ssh._tcp SRV 0 5 22 tressis _http._tcp SRV 0 5 80 www ns A 89.135.129.37 hoth A 89.135.129.37 www A 89.135.129.37 mail A 89.135.129.37 db A 89.135.129.37 torrent A 89.135.129.37 tracker A 89.135.129.37 Edit: Ohh, hell I almost forgot. Since the node is connected to the internet via a residential connection, there is a possibility, that the public ipv4 address will change(but thank god, it is a very rare case), so I daily update the external IP address in the zone file with a shellscript: # cat /etc/cron.daily/dnsupdate #!/bin/sh FILE="/var/named/external/dafaces.com.fw" SERIAL=$(date +%Y%m%d05) PUBLIC_IP=$(ifconfig internet |sed -n "/inet addr:.*255.255.255.255/{s/.*inet addr://; s/ .*//; p}") cat $FILE | sed --posix 's/^.* serial$/\t\t\t\t\t'$SERIAL'; serial/' | sed --posix 's/[0-9]*\.[0-9]*\.[0-9]*\.[0-9]*/'$PUBLIC_IP'/' > /tmp/ujzona mv /tmp/ujzona $FILE /etc/rc.d/named reload

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• Kickstart: Serve dynamic kickstart images via a CGI or PHP script?

  - by Stefan Lasiewski

  I'd like to kickstart a couple dozen RHEL6/SL6 servers. However, some of these servers are different and I don't want to create a new ks.cfg file for each class of server. Are there any products which can generate a Kickstart file dynamically on the fly, from a template? For example, if I append a line like this to the KERNEL: APPEND ks=http://192.168.1.100/cgi-bin/ks.cgi Then the script ks.cgi can determine what host this is (Via the MAC address), and print out Kickstart options which are appropriate for that host. I could optionally override some options by passing parameters to the script, like this: APPEND ks=http://192.168.1.100/cgi-bin/ks.cgi?NODETYPE=production&IP=192.168.2.80 After we kickstart the server, we activate Cfengine/Puppet on this system and manage the system using our favorite Configuration Management product. We're experimenting with xCAT but it is proving too cumbersome. I've looked into Cobbler, but I'm not sure it does this. Update: A roll-your-own solution is discussed in the O'Reilly book: Managing RPM-Based Systems with Kickstart and Yum, Chapter 3. Customizing Your Kickstart Install Dynamic ks.cfg, which echos some of the comments in this thread: To implement such a tool is beyond the scope of this Short Cut, but I can walk through the high-level design. Any such solution would mix a data store (the things that change) with a templating solution (the things that don’t change). The data store would hold the per-machine data, such as the IP address and hostname. You would also need a unique identifier, perhaps the hostname, such that you could pick up a given machine’s data. The data store could be a flat file, XML data, or a relational database such as PostgreSQL or MySQL. In turn, to invoke the system, you pass a machine’s unique identifier as a URL parameter. For example: boot: linux ks=http://your.kickstart.server/gen_config?host-server25 In this example, the CGI (or servlet, or whatever) generates a ks.cfg for the machine server25. But where, oh where, is the code for ks.cgi?

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